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From b40eb0f43daecc6e2e3ce47b0be49cf570d02adc Mon Sep 17 00:00:00 2001
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From: Lumir Balhar <lbalhar@redhat.com>
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Date: Thu, 9 Jan 2020 11:14:58 +0100
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Subject: [PATCH] CVE-2019-9740
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---
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util/url.py | 7 +++++++
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1 file changed, 7 insertions(+)
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diff --git a/util/url.py b/util/url.py
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index 6b6f996..2784c85 100644
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--- a/util/url.py
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+++ b/util/url.py
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@@ -1,5 +1,6 @@
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from __future__ import absolute_import
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from collections import namedtuple
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+import re
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from ..exceptions import LocationParseError
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@@ -10,6 +11,8 @@ url_attrs = ['scheme', 'auth', 'host', 'port', 'path', 'query', 'fragment']
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# urllib3 infers URLs without a scheme (None) to be http.
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NORMALIZABLE_SCHEMES = ('http', 'https', None)
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+_contains_disallowed_url_pchar_re = re.compile('[\x00-\x20\x7f]')
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+from ..packages.six.moves.urllib.parse import quote
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class Url(namedtuple('Url', url_attrs)):
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"""
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@@ -155,6 +158,10 @@ def parse_url(url):
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# Empty
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return Url()
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+ # Prevent CVE-2019-9740.
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+ # adapted from https://github.com/python/cpython/pull/12755
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+ url = _contains_disallowed_url_pchar_re.sub(lambda match: quote(match.group()), url)
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+
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scheme = None
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auth = None
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host = None
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--
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2.24.1
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