Patchwork [1/1] Python: Fix for CVE-2012-2135

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Submitter yanjun.zhu
Date Nov. 30, 2012, 10:47 a.m.
Message ID <1354272479-5995-1-git-send-email-yanjun.zhu@windriver.com>
Download mbox | patch
Permalink /patch/39955/
State New
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yanjun.zhu - Nov. 30, 2012, 10:47 a.m.
From: "yanjun.zhu" <yanjun.zhu@windriver.com>

Reference:http://bugs.python.org/issue14579

The utf-16 decoder in Python 3.1 through 3.3 does not update the
aligned_end variable after calling the unicode_decode_call_errorhandler
function, which allows remote attackers to obtain sensitive information
(process memory) or cause a denial of service (memory corruption and crash)
via unspecified vectors.

http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2012-2135

[YOCTO #3450]

Signed-off-by: yanjun.zhu <yanjun.zhu@windriver.com>
---
 .../python/python/python-2.7.2-CVE-2012-2135.patch | 25 ++++++++++++++++++++++
 meta/recipes-devtools/python/python_2.7.2.bb       |  1 +
 2 files changed, 26 insertions(+)
 create mode 100644 meta/recipes-devtools/python/python/python-2.7.2-CVE-2012-2135.patch

Patch

diff --git a/meta/recipes-devtools/python/python/python-2.7.2-CVE-2012-2135.patch b/meta/recipes-devtools/python/python/python-2.7.2-CVE-2012-2135.patch
new file mode 100644
index 0000000..e317ebe
--- /dev/null
+++ b/meta/recipes-devtools/python/python/python-2.7.2-CVE-2012-2135.patch
@@ -0,0 +1,25 @@ 
+Reference:http://bugs.python.org/issue14579
+
+This is backport from http://bugs.python.org/file25367/
+utf16_error_handling-2.7.patch
+
+The utf-16 decoder in Python 3.1 through 3.3 does not update the
+aligned_end variable after calling the unicode_decode_call_errorhandler
+function, which allows remote attackers to obtain sensitive information
+(process memory) or cause a denial of service (memory corruption and crash)
+via unspecified vectors.
+
+http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2012-2135
+Signed-off-by: yanjun.zhu <yanjun.zhu@windriver.com>
+diff -urpN a/Objects/unicodeobject.c b/Objects/unicodeobject.c
+--- a/Objects/unicodeobject.c	2012-11-12 16:25:33.000000000 +0800
++++ b/Objects/unicodeobject.c	2012-11-12 16:26:22.000000000 +0800
+@@ -2568,7 +2568,7 @@ PyUnicode_DecodeUTF16Stateful(const char
+         }
+ 
+         /* UTF-16 code pair: */
+-        if (q >= e) {
++        if (e - q < 2) {
+             errmsg = "unexpected end of data";
+             startinpos = (((const char *)q)-2)-starts;
+             endinpos = ((const char *)e)-starts;
diff --git a/meta/recipes-devtools/python/python_2.7.2.bb b/meta/recipes-devtools/python/python_2.7.2.bb
index 2adb4e4..9dabfb7 100644
--- a/meta/recipes-devtools/python/python_2.7.2.bb
+++ b/meta/recipes-devtools/python/python_2.7.2.bb
@@ -24,6 +24,7 @@  SRC_URI += "\
   file://setuptweaks.patch \
   file://check-if-target-is-64b-not-host.patch \
   file://search_db_h_in_inc_dirs_and_avoid_warning.patch \
+  file://python-2.7.2-CVE-2012-2135.patch \
 "
 
 S = "${WORKDIR}/Python-${PV}"