From 36ebb53aae4befb0312d3d07eeec27d1a92786cb Mon Sep 17 00:00:00 2001 From: CentOS Sources Date: Feb 21 2023 08:47:03 +0000 Subject: import python3-3.6.8-48.el8_7.1 --- diff --git a/SOURCES/00386-cve-2021-28861.patch b/SOURCES/00386-cve-2021-28861.patch new file mode 100644 index 0000000..080026b --- /dev/null +++ b/SOURCES/00386-cve-2021-28861.patch @@ -0,0 +1,130 @@ +From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 +From: "Miss Islington (bot)" + <31488909+miss-islington@users.noreply.github.com> +Date: Wed, 22 Jun 2022 15:05:00 -0700 +Subject: [PATCH] 00386: CVE-2021-28861 + +Fix an open redirection vulnerability in the `http.server` module when +an URI path starts with `//` that could produce a 301 Location header +with a misleading target. Vulnerability discovered, and logic fix +proposed, by Hamza Avvan (@hamzaavvan). + +Test and comments authored by Gregory P. Smith [Google]. +(cherry picked from commit 4abab6b603dd38bec1168e9a37c40a48ec89508e) + +Upstream: https://github.com/python/cpython/pull/93879 +Tracking bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2120642 + +Co-authored-by: Gregory P. Smith +--- + Lib/http/server.py | 7 +++ + Lib/test/test_httpservers.py | 53 ++++++++++++++++++- + ...2-06-15-20-09-23.gh-issue-87389.QVaC3f.rst | 3 ++ + 3 files changed, 61 insertions(+), 2 deletions(-) + create mode 100644 Misc/NEWS.d/next/Security/2022-06-15-20-09-23.gh-issue-87389.QVaC3f.rst + +diff --git a/Lib/http/server.py b/Lib/http/server.py +index 60a4dadf03..ce05be13d3 100644 +--- a/Lib/http/server.py ++++ b/Lib/http/server.py +@@ -323,6 +323,13 @@ class BaseHTTPRequestHandler(socketserver.StreamRequestHandler): + return False + self.command, self.path, self.request_version = command, path, version + ++ # gh-87389: The purpose of replacing '//' with '/' is to protect ++ # against open redirect attacks possibly triggered if the path starts ++ # with '//' because http clients treat //path as an absolute URI ++ # without scheme (similar to http://path) rather than a path. ++ if self.path.startswith('//'): ++ self.path = '/' + self.path.lstrip('/') # Reduce to a single / ++ + # Examine the headers and look for a Connection directive. + try: + self.headers = http.client.parse_headers(self.rfile, +diff --git a/Lib/test/test_httpservers.py b/Lib/test/test_httpservers.py +index 66e937e04b..5a0a7c3f74 100644 +--- a/Lib/test/test_httpservers.py ++++ b/Lib/test/test_httpservers.py +@@ -324,7 +324,7 @@ class SimpleHTTPServerTestCase(BaseTestCase): + pass + + def setUp(self): +- BaseTestCase.setUp(self) ++ super().setUp() + self.cwd = os.getcwd() + basetempdir = tempfile.gettempdir() + os.chdir(basetempdir) +@@ -343,7 +343,7 @@ class SimpleHTTPServerTestCase(BaseTestCase): + except: + pass + finally: +- BaseTestCase.tearDown(self) ++ super().tearDown() + + def check_status_and_reason(self, response, status, data=None): + def close_conn(): +@@ -399,6 +399,55 @@ class SimpleHTTPServerTestCase(BaseTestCase): + self.check_status_and_reason(response, HTTPStatus.OK, + data=support.TESTFN_UNDECODABLE) + ++ def test_get_dir_redirect_location_domain_injection_bug(self): ++ """Ensure //evil.co/..%2f../../X does not put //evil.co/ in Location. ++ ++ //netloc/ in a Location header is a redirect to a new host. ++ https://github.com/python/cpython/issues/87389 ++ ++ This checks that a path resolving to a directory on our server cannot ++ resolve into a redirect to another server. ++ """ ++ os.mkdir(os.path.join(self.tempdir, 'existing_directory')) ++ url = f'/python.org/..%2f..%2f..%2f..%2f..%2f../%0a%0d/../{self.tempdir_name}/existing_directory' ++ expected_location = f'{url}/' # /python.org.../ single slash single prefix, trailing slash ++ # Canonicalizes to /tmp/tempdir_name/existing_directory which does ++ # exist and is a dir, triggering the 301 redirect logic. ++ response = self.request(url) ++ self.check_status_and_reason(response, HTTPStatus.MOVED_PERMANENTLY) ++ location = response.getheader('Location') ++ self.assertEqual(location, expected_location, msg='non-attack failed!') ++ ++ # //python.org... multi-slash prefix, no trailing slash ++ attack_url = f'/{url}' ++ response = self.request(attack_url) ++ self.check_status_and_reason(response, HTTPStatus.MOVED_PERMANENTLY) ++ location = response.getheader('Location') ++ self.assertFalse(location.startswith('//'), msg=location) ++ self.assertEqual(location, expected_location, ++ msg='Expected Location header to start with a single / and ' ++ 'end with a / as this is a directory redirect.') ++ ++ # ///python.org... triple-slash prefix, no trailing slash ++ attack3_url = f'//{url}' ++ response = self.request(attack3_url) ++ self.check_status_and_reason(response, HTTPStatus.MOVED_PERMANENTLY) ++ self.assertEqual(response.getheader('Location'), expected_location) ++ ++ # If the second word in the http request (Request-URI for the http ++ # method) is a full URI, we don't worry about it, as that'll be parsed ++ # and reassembled as a full URI within BaseHTTPRequestHandler.send_head ++ # so no errant scheme-less //netloc//evil.co/ domain mixup can happen. ++ attack_scheme_netloc_2slash_url = f'https://pypi.org/{url}' ++ expected_scheme_netloc_location = f'{attack_scheme_netloc_2slash_url}/' ++ response = self.request(attack_scheme_netloc_2slash_url) ++ self.check_status_and_reason(response, HTTPStatus.MOVED_PERMANENTLY) ++ location = response.getheader('Location') ++ # We're just ensuring that the scheme and domain make it through, if ++ # there are or aren't multiple slashes at the start of the path that ++ # follows that isn't important in this Location: header. ++ self.assertTrue(location.startswith('https://pypi.org/'), msg=location) ++ + def test_get(self): + #constructs the path relative to the root directory of the HTTPServer + response = self.request(self.base_url + '/test') +diff --git a/Misc/NEWS.d/next/Security/2022-06-15-20-09-23.gh-issue-87389.QVaC3f.rst b/Misc/NEWS.d/next/Security/2022-06-15-20-09-23.gh-issue-87389.QVaC3f.rst +new file mode 100644 +index 0000000000..029d437190 +--- /dev/null ++++ b/Misc/NEWS.d/next/Security/2022-06-15-20-09-23.gh-issue-87389.QVaC3f.rst +@@ -0,0 +1,3 @@ ++:mod:`http.server`: Fix an open redirection vulnerability in the HTTP server ++when an URI path starts with ``//``. Vulnerability discovered, and initial ++fix proposed, by Hamza Avvan. diff --git a/SOURCES/00387-cve-2020-10735-prevent-dos-by-very-large-int.patch b/SOURCES/00387-cve-2020-10735-prevent-dos-by-very-large-int.patch new file mode 100644 index 0000000..c989a0b --- /dev/null +++ b/SOURCES/00387-cve-2020-10735-prevent-dos-by-very-large-int.patch @@ -0,0 +1,1381 @@ +From ef282220bd6e759c125c82351355d27627a0c08f Mon Sep 17 00:00:00 2001 +From: Victor Stinner +Date: Thu, 15 Sep 2022 17:35:24 +0200 +Subject: [PATCH] 00387: CVE-2020-10735: Prevent DoS by very large int() + +gh-95778: CVE-2020-10735: Prevent DoS by very large int() (GH-96504) + +Converting between `int` and `str` in bases other than 2 +(binary), 4, 8 (octal), 16 (hexadecimal), or 32 such as base 10 (decimal) now +raises a `ValueError` if the number of digits in string form is above a +limit to avoid potential denial of service attacks due to the algorithmic +complexity. This is a mitigation for CVE-2020-10735 +(https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-10735). + +This new limit can be configured or disabled by environment variable, command +line flag, or :mod:`sys` APIs. See the `Integer String Conversion Length +Limitation` documentation. The default limit is 4300 +digits in string form. + +Patch by Gregory P. Smith [Google] and Christian Heimes [Red Hat] with feedback +from Victor Stinner, Thomas Wouters, Steve Dower, Ned Deily, and Mark Dickinson. + +Notes on the backport to Python 3.6 in RHEL: + +* Use "Python 3.6.8-48" version in the documentation, whereas this + version will never be released +* Only add _Py_global_config_int_max_str_digits global variable: + Python 3.6 doesn't have PyConfig API (PEP 597) nor _PyRuntime. +* sys.flags.int_max_str_digits cannot be -1 on Python 3.6: it is + set to the default limit. Adapt test_int_max_str_digits() for