From 2be87227d4b4024c91ff6c856520cac9c9619555 Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Mon, 25 Apr 2022 13:05:40 +0200
Subject: [PATCH 1/2] http: avoid auth/cookie on redirects same host diff port
CVE-2022-27776
Reported-by: Harry Sintonen
Bug: https://curl.se/docs/CVE-2022-27776.html
Closes #8749
Upstream-commit: 6e659993952aa5f90f48864be84a1bbb047fc258
Signed-off-by: Kamil Dudka <kdudka@redhat.com>
---
lib/http.c | 33 +++++++++++++++++++++------------
lib/urldata.h | 16 +++++++++-------
2 files changed, 30 insertions(+), 19 deletions(-)
diff --git a/lib/http.c b/lib/http.c
index 799d4fb..0791dcf 100644
--- a/lib/http.c
+++ b/lib/http.c
@@ -775,6 +775,21 @@ output_auth_headers(struct Curl_easy *data,
return CURLE_OK;
}
+/*
+ * allow_auth_to_host() tells if autentication, cookies or other "sensitive
+ * data" can (still) be sent to this host.
+ */
+static bool allow_auth_to_host(struct Curl_easy *data)
+{
+ struct connectdata *conn = data->conn;
+ return (!data->state.this_is_a_follow ||
+ data->set.allow_auth_to_other_hosts ||
+ (data->state.first_host &&
+ strcasecompare(data->state.first_host, conn->host.name) &&
+ (data->state.first_remote_port == conn->remote_port) &&
+ (data->state.first_remote_protocol == conn->handler->protocol)));
+}
+
/**
* Curl_http_output_auth() setups the authentication headers for the
* host/proxy and the correct authentication
@@ -847,15 +862,11 @@ Curl_http_output_auth(struct Curl_easy *data,
with it */
authproxy->done = TRUE;
- /* To prevent the user+password to get sent to other than the original
- host due to a location-follow, we do some weirdo checks here */
- if(!data->state.this_is_a_follow ||
- conn->bits.netrc ||
- !data->state.first_host ||
- data->set.allow_auth_to_other_hosts ||
- strcasecompare(data->state.first_host, conn->host.name)) {
+ /* To prevent the user+password to get sent to other than the original host
+ due to a location-follow */
+ if(allow_auth_to_host(data)
+ || conn->bits.netrc)
result = output_auth_headers(data, conn, authhost, request, path, FALSE);
- }
else
authhost->done = TRUE;
@@ -1906,10 +1917,7 @@ CURLcode Curl_add_custom_headers(struct Curl_easy *data,
checkprefix("Cookie:", compare)) &&
/* be careful of sending this potentially sensitive header to
other hosts */
- (data->state.this_is_a_follow &&
- data->state.first_host &&
- !data->set.allow_auth_to_other_hosts &&
- !strcasecompare(data->state.first_host, conn->host.name)))
+ !allow_auth_to_host(data))
;
else {
#ifdef USE_HYPER
@@ -2081,6 +2089,7 @@ CURLcode Curl_http_host(struct Curl_easy *data, struct connectdata *conn)
return CURLE_OUT_OF_MEMORY;
data->state.first_remote_port = conn->remote_port;
+ data->state.first_remote_protocol = conn->handler->protocol;
}
Curl_safefree(data->state.aptr.host);
diff --git a/lib/urldata.h b/lib/urldata.h
index 03da59a..f92052a 100644
--- a/lib/urldata.h
+++ b/lib/urldata.h
@@ -1336,14 +1336,16 @@ struct UrlState {
char *ulbuf; /* allocated upload buffer or NULL */
curl_off_t current_speed; /* the ProgressShow() function sets this,
bytes / second */
- char *first_host; /* host name of the first (not followed) request.
- if set, this should be the host name that we will
- sent authorization to, no else. Used to make Location:
- following not keep sending user+password... This is
- strdup() data.
- */
+
+ /* host name, port number and protocol of the first (not followed) request.
+ if set, this should be the host name that we will sent authorization to,
+ no else. Used to make Location: following not keep sending user+password.
