[curl/f18] fix cookie tailmatching to prevent cross-domain leakage (CVE-2013-1944)
Kamil Dudka
kdudka at fedoraproject.org
Fri Apr 12 14:56:22 UTC 2013
commit 2d40145f4dba010a1569ddf0f75b72e936fbe956
Author: Kamil Dudka <kdudka at redhat.com>
Date: Fri Apr 12 16:26:12 2013 +0200
fix cookie tailmatching to prevent cross-domain leakage (CVE-2013-1944)
0011-curl-7.27.0-2eb8dcf2.patch | 267 +++++++++++++++++++++++++++++++++++++++
curl.spec | 9 ++-
2 files changed, 275 insertions(+), 1 deletions(-)
---
diff --git a/0011-curl-7.27.0-2eb8dcf2.patch b/0011-curl-7.27.0-2eb8dcf2.patch
new file mode 100644
index 0000000..421c5fe
--- /dev/null
+++ b/0011-curl-7.27.0-2eb8dcf2.patch
@@ -0,0 +1,267 @@
+From 5ceda5fa61a87015275ab94f99da4f92f49ac802 Mon Sep 17 00:00:00 2001
+From: Kamil Dudka <kdudka at redhat.com>
+Date: Fri, 12 Apr 2013 16:49:32 +0200
+Subject: [PATCH 1/3] test1216: test tailmatching cookie domains
+
+This test is an attempt to repeat the problem YAMADA Yasuharu reported
+at http://curl.haxx.se/mail/lib-2013-04/0108.html
+
+Conflicts:
+
+ tests/data/Makefile.am
+
+Signed-off-by: Kamil Dudka <kdudka at redhat.com>
+---
+ tests/data/Makefile.am | 2 +-
+ tests/data/test1216 | 62 ++++++++++++++++++++++++++++++++++++++++++++++++
+ 2 files changed, 63 insertions(+), 1 deletions(-)
+ create mode 100644 tests/data/test1216
+
+diff --git a/tests/data/Makefile.am b/tests/data/Makefile.am
+index 372f127..9321d61 100644
+--- a/tests/data/Makefile.am
++++ b/tests/data/Makefile.am
+@@ -78,7 +78,7 @@ test1118 test1119 test1120 test1121 test1122 test1123 test1124 test1125 \
+ test1126 test1127 test1128 test1129 test1130 test1131 \
+ test1200 test1201 test1202 test1203 test1204 test1205 test1206 test1207 \
+ test1208 test1209 test1210 test1211 \
+-test1220 \
++test1220 test1216 \
+ test1300 test1301 test1302 test1303 test1304 test1305 \
+ test1306 test1307 test1308 test1309 test1310 test1311 test1312 test1313 \
+ test1314 test1315 test1316 test1317 test1318 test1319 test1320 test1321 \
+diff --git a/tests/data/test1216 b/tests/data/test1216
+new file mode 100644
+index 0000000..e63fe92
+--- /dev/null
++++ b/tests/data/test1216
+@@ -0,0 +1,62 @@
++<testcase>
++<info>
++<keywords>
++HTTP
++HTTP GET
++HTTP proxy
++cookies
++</keywords>
++</info>
++
++# Server-side
++<reply>
++<data>
++HTTP/1.1 200 OK
++Server: Microsoft-IIS/4.0
++Date: Tue, 25 Sep 2001 19:37:44 GMT
++Content-Type: text/html
++Connection: close
++Content-Length: 21
++
++This server says moo
++</data>
++</reply>
++
++# Client-side
++<client>
++<server>
++http
++</server>
++ <name>
++HTTP cookie domains tailmatching the host name
++ </name>
++ <command>
++http://example.fake/c/1216 http://bexample.fake/c/1216 -b log/injar1216 -x %HOSTIP:%HTTPPORT
++</command>
++<file name="log/injar1216">
++example.fake FALSE /a FALSE 2139150993 mooo indeed
++example.fake FALSE /b FALSE 0 moo1 indeed
++example.fake FALSE /c FALSE 2139150993 moo2 indeed
++</file>
++</client>
++
++# Verify data after the test has been "shot"
++<verify>
++<strip>
++^User-Agent:.*
++</strip>
++<protocol>
++GET http://example.fake/c/1216 HTTP/1.1
++Host: example.fake
++Accept: */*
++Proxy-Connection: Keep-Alive
++Cookie: moo2=indeed
++
++GET http://bexample.fake/c/1216 HTTP/1.1
++Host: bexample.fake
++Accept: */*
++Proxy-Connection: Keep-Alive
++
++</protocol>
++</verify>
++</testcase>
+--
+1.7.1
+
+
+From 3cf21844356a152df3af92530bb607ef880588af Mon Sep 17 00:00:00 2001
+From: YAMADA Yasuharu <yasuharu.yamada at access-company.com>
+Date: Thu, 11 Apr 2013 00:17:15 +0200
+Subject: [PATCH 2/3] cookie: fix tailmatching to prevent cross-domain leakage
+
+Cookies set for 'example.com' could accidentaly also be sent by libcurl
+to the 'bexample.com' (ie with a prefix to the first domain name).