that. +* Declare _PY_LONG_DEFAULT_MAX_STR_DIGITS and + _PY_LONG_MAX_STR_DIGITS_THRESHOLD macros in longobject.h but only + if the Py_BUILD_CORE macro is defined. +* Declare _Py_global_config_int_max_str_digits in pydebug.h. + +(cherry picked from commit 511ca9452033ef95bc7d7fc404b8161068226002) + +gh-95778: Mention sys.set_int_max_str_digits() in error message (#96874) + +When ValueError is raised if an integer is larger than the limit, +mention sys.set_int_max_str_digits() in the error message. + +(cherry picked from commit e841ffc915e82e5ea6e3b473205417d63494808d) + +gh-96848: Fix -X int_max_str_digits option parsing (#96988) + +Fix command line parsing: reject "-X int_max_str_digits" option with +no value (invalid) when the PYTHONINTMAXSTRDIGITS environment +variable is set to a valid limit. + +(cherry picked from commit 41351662bcd21672d8ccfa62fe44d72027e6bcf8) +--- + Doc/library/functions.rst | 8 ++ + Doc/library/json.rst | 11 ++ + Doc/library/stdtypes.rst | 159 ++++++++++++++++++++++++ + Doc/library/sys.rst | 53 ++++++-- + Doc/library/test.rst | 10 ++ + Doc/using/cmdline.rst | 14 +++ + Doc/whatsnew/3.6.rst | 15 +++ + Include/longobject.h | 38 ++++++ + Include/pydebug.h | 2 + + Lib/test/support/__init__.py | 10 ++ + Lib/test/test_ast.py | 8 ++ + Lib/test/test_cmd_line.py | 35 ++++++ + Lib/test/test_compile.py | 13 ++ + Lib/test/test_decimal.py | 18 +++ + Lib/test/test_int.py | 196 ++++++++++++++++++++++++++++++ + Lib/test/test_json/test_decode.py | 8 ++ + Lib/test/test_sys.py | 11 +- + Lib/test/test_xmlrpc.py | 10 ++ + Modules/main.c | 7 ++ + Objects/longobject.c | 168 ++++++++++++++++++++++++- + Python/ast.c | 26 +++- + Python/pylifecycle.c | 2 + + Python/sysmodule.c | 46 ++++++- + 23 files changed, 853 insertions(+), 15 deletions(-) + +diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst +index bc528dd..b0806b2 100644 +--- a/Doc/library/functions.rst ++++ b/Doc/library/functions.rst +@@ -748,6 +748,14 @@ are always available. They are listed here in alphabetical order. + .. versionchanged:: 3.6 + Grouping digits with underscores as in code literals is allowed. + ++ .. versionchanged:: 3.6.8-48 ++ :class:`int` string inputs and string representations can be limited to ++ help avoid denial of service attacks. A :exc:`ValueError` is raised when ++ the limit is exceeded while converting a string *x* to an :class:`int` or ++ when converting an :class:`int` into a string would exceed the limit. ++ See the :ref:`integer string conversion length limitation ++ ` documentation. ++ + + .. function:: isinstance(object, classinfo) + +diff --git a/Doc/library/json.rst b/Doc/library/json.rst +index 98ca86e..330e53f 100644 +--- a/Doc/library/json.rst ++++ b/Doc/library/json.rst +@@ -18,6 +18,11 @@ is a lightweight data interchange format inspired by + `JavaScript `_ object literal syntax + (although it is not a strict subset of JavaScript [#rfc-errata]_ ). + ++.. warning:: ++ Be cautious when parsing JSON data from untrusted sources. A malicious ++ JSON string may cause the decoder to consume considerable CPU and memory ++ resources. Limiting the size of data to be parsed is recommended. ++ + :mod:`json` exposes an API familiar to users of the standard library + :mod:`marshal` and :mod:`pickle` modules. + +@@ -245,6 +250,12 @@ Basic Usage + be used to use another datatype or parser for JSON integers + (e.g. :class:`float`). + ++ .. versionchanged:: 3.6.8-48 ++ The default *parse_int* of :func:`int` now limits the maximum length of ++ the integer string via the interpreter's :ref:`integer string ++ conversion length limitation ` to help avoid denial ++ of service attacks. ++ + *parse_constant*, if specified, will be called with one of the following + strings: ``'-Infinity'``, ``'Infinity'``, ``'NaN'``. + This can be used to raise an exception if invalid JSON numbers +diff --git a/Doc/library/stdtypes.rst b/Doc/library/stdtypes.rst +index 00e1f4c..1dc3253 100644 +--- a/Doc/library/stdtypes.rst ++++ b/Doc/library/stdtypes.rst +@@ -4671,6 +4671,165 @@ types, where they are relevant. Some of these are not reported by the + [] + + ++.. _int_max_str_digits: ++ ++Integer string conversion length limitation ++=========================================== ++ ++CPython has a global limit for converting between :class:`int` and :class:`str` ++to mitigate denial of service attacks. This limit *only* applies to decimal or ++other non-power-of-two number bases. Hexadecimal, octal, and binary conversions ++are unlimited. The limit can be configured. ++ ++The :class:`int` type in CPython is an abitrary length number stored in binary ++form (commonly known as a "bignum"). There exists no algorithm that can convert ++a string to a binary integer or a binary integer to a string in linear time, ++*unless* the base is a power of 2. Even the best known algorithms for base 10 ++have sub-quadratic complexity. Converting a large value such as ``int('1' * ++500_000)`` can take over a second on a fast CPU. ++ ++Limiting conversion size offers a practical way to avoid `CVE-2020-10735 ++`_. ++ ++The limit is applied to the number of digit characters in the input or output ++string when a non-linear conversion algorithm would be involved. Underscores ++and the sign are not counted towards the limit. ++ ++When an operation would exceed the limit, a :exc:`ValueError` is raised: ++ ++.. doctest:: ++ ++ >>> import sys ++ >>> sys.set_int_max_str_digits(4300) # Illustrative, this is the default. ++ >>> _ = int('2' * 5432) ++ Traceback (most recent call last): ++ ... ++ ValueError: Exceeds the limit (4300) for integer string conversion: value has 5432 digits; use sys.set_int_max_str_digits() to increase the limit. ++ >>> i = int('2' * 4300) ++ >>> len(str(i)) ++ 4300 ++ >>> i_squared = i*i ++ >>> len(str(i_squared)) ++ Traceback (most recent call last): ++ ... ++ ValueError: Exceeds the limit (4300) for integer string conversion: value has 8599 digits; use sys.set_int_max_str_digits() to increase the limit. ++ >>> len(hex(i_squared)) ++ 7144 ++ >>> assert int(hex(i_squared), base=16) == i*i # Hexadecimal is unlimited. ++ ++The default limit is 4300 digits as provided in ++:data:`sys.int_info.default_max_str_digits `. ++The lowest limit that can be configured is 640 digits as provided in ++:data:`sys.int_info.str_digits_check_threshold `. ++ ++Verification: ++ ++.. doctest:: ++ ++ >>> import sys ++ >>> assert sys.int_info.default_max_str_digits == 4300, sys.int_info ++ >>> assert sys.int_info.str_digits_check_threshold == 640, sys.int_info ++ >>> msg = int('578966293710682886880994035146873798396722250538762761564' ++ ... '9252925514383915483333812743580549779436104706260696366600' ++ ... '571186405732').to_bytes(53, 'big') ++ ... ++ ++.. versionadded:: 3.6.8-48 ++ ++Affected APIs ++------------- ++ ++The limitation only applies to potentially slow conversions between :class:`int` ++and :class:`str` or :class:`bytes`: ++ ++* ``int(string)`` with default base 10. ++* ``int(string, base)`` for all bases that are not a power of 2. ++* ``str(integer)``. ++* ``repr(integer)`` ++* any other string conversion to base 10, for example ``f"{integer}"``, ++ ``"{}".format(integer)``, or ``b"%d" % integer``. ++ ++The limitations do not apply to functions with a linear algorithm: ++ ++* ``int(string, base)`` with base 2, 4, 8, 16, or 32. ++* :func:`int.from_bytes` and :func:`int.to_bytes`. ++* :func:`hex`, :func:`oct`, :func:`bin`. ++* :ref:`formatspec` for hex, octal, and binary numbers. ++* :class:`str` to :class:`float`. ++* :class:`str` to :class:`decimal.Decimal`. ++ ++Configuring the limit ++--------------------- ++ ++Before Python starts up you can use an environment variable or an interpreter ++command line flag to configure the limit: ++ ++* :envvar:`PYTHONINTMAXSTRDIGITS`, e.g. ++ ``PYTHONINTMAXSTRDIGITS=640 python3`` to set the limit to 640 or ++ ``PYTHONINTMAXSTRDIGITS=0 python3`` to disable the limitation. ++* :option:`-X int_max_str_digits <-X>`, e.g. ++ ``python3 -X int_max_str_digits=640`` ++* :data:`sys.flags.int_max_str_digits` contains the value of ++ :envvar:`PYTHONINTMAXSTRDIGITS` or :option:`-X int_max_str_digits <-X>`. ++ If both the env var and the ``-X`` option are set, the ``-X`` option takes ++ precedence. A value of *-1* indicates that both were unset, thus a value of ++ :data:`sys.int_info.default_max_str_digits` was used during initilization. ++ ++From code, you can inspect the current limit and set a new one using these ++:mod:`sys` APIs: ++ ++* :func:`sys.get_int_max_str_digits` and :func:`sys.set_int_max_str_digits` are ++ a getter and setter for the interpreter-wide limit. Subinterpreters have ++ their own limit. ++ ++Information about the default and minimum can be found in :attr:`sys.int_info`: ++ ++* :data:`sys.int_info.default_max_str_digits ` is the compiled-in ++ default limit. ++* :data:`sys.int_info.str_digits_check_threshold ` is the lowest ++ accepted value for the limit (other than 0 which disables it). ++ ++.. versionadded:: 3.6.8-48 ++ ++.. caution:: ++ ++ Setting a low limit *can* lead to problems. While rare, code exists that ++ contains integer constants in decimal in their source that exceed the ++ minimum threshold. A consequence of setting the limit is that Python source ++ code containing decimal integer literals longer than the limit will ++ encounter an error during parsing, usually at startup time or import time or ++ even at installation time - anytime an up to date ``.pyc`` does not already ++ exist for the code. A workaround for source that contains such large ++ constants is to convert them to ``0x`` hexadecimal form as it has no limit. ++ ++ Test your application thoroughly if you use a low limit. Ensure your tests ++ run with the limit set early via the environment or flag so that it applies ++ during startup and even during any installation step that may invoke Python ++ to precompile ``.py`` sources to ``.pyc`` files. ++ ++Recommended configuration ++------------------------- ++ ++The default :data:`sys.int_info.default_max_str_digits` is expected to be ++reasonable for most applications. If your application requires a different ++limit, set it from your main entry point using Python version agnostic code as ++these APIs were added in security patch releases in versions before 3.11. ++ ++Example:: ++ ++ >>> import sys ++ >>> if hasattr(sys, "set_int_max_str_digits"): ++ ... upper_bound = 68000 ++ ... lower_bound = 4004 ++ ... current_limit = sys.get_int_max_str_digits() ++ ... if current_limit == 0 or current_limit > upper_bound: ++ ... sys.set_int_max_str_digits(upper_bound) ++ ... elif current_limit < lower_bound: ++ ... sys.set_int_max_str_digits(lower_bound) ++ ++If you need to disable it entirely, set it to ``0``. ++ ++ + .. rubric:: Footnotes + + .. [1] Additional information on these special methods may be found in the Python +diff --git a/Doc/library/sys.rst b/Doc/library/sys.rst +index 9198466..6144f8f 100644 +--- a/Doc/library/sys.rst ++++ b/Doc/library/sys.rst +@@ -296,6 +296,7 @@ always available. + :const:`bytes_warning` :option:`-b` + :const:`quiet` :option:`-q` + :const:`hash_randomization` :option:`-R` ++ :const:`int_max_str_digits` :option:`-X int_max_str_digits <-X>` (:ref:`integer string conversion length limitation `) + ============================= ============================= + + .. versionchanged:: 3.2 +@@ -310,6 +311,9 @@ always available. + .. versionchanged:: 3.4 + Added ``isolated`` attribute for :option:`-I` ``isolated`` flag. + ++ .. versionchanged:: 3.6.8-48 ++ Added the ``int_max_str_digits`` attribute. ++ + .. data:: float_info + + A :term:`struct sequence` holding information about the float type. It +@@ -468,6 +472,15 @@ always available. + + .. versionadded:: 3.6 + ++ ++.. function:: get_int_max_str_digits() ++ ++ Returns the current value for the :ref:`integer string conversion length ++ limitation `. See also :func:`set_int_max_str_digits`. ++ ++ .. versionadded:: 3.6.8-48 ++ ++ + .. function:: getrefcount(object) + + Return the reference count of the *object*. The count returned is generally one +@@ -730,19 +743,31 @@ always available. + + .. tabularcolumns:: |l|L| + +- +-------------------------+----------------------------------------------+ +- | Attribute | Explanation | +- +=========================+==============================================+ +- | :const:`bits_per_digit` | number of bits held in each digit. Python | +- | | integers are stored internally in base | +- | | ``2**int_info.bits_per_digit`` | +- +-------------------------+----------------------------------------------+ +- | :const:`sizeof_digit` | size in bytes of the C type used to | +- | | represent a digit | +- +-------------------------+----------------------------------------------+ ++ +----------------------------------------+-----------------------------------------------+ ++ | Attribute | Explanation | ++ +========================================+===============================================+ ++ | :const:`bits_per_digit` | number of bits held in each digit. Python | ++ | | integers are stored internally in base | ++ | | ``2**int_info.bits_per_digit`` | ++ +----------------------------------------+-----------------------------------------------+ ++ | :const:`sizeof_digit` | size in bytes of the C type used to | ++ | | represent a digit | ++ +----------------------------------------+-----------------------------------------------+ ++ | :const:`default_max_str_digits` | default value for | ++ | | :func:`sys.get_int_max_str_digits` when it | ++ | | is not otherwise explicitly configured. | ++ +----------------------------------------+-----------------------------------------------+ ++ | :const:`str_digits_check_threshold` | minimum non-zero value for | ++ | | :func:`sys.set_int_max_str_digits`, | ++ | | :envvar:`PYTHONINTMAXSTRDIGITS`, or | ++ | | :option:`-X int_max_str_digits <-X>`. | ++ +----------------------------------------+-----------------------------------------------+ + + .. versionadded:: 3.1 + ++ .. versionchanged:: 3.6.8-48 ++ Added ``default_max_str_digits`` and ``str_digits_check_threshold``. ++ + + .. data:: __interactivehook__ + +@@ -1001,6 +1026,14 @@ always available. + + Availability: Unix. + ++.. function:: set_int_max_str_digits(n) ++ ++ Set the :ref:`integer string conversion length limitation ++ ` used by this interpreter. See also ++ :func:`get_int_max_str_digits`. ++ ++ .. versionadded:: 3.6.8-48 ++ + .. function:: setprofile(profilefunc) + + .. index:: +diff --git a/Doc/library/test.rst b/Doc/library/test.rst +index 04d6cd8..5153162 100644 +--- a/Doc/library/test.rst ++++ b/Doc/library/test.rst +@@ -625,6 +625,16 @@ The :mod:`test.support` module defines the following functions: + .. versionadded:: 3.6 + + ++.. function:: adjust_int_max_str_digits(max_digits) ++ ++ This function returns a context manager that will change the global ++ :func:`sys.set_int_max_str_digits` setting for the duration of the ++ context to allow execution of test code that needs a different limit ++ on the number of digits when converting between an integer and string. ++ ++ .. versionadded:: 3.6.8-48 ++ ++ + The :mod:`test.support` module defines the following classes: + + .. class:: TransientResource(exc, **kwargs) +diff --git a/Doc/using/cmdline.rst b/Doc/using/cmdline.rst +index 65aa3ad..f5f76c4 100644 +--- a/Doc/using/cmdline.rst ++++ b/Doc/using/cmdline.rst +@@ -422,6 +422,9 @@ Miscellaneous options + * ``-X showalloccount`` to output the total count of allocated objects for + each type when the program finishes. This only works when Python was built with + ``COUNT_ALLOCS`` defined. ++ * ``-X int_max_str_digits`` configures the :ref:`integer string conversion ++ length limitation `. See also ++ :envvar:`PYTHONINTMAXSTRDIGITS`. + + It also allows passing arbitrary values and retrieving them through the + :data:`sys._xoptions` dictionary. +@@ -438,6 +441,9 @@ Miscellaneous options + .. versionadded:: 3.6 + The ``-X showalloccount`` option. + ++ .. versionadded:: 3.6.8-48 ++ The ``-X int_max_str_digits`` option. ++ + + Options you shouldn't use + ~~~~~~~~~~~~~~~~~~~~~~~~~ +@@ -571,6 +577,14 @@ conflict. + .. versionadded:: 3.2.3 + + ++.. envvar:: PYTHONINTMAXSTRDIGITS ++ ++ If this variable is set to an integer, it is used to configure