+ This is strdup()ed data. */
+ char *first_host;
+ int first_remote_port;
+ unsigned int first_remote_protocol;
+
int retrycount; /* number of retries on a new connection */
- int first_remote_port; /* remote port of the first (not followed) request */
struct Curl_ssl_session *session; /* array of 'max_ssl_sessions' size */
long sessionage; /* number of the most recent session */
struct tempbuf tempwrite[3]; /* BOTH, HEADER, BODY */
--
2.34.1
From c0d12f1634785596746e5d461319dcb95b5b6ae8 Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Mon, 25 Apr 2022 13:05:47 +0200
Subject: [PATCH 2/2] test898: verify the fix for CVE-2022-27776
Do not pass on Authorization headers on redirects to another port
Upstream-commit: afe752e0504ab60bf63787ede0b992cbe1065f78
Signed-off-by: Kamil Dudka <kdudka@redhat.com>
---
tests/data/Makefile.inc | 2 +-
tests/data/test898 | 90 +++++++++++++++++++++++++++++++++++++++++
2 files changed, 91 insertions(+), 1 deletion(-)
create mode 100644 tests/data/test898
diff --git a/tests/data/Makefile.inc b/tests/data/Makefile.inc
index 59d46bc..7ae2cf8 100644
--- a/tests/data/Makefile.inc
+++ b/tests/data/Makefile.inc
@@ -106,7 +106,7 @@ test854 test855 test856 test857 test858 test859 test860 test861 test862 \
test863 test864 test865 test866 test867 test868 test869 test870 test871 \
test872 test873 test874 test875 test876 test877 test878 test879 test880 \
test881 test882 test883 test884 test885 test886 test887 test888 test889 \
-test890 test891 test892 test893 test894 test895 test896 \
+test890 test891 test892 test893 test894 test895 test896 test898 \
\
test900 test901 test902 test903 test904 test905 test906 test907 test908 \
test909 test910 test911 test912 test913 test914 test915 test916 test917 \
diff --git a/tests/data/test898 b/tests/data/test898
new file mode 100644
index 0000000..5cbb7d8
--- /dev/null
+++ b/tests/data/test898
@@ -0,0 +1,90 @@
+<testcase>
+<info>
+<keywords>
+HTTP
+--location
+Authorization
+Cookie
+</keywords>
+</info>
+
+#
+# Server-side
+<reply>
+<data>
+HTTP/1.1 301 redirect
+Date: Tue, 09 Nov 2010 14:49:00 GMT
+Server: test-server/fake
+Content-Length: 0
+Connection: close
+Content-Type: text/html
+Location: http://firsthost.com:9999/a/path/%TESTNUMBER0002
+
+</data>
+<data2>
+HTTP/1.1 200 OK
+Date: Tue, 09 Nov 2010 14:49:00 GMT
+Server: test-server/fake
+Content-Length: 4
+Connection: close
+Content-Type: text/html
+
+hey
+</data2>
+
+<datacheck>
+HTTP/1.1 301 redirect
+Date: Tue, 09 Nov 2010 14:49:00 GMT
+Server: test-server/fake
+Content-Length: 0
+Connection: close
+Content-Type: text/html
+Location: http://firsthost.com:9999/a/path/%TESTNUMBER0002
+
+HTTP/1.1 200 OK
+Date: Tue, 09 Nov 2010 14:49:00 GMT
+Server: test-server/fake
+Content-Length: 4
+Connection: close
+Content-Type: text/html
+
+hey
+</datacheck>
+
+</reply>
+
+#
+# Client-side
+<client>
+<server>
+http
+</server>
+ <name>
+HTTP with custom auth and cookies redirected to HTTP on a diff port
+ </name>
+ <command>
+-x http://%HOSTIP:%HTTPPORT http://firsthost.com -L -H "Authorization: Basic am9lOnNlY3JldA==" -H "Cookie: userpwd=am9lOnNlY3JldA=="
+</command>
+</client>
+
+#
+# Verify data after the test has been "shot"
+<verify>
+<protocol>
+GET http://firsthost.com/ HTTP/1.1
+Host: firsthost.com
+User-Agent: curl/%VERSION
+Accept: */*
+Proxy-Connection: Keep-Alive
+Authorization: Basic am9lOnNlY3JldA==
+Cookie: userpwd=am9lOnNlY3JldA==
+
+GET http://firsthost.com:9999/a/path/%TESTNUMBER0002 HTTP/1.1
+Host: firsthost.com:9999
+User-Agent: curl/%VERSION
+Accept: */*
+Proxy-Connection: Keep-Alive
+
+</protocol>
+</verify>
+</testcase>
--
2.34.1