+
+This is a security vulnerabilty, CVE-2013-1944.
+
+Bug: http://curl.haxx.se/docs/adv_20130412.html
+
+Signed-off-by: Kamil Dudka <kdudka at redhat.com>
+---
+ lib/cookie.c | 24 +++++++++++++++++++-----
+ 1 files changed, 19 insertions(+), 5 deletions(-)
+
+diff --git a/lib/cookie.c b/lib/cookie.c
+index 644b33a..760a931 100644
+--- a/lib/cookie.c
++++ b/lib/cookie.c
+@@ -118,15 +118,29 @@ static void freecookie(struct Cookie *co)
+ free(co);
+ }
+
+-static bool tailmatch(const char *little, const char *bigone)
++static bool tailmatch(const char *cooke_domain, const char *hostname)
+ {
+- size_t littlelen = strlen(little);
+- size_t biglen = strlen(bigone);
++ size_t cookie_domain_len = strlen(cooke_domain);
++ size_t hostname_len = strlen(hostname);
+
+- if(littlelen > biglen)
++ if(hostname_len < cookie_domain_len)
+ return FALSE;
+
+- return Curl_raw_equal(little, bigone+biglen-littlelen) ? TRUE : FALSE;
++ if(!Curl_raw_equal(cooke_domain, hostname+hostname_len-cookie_domain_len))
++ return FALSE;
++
++ /* A lead char of cookie_domain is not '.'.
++ RFC6265 4.1.2.3. The Domain Attribute says:
++ For example, if the value of the Domain attribute is
++ "example.com", the user agent will include the cookie in the Cookie
++ header when making HTTP requests to example.com, www.example.com, and
++ www.corp.example.com.
++ */
++ if(hostname_len == cookie_domain_len)
++ return TRUE;
++ if('.' == *(hostname + hostname_len - cookie_domain_len - 1))
++ return TRUE;
++ return FALSE;
+ }
+
+ /*
+--
+1.7.1
+
+
+From cb95277d4732d7e9a50df7cca2ce0aa8dc0aa5b9 Mon Sep 17 00:00:00 2001
+From: Kamil Dudka <kdudka at redhat.com>
+Date: Fri, 12 Apr 2013 16:50:11 +0200
+Subject: [PATCH 3/3] test1218: another cookie tailmatch test
+
+These tests verify commit 3604fde3d3c9b0d, the fix for the "cookie
+domain tailmatch" vulnerability. See
+http://curl.haxx.se/docs/adv_20130412.html
+
+Conflicts:
+
+ tests/data/Makefile.am
+
+Signed-off-by: Kamil Dudka <kdudka at redhat.com>
+---
+ tests/data/Makefile.am | 2 +-
+ tests/data/test1218 | 61 ++++++++++++++++++++++++++++++++++++++++++++++++
+ 2 files changed, 62 insertions(+), 1 deletions(-)
+ create mode 100644 tests/data/test1218
+
+diff --git a/tests/data/Makefile.am b/tests/data/Makefile.am
+index 9321d61..c8295c3 100644
+--- a/tests/data/Makefile.am
++++ b/tests/data/Makefile.am
+@@ -78,7 +78,7 @@ test1118 test1119 test1120 test1121 test1122 test1123 test1124 test1125 \
+ test1126 test1127 test1128 test1129 test1130 test1131 \
+ test1200 test1201 test1202 test1203 test1204 test1205 test1206 test1207 \
+ test1208 test1209 test1210 test1211 \
+-test1220 test1216 \
++test1220 test1216 1218 \
+ test1300 test1301 test1302 test1303 test1304 test1305 \
+ test1306 test1307 test1308 test1309 test1310 test1311 test1312 test1313 \