the ++ interpreter's global :ref:`integer string conversion length limitation ++ `. ++ ++ .. versionadded:: 3.6.8-48 ++ + .. envvar:: PYTHONIOENCODING + + If this is set before running the interpreter, it overrides the encoding used +diff --git a/Doc/whatsnew/3.6.rst b/Doc/whatsnew/3.6.rst +index 0095844..d669c5c 100644 +--- a/Doc/whatsnew/3.6.rst ++++ b/Doc/whatsnew/3.6.rst +@@ -2438,3 +2438,18 @@ In 3.6.7 the :mod:`tokenize` module now implicitly emits a ``NEWLINE`` token + when provided with input that does not have a trailing new line. This behavior + now matches what the C tokenizer does internally. + (Contributed by Ammar Askar in :issue:`33899`.) ++ ++ ++Notable security feature in 3.6.8-48 ++===================================== ++ ++Converting between :class:`int` and :class:`str` in bases other than 2 ++(binary), 4, 8 (octal), 16 (hexadecimal), or 32 such as base 10 (decimal) ++now raises a :exc:`ValueError` if the number of digits in string form is ++above a limit to avoid potential denial of service attacks due to the ++algorithmic complexity. This is a mitigation for `CVE-2020-10735 ++`_. ++This limit can be configured or disabled by environment variable, command ++line flag, or :mod:`sys` APIs. See the :ref:`integer string conversion ++length limitation ` documentation. The default limit ++is 4300 digits in string form. +diff --git a/Include/longobject.h b/Include/longobject.h +index efd409c..d8a080a 100644 +--- a/Include/longobject.h ++++ b/Include/longobject.h +@@ -209,6 +209,44 @@ PyAPI_FUNC(long) PyOS_strtol(const char *, char **, int); + PyAPI_FUNC(PyObject *) _PyLong_GCD(PyObject *, PyObject *); + #endif /* !Py_LIMITED_API */ + ++#ifdef Py_BUILD_CORE ++/* ++ * Default int base conversion size limitation: Denial of Service prevention. ++ * ++ * Chosen such that this isn't wildly slow on modern hardware and so that ++ * everyone's existing deployed numpy test suite passes before ++ * https://github.com/numpy/numpy/issues/22098 is widely available. ++ * ++ * $ python -m timeit -s 's = "1"*4300' 'int(s)' ++ * 2000 loops, best of 5: 125 usec per loop ++ * $ python -m timeit -s 's = "1"*4300; v = int(s)' 'str(v)' ++ * 1000 loops, best of 5: 311 usec per loop ++ * (zen2 cloud VM) ++ * ++ * 4300 decimal digits fits a ~14284 bit number. ++ */ ++#define _PY_LONG_DEFAULT_MAX_STR_DIGITS 4300 ++/* ++ * Threshold for max digits check. For performance reasons int() and ++ * int.__str__() don't checks values that are smaller than this ++ * threshold. Acts as a guaranteed minimum size limit for bignums that ++ * applications can expect from CPython. ++ * ++ * % python -m timeit -s 's = "1"*640; v = int(s)' 'str(int(s))' ++ * 20000 loops, best of 5: 12 usec per loop ++ * ++ * "640 digits should be enough for anyone." - gps ++ * fits a ~2126 bit decimal number. ++ */ ++#define _PY_LONG_MAX_STR_DIGITS_THRESHOLD 640 ++ ++#if ((_PY_LONG_DEFAULT_MAX_STR_DIGITS != 0) && \ ++ (_PY_LONG_DEFAULT_MAX_STR_DIGITS < _PY_LONG_MAX_STR_DIGITS_THRESHOLD)) ++# error "_PY_LONG_DEFAULT_MAX_STR_DIGITS smaller than threshold." ++#endif ++ ++#endif /* Py_BUILD_CORE */ ++ + #ifdef __cplusplus + } + #endif +diff --git a/Include/pydebug.h b/Include/pydebug.h +index 6e23a89..657c552 100644 +--- a/Include/pydebug.h ++++ b/Include/pydebug.h +@@ -28,6 +28,8 @@ PyAPI_DATA(int) Py_IsolatedFlag; + PyAPI_DATA(int) Py_LegacyWindowsStdioFlag; + #endif + ++PyAPI_DATA(int) _Py_global_config_int_max_str_digits; ++ + /* this is a wrapper around getenv() that pays attention to + Py_IgnoreEnvironmentFlag. It should be used for getting variables like + PYTHONPATH and PYTHONHOME from the environment */ +diff --git a/Lib/test/support/__init__.py b/Lib/test/support/__init__.py +index e33096e..99920ac 100644 +--- a/Lib/test/support/__init__.py ++++ b/Lib/test/support/__init__.py +@@ -2912,3 +2912,13 @@ class FakePath: + raise self.path + else: + return self.path ++ ++@contextlib.contextmanager ++def adjust_int_max_str_digits(max_digits): ++ """Temporarily change the integer string conversion length limit.""" ++ current = sys.get_int_max_str_digits() ++ try: ++ sys.set_int_max_str_digits(max_digits) ++ yield ++ finally: ++ sys.set_int_max_str_digits(current) +diff --git a/Lib/test/test_ast.py b/Lib/test/test_ast.py +index e68d0de..7f2d793 100644 +--- a/Lib/test/test_ast.py ++++ b/Lib/test/test_ast.py +@@ -571,6 +571,14 @@ class ASTHelpers_Test(unittest.TestCase): + exec(code, ns) + self.assertIn('sleep', ns) + ++ def test_literal_eval_str_int_limit(self): ++ with support.adjust_int_max_str_digits(4000): ++ ast.literal_eval('3'*4000) # no error ++ with self.assertRaises(SyntaxError) as err_ctx: ++ ast.literal_eval('3'*4001) ++ self.assertIn('Exceeds the limit ', str(err_ctx.exception)) ++ self.assertIn(' Consider hexadecimal ', str(err_ctx.exception)) ++ + + class ASTValidatorTests(unittest.TestCase): + +diff --git a/Lib/test/test_cmd_line.py b/Lib/test/test_cmd_line.py +index 5922ed9..fe456ee 100644 +--- a/Lib/test/test_cmd_line.py ++++ b/Lib/test/test_cmd_line.py +@@ -502,6 +502,41 @@ class CmdLineTest(unittest.TestCase): + self.assertEqual(proc.returncode, 0, proc) + self.assertEqual(proc.stdout.strip(), b'0') + ++ def test_int_max_str_digits(self): ++ code = "import sys; print(sys.flags.int_max_str_digits, sys.get_int_max_str_digits())" ++ ++ assert_python_failure('-X', 'int_max_str_digits', '-c', code) ++ assert_python_failure('-X', 'int_max_str_digits=foo', '-c', code) ++ assert_python_failure('-X', 'int_max_str_digits=100', '-c', code) ++ assert_python_failure('-X', 'int_max_str_digits', '-c', code, ++ PYTHONINTMAXSTRDIGITS='4000') ++ ++ assert_python_failure('-c', code, PYTHONINTMAXSTRDIGITS='foo') ++ assert_python_failure('-c', code, PYTHONINTMAXSTRDIGITS='100') ++ ++ def res2int(res): ++ out = res.out.strip().decode("utf-8") ++ return tuple(int(i) for i in out.split()) ++ ++ res = assert_python_ok('-c', code) ++ self.assertEqual(res2int(res), (sys.get_int_max_str_digits(), sys.get_int_max_str_digits())) ++ res = assert_python_ok('-X', 'int_max_str_digits=0', '-c', code) ++ self.assertEqual(res2int(res), (0, 0)) ++ res = assert_python_ok('-X', 'int_max_str_digits=4000', '-c', code) ++ self.assertEqual(res2int(res), (4000, 4000)) ++ res = assert_python_ok('-X', 'int_max_str_digits=100000', '-c', code) ++ self.assertEqual(res2int(res), (100000, 100000)) ++ ++ res = assert_python_ok('-c', code, PYTHONINTMAXSTRDIGITS='0') ++ self.assertEqual(res2int(res), (0, 0)) ++ res = assert_python_ok('-c', code, PYTHONINTMAXSTRDIGITS='4000') ++ self.assertEqual(res2int(res), (4000, 4000)) ++ res = assert_python_ok( ++ '-X', 'int_max_str_digits=6000', '-c', code, ++ PYTHONINTMAXSTRDIGITS='4000' ++ ) ++ self.assertEqual(res2int(res), (6000, 6000)) ++ + + def test_main(): + test.support.run_unittest(CmdLineTest) +diff --git a/Lib/test/test_compile.py b/Lib/test/test_compile.py +index 13cc882..00e6468 100644 +--- a/Lib/test/test_compile.py ++++ b/Lib/test/test_compile.py +@@ -189,6 +189,19 @@ if 1: + self.assertEqual(eval("0o777"), 511) + self.assertEqual(eval("-0o0000010"), -8) + ++ def test_int_literals_too_long(self): ++ n = 3000 ++ source = f"a = 1\nb = 2\nc = {'3'*n}\nd = 4" ++ with support.adjust_int_max_str_digits(n): ++ compile(source, "", "exec") # no errors. ++ with support.adjust_int_max_str_digits(n-1): ++ with self.assertRaises(SyntaxError) as err_ctx: ++ compile(source, "", "exec") ++ exc = err_ctx.exception ++ self.assertEqual(exc.lineno, 3) ++ self.assertIn('Exceeds the limit ', str(exc)) ++ self.assertIn(' Consider hexadecimal ', str(exc)) ++ + def test_unary_minus(self): + # Verify treatment of unary minus on negative numbers SF bug #660455 + if sys.maxsize == 2147483647: +diff --git a/Lib/test/test_decimal.py b/Lib/test/test_decimal.py +index 8808a67..4459b82 100644 +--- a/Lib/test/test_decimal.py ++++ b/Lib/test/test_decimal.py +@@ -2442,6 +2442,15 @@ class CUsabilityTest(UsabilityTest): + class PyUsabilityTest(UsabilityTest): + decimal = P + ++ def setUp(self): ++ super().setUp() ++ self._previous_int_limit = sys.get_int_max_str_digits() ++ sys.set_int_max_str_digits(7000) ++ ++ def tearDown(self): ++ sys.set_int_max_str_digits(self._previous_int_limit) ++ super().tearDown() ++ + class PythonAPItests(unittest.TestCase): + + def test_abc(self): +@@ -4499,6 +4508,15 @@ class CCoverage(Coverage): + class PyCoverage(Coverage): + decimal = P + ++ def setUp(self): ++ super().setUp() ++ self._previous_int_limit = sys.get_int_max_str_digits() ++ sys.set_int_max_str_digits(7000) ++ ++ def tearDown(self): ++ sys.set_int_max_str_digits(self._previous_int_limit) ++ super().tearDown() ++ + class PyFunctionality(unittest.TestCase): + """Extra functionality in decimal.py""" + +diff --git a/Lib/test/test_int.py b/Lib/test/test_int.py +index a36076e..6cd9a5e 100644 +--- a/Lib/test/test_int.py ++++ b/Lib/test/test_int.py +@@ -1,4 +1,5 @@ + import sys ++import time + + import unittest + from test import support +@@ -514,5 +515,200 @@ class IntTestCases(unittest.TestCase): + self.assertEqual(int('1_2_3_4_5_6_7', 32), 1144132807) + + ++class IntStrDigitLimitsTests(unittest.TestCase): ++ ++ int_class = int # Override this in subclasses to reuse the suite. ++ ++ def setUp(self): ++ super().setUp() ++ self._previous_limit = sys.get_int_max_str_digits() ++ sys.set_int_max_str_digits(2048) ++ ++ def tearDown(self): ++ sys.set_int_max_str_digits(self._previous_limit) ++ super().tearDown() ++ ++ def test_disabled_limit(self): ++ self.assertGreater(sys.get_int_max_str_digits(), 0) ++ self.assertLess(sys.get_int_max_str_digits(), 20_000) ++ with support.adjust_int_max_str_digits(0): ++ self.assertEqual(sys.get_int_max_str_digits(), 0) ++ i = self.int_class('1' * 20_000) ++ str(i) ++ self.assertGreater(sys.get_int_max_str_digits(), 0) ++ ++ def test_max_str_digits_edge_cases(self): ++ """Ignore the +/- sign and space padding.""" ++ int_class = self.int_class ++ maxdigits = sys.get_int_max_str_digits() ++ ++ int_class('1' * maxdigits) ++ int_class(' ' + '1' * maxdigits) ++ int_class('1' * maxdigits + ' ') ++ int_class('+' + '1' * maxdigits) ++ int_class('-' + '1' * maxdigits) ++ self.assertEqual(len(str(10 ** (maxdigits - 1))), maxdigits) ++ ++ def check(self, i, base=None): ++ with self.assertRaises(ValueError): ++ if base is None: ++ self.int_class(i) ++ else: ++ self.int_class(i, base) ++ ++ def test_max_str_digits(self): ++ maxdigits = sys.get_int_max_str_digits() ++ ++ self.check('1' * (maxdigits + 1)) ++ self.check(' ' + '1' * (maxdigits + 1)) ++ self.check('1' * (maxdigits + 1) + ' ') ++ self.check('+' + '1' * (maxdigits + 1)) ++ self.check('-' + '1' * (maxdigits + 1)) ++ self.check('1' * (maxdigits + 1)) ++ ++ i = 10 ** maxdigits ++ with self.assertRaises(ValueError): ++ str(i) ++ ++ def test_denial_of_service_prevented_int_to_str(self): ++ """Regression test: ensure we fail before performing O(N**2) work.""" ++ maxdigits = sys.get_int_max_str_digits() ++ assert maxdigits < 50_000, maxdigits # A test prerequisite. ++ get_time = time.process_time ++ if get_time() <= 0: # some platforms like WASM lack process_time() ++ get_time = time.monotonic ++ ++ huge_int = int(f'0x{"c"*65_000}', base=16) # 78268 decimal digits. ++ digits = 78_268 ++ with support.adjust_int_max_str_digits(digits): ++ start = get_time() ++ huge_decimal = str(huge_int) ++ seconds_to_convert = get_time() - start ++ self.assertEqual(len(huge_decimal), digits) ++ # Ensuring that we chose a slow enough conversion to measure. ++ # It takes 0.1 seconds on a Zen based cloud VM in an opt build. ++ if seconds_to_convert < 0.005: ++ raise unittest.SkipTest('"slow" conversion took only ' ++ f'{seconds_to_convert} seconds.') ++ ++ # We test with the limit almost at the size needed to check performance. ++ # The performant limit check is slightly fuzzy, give it a some room. ++ with support.adjust_int_max_str_digits(int(.995 * digits)): ++ with self.assertRaises(ValueError) as err: ++ start = get_time() ++ str(huge_int) ++ seconds_to_fail_huge = get_time() - start ++ self.assertIn('conversion', str(err.exception)) ++ self.assertLess(seconds_to_fail_huge, seconds_to_convert/8) ++ ++ # Now we test that a conversion that would take 30x as long also fails ++ # in a similarly fast fashion. ++ extra_huge_int = int(f'0x{"c"*500_000}', base=16) # 602060 digits. ++ with self.assertRaises(ValueError) as err: ++ start = get_time() ++ # If not limited, 8 seconds said Zen based cloud VM. ++ str(extra_huge_int) ++ seconds_to_fail_extra_huge = get_time() - start ++ self.assertIn('conversion', str(err.exception)) ++ self.assertLess(seconds_to_fail_extra_huge, seconds_to_convert/8) ++ ++ def test_denial_of_service_prevented_str_to_int(self): ++ """Regression test: ensure we fail before performing O(N**2) work.""" ++ maxdigits = sys.get_int_max_str_digits() ++ assert maxdigits < 100_000, maxdigits # A test prerequisite. ++ get_time = time.process_time ++ if get_time() <= 0: # some platforms like WASM lack process_time() ++ get_time = time.monotonic ++ ++ digits = 133700 ++ huge = '8'*digits ++ with support.adjust_int_max_str_digits(digits): ++ start = get_time() ++ int(huge) ++ seconds_to_convert = get_time() - start ++ # Ensuring that we chose a slow enough conversion to measure. ++ # It takes 0.1 seconds on a Zen based cloud VM in an opt build. ++ if seconds_to_convert < 0.005: ++ raise unittest.SkipTest('"slow" conversion took only ' ++ f'{seconds_to_convert} seconds.') ++ ++ with support.adjust_int_max_str_digits(digits - 1): ++ with self.assertRaises(ValueError) as err: ++ start = get_time() ++ int(huge) ++ seconds_to_fail_huge = get_time() - start ++ self.assertIn('conversion', str(err.exception)) ++ self.assertLess(seconds_to_fail_huge, seconds_to_convert/8) ++ ++ # Now we test that a conversion that would take 30x as long also fails ++ # in a similarly fast fashion. ++ extra_huge = '7'*1_200_000 ++ with self.assertRaises(ValueError) as err: ++ start = get_time() ++ # If not limited, 8 seconds in the Zen based cloud VM. ++ int(extra_huge) ++ seconds_to_fail_extra_huge = get_time() - start ++ self.assertIn('conversion', str(err.exception)) ++ self.assertLess(seconds_to_fail_extra_huge, seconds_to_convert/8) ++ ++ def test_power_of_two_bases_unlimited(self): ++ """The limit does not apply to power of 2 bases.""" ++ maxdigits = sys.get_int_max_str_digits() ++ ++ for base in (2, 4, 8, 16, 32): ++ with self.subTest(base=base): ++ self.int_class('1' * (maxdigits + 1), base) ++ assert maxdigits < 100_000 ++ self.int_class('1' * 100_000, base) ++ ++ def test_underscores_ignored(self): ++ maxdigits = sys.get_int_max_str_digits() ++ ++ triples = maxdigits // 3 ++ s = '111' * triples ++ s_ = '1_11' * triples ++ self.int_class(s) # succeeds ++ self.int_class(s_) # succeeds ++ self.check(f'{s}111') ++ self.check(f'{s_}_111') ++ ++ def test_sign_not_counted(self): ++ int_class = self.int_class ++ max_digits = sys.get_int_max_str_digits() ++ s = '5' * max_digits ++ i = int_class(s) ++ pos_i = int_class(f'+{s}') ++ assert i == pos_i ++ neg_i = int_class(f'-{s}') ++ assert -pos_i == neg_i ++ str(pos_i) ++ str(neg_i) ++ ++ def _other_base_helper(self, base): ++ int_class = self.int_class ++ max_digits = sys.get_int_max_str_digits() ++ s = '2' * max_digits ++ i = int_class(s, base) ++ if base > 10: ++ with self.assertRaises(ValueError): ++ str(i) ++ elif base < 10: ++ str(i) ++ with self.assertRaises(ValueError) as err: ++ int_class(f'{s}1', base) ++ ++ def test_int_from_other_bases(self): ++ base = 3 ++ with self.subTest(base=base): ++ self._other_base_helper(base) ++ base = 36 ++ with self.subTest(base=base): ++ self._other_base_helper(base) ++ ++ ++class IntSubclassStrDigitLimitsTests(IntStrDigitLimitsTests): ++ int_class = IntSubclass ++ ++ + if __name__ == "__main__": + unittest.main() +diff --git a/Lib/test/test_json/test_decode.py b/Lib/test/test_json/test_decode.py +index 738f109..b5fd4f2 100644 +--- a/Lib/test/test_json/test_decode.py ++++ b/Lib/test/test_json/test_decode.py +@@ -2,6 +2,7 @@ import decimal + from io import StringIO, BytesIO + from collections import OrderedDict + from test.test_json import PyTest, CTest ++from test import support + + + class TestDecode: +@@ -95,5 +96,12 @@ class TestDecode: + d = self.json.JSONDecoder() + self.assertRaises(ValueError, d.raw_decode, 