+ test1314 test1315 test1316 test1317 test1318 test1319 test1320 test1321 \
+diff --git a/tests/data/test1218 b/tests/data/test1218
+new file mode 100644
+index 0000000..7d86547
+--- /dev/null
++++ b/tests/data/test1218
+@@ -0,0 +1,61 @@
++<testcase>
++<info>
++<keywords>
++HTTP
++HTTP GET
++HTTP proxy
++cookies
++</keywords>
++</info>
++
++# This test is very similar to 1216, only that it sets the cookies from the
++# first site instead of reading from a file
++<reply>
++<data>
++HTTP/1.1 200 OK
++Date: Tue, 25 Sep 2001 19:37:44 GMT
++Set-Cookie: domain=.example.fake; bug=fixed;
++Content-Length: 21
++
++This server says moo
++</data>
++</reply>
++
++# Client-side
++<client>
++<server>
++http
++</server>
++ <name>
++HTTP cookies and domains with same prefix
++ </name>
++ <command>
++http://example.fake/c/1218 http://example.fake/c/1218 http://bexample.fake/c/1218 -b nonexisting -x %HOSTIP:%HTTPPORT
++</command>
++</client>
++
++# Verify data after the test has been "shot"
++<verify>
++<strip>
++^User-Agent:.*
++</strip>
++<protocol>
++GET http://example.fake/c/1218 HTTP/1.1
++Host: example.fake
++Accept: */*
++Proxy-Connection: Keep-Alive
++
++GET http://example.fake/c/1218 HTTP/1.1
++Host: example.fake
++Accept: */*
++Proxy-Connection: Keep-Alive
++Cookie: bug=fixed
++
++GET http://bexample.fake/c/1218 HTTP/1.1
++Host: bexample.fake
++Accept: */*
++Proxy-Connection: Keep-Alive
++
++</protocol>
++</verify>
++</testcase>
+--
+1.7.1
+
diff --git a/curl.spec b/curl.spec
index 9f9ed3c..d4b22cd 100644
--- a/curl.spec
+++ b/curl.spec
@@ -1,7 +1,7 @@
Summary: A utility for getting files from remote servers (FTP, HTTP, and others)
Name: curl
Version: 7.27.0
-Release: 7%{?dist}
+Release: 8%{?dist}
License: MIT
Group: Applications/Internet
Source: http://curl.haxx.se/download/%{name}-%{version}.tar.lzma
@@ -38,6 +38,9 @@ Patch9: 0009-curl-7.27.0-f206d6c0.patch
# curl_global_init() now accepts the CURL_GLOBAL_ACK_EINTR flag
Patch10: 0010-curl-7.27.0-57ccdfa8.patch
+# fix cookie tailmatching to prevent cross-domain leakage (CVE-2013-1944)
+Patch11: 0011-curl-7.27.0-2eb8dcf2.patch
+
# patch making libcurl multilib ready
Patch101: 0101-curl-7.27.0-multilib.patch
@@ -141,6 +144,7 @@ documentation of the library, too.
%patch8 -p1
%patch9 -p1
%patch10 -p1
+%patch11 -p1
# Fedora patches
%patch101 -p1
@@ -264,6 +268,9 @@ rm -rf $RPM_BUILD_ROOT
%{_datadir}/aclocal/libcurl.m4
%changelog
+* Fri Apr 12 2013 Kamil Dudka <kdudka at redhat.com> 7.27.0-8
+- fix cookie tailmatching to prevent cross-domain leakage (CVE-2013-1944)
+
* Tue Mar 12 2013 Kamil Dudka <kdudka at redhat.com> 7.27.0-7
- curl_global_init() now accepts the CURL_GLOBAL_ACK_EINTR flag (#919127)
More information about the scm-commits
mailing list