'a'*42, -50000) + ++ def test_limit_int(self): ++ maxdigits = 5000 ++ with support.adjust_int_max_str_digits(maxdigits): ++ self.loads('1' * maxdigits) ++ with self.assertRaises(ValueError): ++ self.loads('1' * (maxdigits + 1)) ++ + class TestPyDecode(TestDecode, PyTest): pass + class TestCDecode(TestDecode, CTest): pass +diff --git a/Lib/test/test_sys.py b/Lib/test/test_sys.py +index b41239a..f2b9e08 100644 +--- a/Lib/test/test_sys.py ++++ b/Lib/test/test_sys.py +@@ -444,11 +444,17 @@ class SysModuleTest(unittest.TestCase): + self.assertIsInstance(sys.executable, str) + self.assertEqual(len(sys.float_info), 11) + self.assertEqual(sys.float_info.radix, 2) +- self.assertEqual(len(sys.int_info), 2) ++ self.assertEqual(len(sys.int_info), 4) + self.assertTrue(sys.int_info.bits_per_digit % 5 == 0) + self.assertTrue(sys.int_info.sizeof_digit >= 1) ++ self.assertGreaterEqual(sys.int_info.default_max_str_digits, 500) ++ self.assertGreaterEqual(sys.int_info.str_digits_check_threshold, 100) ++ self.assertGreater(sys.int_info.default_max_str_digits, ++ sys.int_info.str_digits_check_threshold) + self.assertEqual(type(sys.int_info.bits_per_digit), int) + self.assertEqual(type(sys.int_info.sizeof_digit), int) ++ self.assertIsInstance(sys.int_info.default_max_str_digits, int) ++ self.assertIsInstance(sys.int_info.str_digits_check_threshold, int) + self.assertIsInstance(sys.hexversion, int) + + self.assertEqual(len(sys.hash_info), 9) +@@ -552,7 +558,8 @@ class SysModuleTest(unittest.TestCase): + attrs = ("debug", + "inspect", "interactive", "optimize", "dont_write_bytecode", + "no_user_site", "no_site", "ignore_environment", "verbose", +- "bytes_warning", "quiet", "hash_randomization", "isolated") ++ "bytes_warning", "quiet", "hash_randomization", "isolated", ++ "int_max_str_digits") + for attr in attrs: + self.assertTrue(hasattr(sys.flags, attr), attr) + self.assertEqual(type(getattr(sys.flags, attr)), int, attr) +diff --git a/Lib/test/test_xmlrpc.py b/Lib/test/test_xmlrpc.py +index fc601d4..58553dd 100644 +--- a/Lib/test/test_xmlrpc.py ++++ b/Lib/test/test_xmlrpc.py +@@ -286,6 +286,16 @@ class XMLRPCTestCase(unittest.TestCase): + check('9876543210.0123456789', + decimal.Decimal('9876543210.0123456789')) + ++ def test_limit_int(self): ++ check = self.check_loads ++ maxdigits = 5000 ++ with support.adjust_int_max_str_digits(maxdigits): ++ s = '1' * (maxdigits + 1) ++ with self.assertRaises(ValueError): ++ check(f'{s}', None) ++ with self.assertRaises(ValueError): ++ check(f'{s}', None) ++ + def test_get_host_info(self): + # see bug #3613, this raised a TypeError + transp = xmlrpc.client.Transport() +diff --git a/Modules/main.c b/Modules/main.c +index 96d8be4..405e883 100644 +--- a/Modules/main.c ++++ b/Modules/main.c +@@ -84,6 +84,9 @@ static const char usage_3[] = "\ + also PYTHONWARNINGS=arg\n\ + -x : skip first line of source, allowing use of non-Unix forms of #!cmd\n\ + -X opt : set implementation-specific option\n\ ++-X int_max_str_digits=number: limit the size of int<->str conversions.\n\ ++ This helps avoid denial of service attacks when parsing untrusted data.\n\ ++ The default is sys.int_info.default_max_str_digits. 0 disables.\n\ + "; + static const char usage_4[] = "\ + file : program read from script file\n\ +@@ -105,6 +108,10 @@ static const char usage_6[] = + " to seed the hashes of str, bytes and datetime objects. It can also be\n" + " set to an integer in the range [0,4294967295] to get hash values with a\n" + " predictable seed.\n" ++"PYTHONINTMAXSTRDIGITS: limits the maximum digit characters in an int value\n" ++" when converting from a string and when converting an int back to a str.\n" ++" A value of 0 disables the limit. Conversions to or from bases 2, 4, 8,\n" ++" 16, and 32 are never limited.\n" + "PYTHONMALLOC: set the Python memory allocators and/or install debug hooks\n" + " on Python memory allocators. Use PYTHONMALLOC=debug to install debug\n" + " hooks.\n" +diff --git a/Objects/longobject.c b/Objects/longobject.c +index 3864cec..ea01169 100644 +--- a/Objects/longobject.c ++++ b/Objects/longobject.c +@@ -33,6 +33,9 @@ static PyLongObject small_ints[NSMALLNEGINTS + NSMALLPOSINTS]; + Py_ssize_t quick_int_allocs, quick_neg_int_allocs; + #endif + ++#define _MAX_STR_DIGITS_ERROR_FMT_TO_INT "Exceeds the limit (%d) for integer string conversion: value has %zd digits; use sys.set_int_max_str_digits() to increase the limit" ++#define _MAX_STR_DIGITS_ERROR_FMT_TO_STR "Exceeds the limit (%d) for integer string conversion; use sys.set_int_max_str_digits() to increase the limit" ++ + static PyObject * + get_small_int(sdigit ival) + { +@@ -1593,6 +1596,22 @@ long_to_decimal_string_internal(PyObject *aa, + size_a = Py_ABS(Py_SIZE(a)); + negative = Py_SIZE(a) < 0; + ++ /* quick and dirty pre-check for overflowing the decimal digit limit, ++ based on the inequality 10/3 >= log2(10) ++ ++ explanation in https://github.com/python/cpython/pull/96537 ++ */ ++ if (size_a >= 10 * _PY_LONG_MAX_STR_DIGITS_THRESHOLD ++ / (3 * PyLong_SHIFT) + 2) { ++ int max_str_digits = _Py_global_config_int_max_str_digits ; ++ if ((max_str_digits > 0) && ++ (max_str_digits / (3 * PyLong_SHIFT) <= (size_a - 11) / 10)) { ++ PyErr_Format(PyExc_ValueError, _MAX_STR_DIGITS_ERROR_FMT_TO_STR, ++ max_str_digits); ++ return -1; ++ } ++ } ++ + /* quick and dirty upper bound for the number of digits + required to express a in base _PyLong_DECIMAL_BASE: + +@@ -1652,6 +1671,16 @@ long_to_decimal_string_internal(PyObject *aa, + tenpow *= 10; + strlen++; + } ++ if (strlen > _PY_LONG_MAX_STR_DIGITS_THRESHOLD) { ++ int max_str_digits = _Py_global_config_int_max_str_digits ; ++ Py_ssize_t strlen_nosign = strlen - negative; ++ if ((max_str_digits > 0) && (strlen_nosign > max_str_digits)) { ++ Py_DECREF(scratch); ++ PyErr_Format(PyExc_ValueError, _MAX_STR_DIGITS_ERROR_FMT_TO_STR, ++ max_str_digits); ++ return -1; ++ } ++ } + if (writer) { + if (_PyUnicodeWriter_Prepare(writer, strlen, '9') == -1) { + Py_DECREF(scratch); +@@ -2166,6 +2195,7 @@ PyLong_FromString(const char *str, char **pend, int base) + + start = str; + if ((base & (base - 1)) == 0) { ++ /* binary bases are not limited by int_max_str_digits */ + int res = long_from_binary_base(&str, base, &z); + if (res < 0) { + /* Syntax error. */ +@@ -2318,6 +2348,16 @@ digit beyond the first. + goto onError; + } + ++ /* Limit the size to avoid excessive computation attacks. */ ++ if (digits > _PY_LONG_MAX_STR_DIGITS_THRESHOLD) { ++ int max_str_digits = _Py_global_config_int_max_str_digits ; ++ if ((max_str_digits > 0) && (digits > max_str_digits)) { ++ PyErr_Format(PyExc_ValueError, _MAX_STR_DIGITS_ERROR_FMT_TO_INT, ++ max_str_digits, digits); ++ return NULL; ++ } ++ } ++ + /* Create an int object that can contain the largest possible + * integer with this base and length. Note that there's no + * need to initialize z->ob_digit -- no slot is read up before +@@ -4820,6 +4860,7 @@ long_new(PyTypeObject *type, PyObject *args, PyObject *kwds) + } + return PyLong_FromLong(0L); + } ++ /* default base and limit, forward to standard implementation */ + if (obase == NULL) + return PyNumber_Long(x); + +@@ -5482,6 +5523,8 @@ internal representation of integers. The attributes are read only."); + static PyStructSequence_Field int_info_fields[] = { + {"bits_per_digit", "size of a digit in bits"}, + {"sizeof_digit", "size in bytes of the C type used to represent a digit"}, ++ {"default_max_str_digits", "maximum string conversion digits limitation"}, ++ {"str_digits_check_threshold", "minimum positive value for int_max_str_digits"}, + {NULL, NULL} + }; + +@@ -5489,7 +5532,7 @@ static PyStructSequence_Desc int_info_desc = { + "sys.int_info", /* name */ + int_info__doc__, /* doc */ + int_info_fields, /* fields */ +- 2 /* number of fields */ ++ 4 /* number of fields */ + }; + + PyObject * +@@ -5504,6 +5547,17 @@ PyLong_GetInfo(void) + PyLong_FromLong(PyLong_SHIFT)); + PyStructSequence_SET_ITEM(int_info, field++, + PyLong_FromLong(sizeof(digit))); ++ /* ++ * The following two fields were added after investigating uses of ++ * sys.int_info in the wild: Exceedingly rarely used. The ONLY use found was ++ * numba using sys.int_info.bits_per_digit as attribute access rather than ++ * sequence unpacking. Cython and sympy also refer to sys.int_info but only ++ * as info for debugging. No concern about adding these in a backport. ++ */ ++ PyStructSequence_SET_ITEM(int_info, field++, ++ PyLong_FromLong(_PY_LONG_DEFAULT_MAX_STR_DIGITS)); ++ PyStructSequence_SET_ITEM(int_info, field++, ++ PyLong_FromLong(_PY_LONG_MAX_STR_DIGITS_THRESHOLD)); + if (PyErr_Occurred()) { + Py_CLEAR(int_info); + return NULL; +@@ -5511,6 +5565,116 @@ PyLong_GetInfo(void) + return int_info; + } + ++ ++static int ++pymain_str_to_int(const char *str, int *result) ++{ ++ errno = 0; ++ const char *endptr = str; ++ long value = strtol(str, (char **)&endptr, 10); ++ if (*endptr != '\0' || errno == ERANGE) { ++ return -1; ++ } ++ if (value < INT_MIN || value > INT_MAX) { ++ return -1; ++ } ++ ++ *result = (int)value; ++ return 0; ++} ++ ++ ++static int ++long_get_max_str_digits_xoption(int *pmaxdigits) ++{ ++ PyObject *xoptions = PySys_GetXOptions(); ++ if (xoptions == NULL) { ++ return -1; ++ } ++ ++ PyObject *key = PyUnicode_FromString("int_max_str_digits"); ++ if (key == NULL) { ++ return -1; ++ } ++ ++ PyObject *value = PyDict_GetItemWithError(xoptions, key); /* borrowed */ ++ Py_DECREF(key); ++ if (value == NULL) { ++ if (PyErr_Occurred()) { ++ return -1; ++ } ++ return 0; ++ } ++ ++ if (!PyUnicode_Check(value)) { ++ return -1; ++ } ++ ++ PyObject *valuelong = PyLong_FromUnicodeObject(value, 10); ++ if (valuelong == NULL) { ++ return -1; ++ } ++ ++ int maxdigits = _PyLong_AsInt(valuelong); ++ Py_DECREF(valuelong); ++ if (maxdigits == -1 && PyErr_Occurred()) { ++ return -1; ++ } ++ ++ *pmaxdigits = maxdigits; ++ return 1; ++} ++ ++ ++static void ++long_init_max_str_digits(void) ++{ ++ // PYTHONINTMAXSTRDIGITS env var ++ char *opt = Py_GETENV("PYTHONINTMAXSTRDIGITS"); ++ int maxdigits; ++ if (opt) { ++ int valid = 0; ++ if (!pymain_str_to_int(opt, &maxdigits)) { ++ valid = ((maxdigits == 0) || (maxdigits >= _PY_LONG_MAX_STR_DIGITS_THRESHOLD)); ++ } ++ if (!valid) { ++#define STRINGIFY(VAL) _STRINGIFY(VAL) ++#define _STRINGIFY(VAL) #VAL ++ fprintf(stderr, "Error in PYTHONINTMAXSTRDIGITS: " ++ "invalid limit; must be >= " ++ STRINGIFY(_PY_LONG_MAX_STR_DIGITS_THRESHOLD) ++ " or 0 for unlimited.\n"); ++ exit(1); ++ } ++ _Py_global_config_int_max_str_digits = maxdigits; ++ } ++ ++ // -X int_max_str_digits command line option ++ int res = long_get_max_str_digits_xoption(&maxdigits); ++ if (res == 1) { ++ int valid = ((maxdigits == 0) || (maxdigits >= _PY_LONG_MAX_STR_DIGITS_THRESHOLD)); ++ if (!valid) { ++ res = -1; ++ } ++ } ++ if (res < 0) { ++ fprintf(stderr, "Error in -X int_max_str_digits: " ++ "invalid limit; must be >= " ++ STRINGIFY(_PY_LONG_MAX_STR_DIGITS_THRESHOLD) ++ " or 0 for unlimited.\n"); ++ exit(1); ++ } ++ if (res == 1) { ++ _Py_global_config_int_max_str_digits = maxdigits; ++ } ++ ++ // Default value ++ if (_Py_global_config_int_max_str_digits == -1) { ++ _Py_global_config_int_max_str_digits = _PY_LONG_DEFAULT_MAX_STR_DIGITS; ++ } ++} ++ ++ + int + _PyLong_Init(void) + { +@@ -5549,6 +5713,8 @@ _PyLong_Init(void) + return 0; + } + ++ long_init_max_str_digits(); ++ + return 1; + } + +diff --git a/Python/ast.c b/Python/ast.c +index 675063e..4b69d86 100644 +--- a/Python/ast.c ++++ b/Python/ast.c +@@ -2149,8 +2149,32 @@ ast_for_atom(struct compiling *c, const node *n) + } + case NUMBER: { + PyObject *pynum = parsenumber(c, STR(ch)); +- if (!pynum) ++ if (!pynum) { ++ PyThreadState *tstate = PyThreadState_GET(); ++ // The only way a ValueError should happen in _this_ code is via ++ // PyLong_FromString hitting a length limit. ++ if (tstate->curexc_type == PyExc_ValueError && ++ tstate->curexc_value != NULL) { ++ PyObject *type, *value, *tb; ++ // This acts as PyErr_Clear() as we're replacing curexc. ++ PyErr_Fetch(&type, &value, &tb); ++ Py_XDECREF(tb); ++ Py_DECREF(type); ++ PyObject *helpful_msg = PyUnicode_FromFormat( ++ "%S - Consider hexadecimal for huge integer literals " ++ "to avoid decimal conversion limits.", ++ value); ++ if (helpful_msg) { ++ const char* error_msg = PyUnicode_AsUTF8(helpful_msg); ++ if (error_msg) { ++ ast_error(c, ch, error_msg); ++ } ++ Py_DECREF(helpful_msg); ++ } ++ Py_DECREF(value); ++ } + return NULL; ++ } + + if (PyArena_AddPyObject(c->c_arena, pynum) < 0) { + Py_DECREF(pynum); +diff --git a/Python/pylifecycle.c b/Python/pylifecycle.c +index 0b985bf..095d1ef 100644 +--- a/Python/pylifecycle.c ++++ b/Python/pylifecycle.c +@@ -97,6 +97,8 @@ int Py_IsolatedFlag = 0; /* for -I, isolate from user's env */ + int Py_LegacyWindowsFSEncodingFlag = 0; /* Uses mbcs instead of utf-8 */ + int Py_LegacyWindowsStdioFlag = 0; /* Uses FileIO instead of WindowsConsoleIO */ + #endif ++/* Unusual name compared to the above for backporting from 3.12 reasons. */ ++int _Py_global_config_int_max_str_digits = -1; /* -X int_max_str_digits or PYTHONINTMAXSTRDIGITS */ + + PyThreadState *_Py_Finalizing = NULL; + +diff --git a/Python/sysmodule.c b/Python/sysmodule.c +index 7d1493c..ecdb62c 100644 +--- a/Python/sysmodule.c ++++ b/Python/sysmodule.c +@@ -1079,6 +1079,46 @@ sys_mdebug(PyObject *self, PyObject *args) + } + #endif /* USE_MALLOPT */ + ++static PyObject * ++sys_get_int_max_str_digits(PyObject *module, PyObject *Py_UNUSED(ignored)) ++{ ++ return PyLong_FromSsize_t(_Py_global_config_int_max_str_digits); ++} ++ ++PyDoc_STRVAR(sys_get_int_max_str_digits__doc__, ++"get_int_max_str_digits($module, /)\n" ++"--\n" ++"\n" ++"Set the maximum string digits limit for non-binary int<->str conversions."); ++ ++static PyObject * ++sys_set_int_max_str_digits(PyObject *module, PyObject *args, PyObject *kwds) ++{ ++ static char *kwlist[] = {"maxdigits", NULL}; ++ int maxdigits; ++ ++ if (!PyArg_ParseTupleAndKeywords(args, kwds, "i:set_int_max_str_digits", ++ kwlist, &maxdigits)) ++ return NULL; ++ ++ if ((!maxdigits) || (maxdigits >= _PY_LONG_MAX_STR_DIGITS_THRESHOLD)) { ++ _Py_global_config_int_max_str_digits = maxdigits; ++ Py_RETURN_NONE; ++ } else { ++ PyErr_Format( ++ PyExc_ValueError, "maxdigits must be 0 or larger than %d", ++ _PY_LONG_MAX_STR_DIGITS_THRESHOLD); ++ return NULL; ++ } ++} ++ ++PyDoc_STRVAR(sys_set_int_max_str_digits__doc__, ++"set_int_max_str_digits($module, /, maxdigits)\n" ++"--\n" ++"\n" ++"Set the maximum string digits limit for non-binary int<->str conversions."); ++ ++ + size_t + _PySys_GetSizeOf(PyObject *o) + { +@@ -1434,6 +1474,8 @@ static PyMethodDef sys_methods[] = { + METH_VARARGS | METH_KEYWORDS, set_asyncgen_hooks_doc}, + {"get_asyncgen_hooks", sys_get_asyncgen_hooks, METH_NOARGS, + get_asyncgen_hooks_doc}, ++ {"get_int_max_str_digits", sys_get_int_max_str_digits, METH_NOARGS, sys_get_int_max_str_digits__doc__}, ++ {"set_int_max_str_digits", (PyCFunction)sys_set_int_max_str_digits, METH_VARARGS|METH_KEYWORDS, sys_set_int_max_str_digits__doc__}, + {NULL, NULL} /* sentinel */ + }; + +@@ -1681,6 +1723,7 @@ static PyStructSequence_Field flags_fields[] = { + {"quiet", "-q"}, + {"hash_randomization", "-R"}, + {"isolated", "-I"}, ++ {"int_max_str_digits", "-X int_max_str_digits"}, + {0} + }; + +@@ -1688,7 +1731,7 @@ static PyStructSequence_Desc flags_desc = { + "sys.flags", /* name */ + flags__doc__, /* doc */ + flags_fields, /* fields */ +- 13 ++ 14 + }; + + static PyObject* +@@ -1719,6 +1762,7 @@ make_flags(void) + SetFlag(Py_QuietFlag); + SetFlag(Py_HashRandomizationFlag); + SetFlag(Py_IsolatedFlag); ++ SetFlag(_Py_global_config_int_max_str_digits); + #undef SetFlag + + if (PyErr_Occurred()) { +-- +2.37.3 + diff --git a/SOURCES/00394-cve-2022-45061-cpu-denial-of-service-via-inefficient-idna-decoder.patch b/SOURCES/00394-cve-2022-45061-cpu-denial-of-service-via-inefficient-idna-decoder.patch new file mode 100644 index 0000000..2eb1aa0 --- /dev/null +++ b/SOURCES/00394-cve-2022-45061-cpu-denial-of-service-via-inefficient-idna-decoder.patch @@ -0,0 +1,95 @@ +From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001 +From: "Miss Islington (bot)" + <31488909+miss-islington@users.noreply.github.com> +Date: Mon, 7 Nov 2022 19:22:14 -0800 +Subject: [PATCH] 00394: CVE-2022-45061: CPU denial of service via inefficient + IDNA decoder + +gh-98433: Fix quadratic time idna decoding. + +There was an unnecessary quadratic loop in idna decoding. This restores +the behavior to linear. + +(cherry picked from commit a6f6c3a3d6f2b580f2d87885c9b8a9350ad7bf15) + +Co-authored-by: Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> +Co-authored-by: Gregory P. Smith +--- + Lib/encodings/idna.py | 32 +++++++++---------- + Lib/test/test_codecs.py | 6 ++++ + ...2-11-04-09-29-36.gh-issue-98433.l76c5G.rst | 6 ++++ + 3 files changed, 27 insertions(+), 17 deletions(-) + create mode 100644 Misc/NEWS.d/next/Security/2022-11-04-09-29-36.gh-issue-98433.l76c5G.rst + +diff --git a/Lib/encodings/idna.py b/Lib/encodings/idna.py +index ea4058512f..bf98f51336 100644 +--- a/Lib/encodings/idna.py ++++ b/Lib/encodings/idna.py +@@ -39,23 +39,21 @@ def nameprep(label): + + # Check bidi + RandAL = [stringprep.in_table_d1(x) for x in label] +- for c in RandAL: +- if c: +- # There is a RandAL char in the string. Must perform further +- # tests: +- # 1) The characters in section 5.8 MUST be prohibited. +- # This is table C.8, which was already checked +- # 2) If a string contains any RandALCat character, the string +- # MUST NOT contain any LCat character. +- if any(stringprep.in_table_d2(x) for x in label): +- raise UnicodeError("Violation of BIDI requirement 2") +- +- # 3) If a string contains any RandALCat character, a +- # RandALCat character MUST be the first character of the +- # string, and a RandALCat character MUST be the last +- # character of the string. +- if not RandAL[0] or not RandAL[-1]: +- raise UnicodeError("Violation of BIDI requirement 3") ++ if any(RandAL): ++ # There is a RandAL char in the string. Must perform further ++ # tests: ++ # 1) The characters in section 5.8 MUST be prohibited. ++ # This is table C.8, which was already checked ++ # 2) If a string contains any RandALCat character, the string ++ # MUST NOT contain any LCat character. ++ if any(stringprep.in_table_d2(x) for x in label): ++ raise UnicodeError("Violation of BIDI requirement 2") ++ # 3) If a string contains any RandALCat character, a ++ # RandALCat character MUST be the first character of the ++ # string, and a RandALCat character MUST be the last ++ # character of the string. ++ if not RandAL[0] or not RandAL[-1]: ++ raise UnicodeError("Violation of BIDI requirement 3") + + return label + +diff --git a/Lib/test/test_codecs.py b/Lib/test/test_codecs.py +index 56485de3f6..a798d1f287 100644 +--- a/Lib/test/test_codecs.py ++++ b/Lib/test/test_codecs.py +@@ -1640,6 +1640,12 @@ class IDNACodecTest(unittest.TestCase): + self.assertEqual("pyth\xf6n.org".encode("idna"), b"xn--pythn-mua.org") + self.assertEqual("pyth\xf6n.org.".encode("idna"), b"xn--pythn-mua.org.") + ++ def test_builtin_decode_length_limit(self): ++ with self.assertRaisesRegex(UnicodeError, "too long"): ++ (b"xn--016c"+b"a"*1100).decode("idna") ++ with self.assertRaisesRegex(UnicodeError, "too long"): ++ (b"xn--016c"+b"a"*70).decode("idna") ++ + def test_stream(self): + r = codecs.getreader("idna")(io.BytesIO(b"abc")) + r.read(3) +diff --git a/Misc/NEWS.d/next/Security/2022-11-04-09-29-36.gh-issue-98433.l76c5G.rst b/Misc/NEWS.d/next/Security/2022-11-04-09-29-36.gh-issue-98433.l76c5G.rst +new file mode 100644 +index 0000000000..5185fac2e2 +--- /dev/null ++++ b/Misc/NEWS.d/next/Security/2022-11-04-09-29-36.gh-issue-98433.l76c5G.rst +@@ -0,0 +1,6 @@ ++The IDNA codec decoder used on DNS hostnames by :mod:`socket` or :mod:`asyncio` ++related name resolution functions no longer involves a quadratic algorithm. ++This prevents a potential CPU denial of service if an out-of-spec excessive ++length hostname involving bidirectional characters were decoded. Some protocols ++such as :mod:`urllib` http ``3xx`` redirects potentially allow for an attacker ++to supply such a name. diff --git a/SPECS/python3.spec b/SPECS/python3.spec index 4937f99..cd2dd36 100644 --- a/SPECS/python3.spec +++ b/SPECS/python3.spec @@ -14,7 +14,7 @@ URL: https://www.python.org/ # WARNING When rebasing to a new Python version, # remember to update the python3-docs package as well Version: %{pybasever}.8 -Release: 48%{?dist} +Release: 48%{?dist}.1 License: Python @@ -695,6 +695,76 @@ Patch378: 00378-support-expat-2-4-5.patch # Tracker bug: https://bugzilla.redhat.com/show_bug.cgi?id=2075390 Patch382: 00382-cve-2015-20107.patch +# 00386 # +# CVE-2021-28861 +# +# Fix an open redirection vulnerability in the `http.server` module when +# an URI path starts with `//` that could produce a 301 Location header +# with a misleading target. Vulnerability discovered, and logic fix +# proposed, by Hamza Avvan (@hamzaavvan). +# +# Test and comments authored by Gregory P. Smith [Google]. +# +# Upstream: https://github.com/python/cpython/pull/93879 +# Tracking bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2120642 +Patch386: 00386-cve-2021-28861.patch + +# 00387 # +# CVE-2020-10735: Prevent DoS by very large int() +# +# gh-95778: CVE-2020-10735: Prevent DoS by very large int() (GH-96504) +# +# Converting between `int` and `str` in bases other than 2 +# (binary), 4, 8 (octal), 16 (hexadecimal), or 32 such as base 10 (decimal) now +# raises a `ValueError` if the number of digits in string form is above a +# limit to avoid potential denial of service attacks due to the algorithmic +# complexity. This is a mitigation for CVE-2020-10735 +# (https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-10735). +# +# This new limit can be configured or disabled by environment variable, command +# line flag, or :mod:`sys` APIs. See the `Integer String Conversion Length +# Limitation` documentation. The default limit is 4300 +# digits in string form. +# +# Patch by Gregory P. Smith [Google] and Christian Heimes [Red Hat] with feedback +# from Victor Stinner, Thomas Wouters, Steve Dower, Ned Deily, and Mark Dickinson. +# +# Notes on the backport to Python 3.6 in RHEL: +# +# * Use "Python 3.6.8-48" version in the documentation, whereas this +# version will never be released +# * Only add _Py_global_config_int_max_str_digits global variable: +# Python 3.6 doesn't have PyConfig API (PEP 597) nor _PyRuntime. +# * sys.flags.int_max_str_digits cannot be -1 on Python 3.6: it is +# set to the default limit. Adapt test_int_max_str_digits() for that. +# * Declare _PY_LONG_DEFAULT_MAX_STR_DIGITS and +# _PY_LONG_MAX_STR_DIGITS_THRESHOLD macros in longobject.h but only +# if the Py_BUILD_CORE macro is defined. +# * Declare _Py_global_config_int_max_str_digits in pydebug.h. +# +# +# gh-95778: Mention sys.set_int_max_str_digits() in error message (#96874) +# +# When ValueError is raised if an integer is larger than the limit, +# mention sys.set_int_max_str_digits() in the error message. +# +# +# gh-96848: Fix -X int_max_str_digits option parsing (#96988) +# +# Fix command line parsing: reject "-X int_max_str_digits" option with +# no value (invalid) when the PYTHONINTMAXSTRDIGITS environment +# variable is set to a valid limit. +Patch387: 00387-cve-2020-10735-prevent-dos-by-very-large-int.patch + +# 00394 # +# CVE-2022-45061: CPU denial of service via inefficient IDNA decoder +# +# gh-98433: Fix quadratic time idna decoding. +# +# There was an unnecessary quadratic loop in idna decoding. This restores +# the behavior to linear. +Patch394: 00394-cve-2022-45061-cpu-denial-of-service-via-inefficient-idna-decoder.patch + # (New patches go here ^^^) # # When adding new patches to "python" and "python3" in Fedora, EL, etc., @@ -1037,6 +1107,9 @@ git apply %{PATCH351} %patch377 -p1 %patch378 -p1 %patch382 -p1 +%patch386 -p1 +%patch387 -p1 +%patch394 -p1 # Remove files that should be generated by the build # (This is after patching, so that we can use patches directly from upstream) @@ -1962,6 +2035,10 @@ fi # ====================================================== %changelog +* Wed Dec 21 2022 Charalampos Stratakis - 3.6.8-48.1 +- Security fixes for CVE-2020-10735, CVE-2021-28861 and CVE-2022-45061 +Resolves: rhbz#1834423, rhbz#2120642, rhbz#2144072 + * Thu Oct 20 2022 Charalampos Stratakis - 3.6.8-48 - Release bump Resolves: rhbz#2136436