Bug 959048 (CVE-2013-1983)

Summary:	CVE-2013-1983 libXfixes: Integer overflow leading to heap-based buffer overflow
Product:	[Other] Security Response	Reporter:	Huzaifa S. Sidhpurwala <huzaifas>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	jlieskov, jrusnack, kem, peter.hutterer, security-response-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	libXfixes 5.0.1	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2014-10-16 06:08:28 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	966694, 1078024
Bug Blocks:	959130, 1101912

Description Huzaifa S. Sidhpurwala 2013-05-03 05:08:21 UTC

An integer overflow leading to a heap-based buffer overflow was found in the XFixesGetCursorImage() function of the libXfixes library, an X.Org X11 libXext runtime library. When a X client is connected to a malicious X server, (modified to return invalid values), it can cause arbirary code execution with the privileges of the user running the X client.

Comment 1 Peter Hutterer 2013-05-06 01:40:23 UTC

Created attachment 743931 [details]
0039-Use-_XEatDataWords-to-avoid-overflow-of-_XEatData-ca.patch

Comment 2 Peter Hutterer 2013-05-06 01:41:19 UTC

Created attachment 743932 [details]
0040-integer-overflow-in-XFixesGetCursorImage.patch

Comment 5 Jan Lieskovsky 2013-05-23 15:29:12 UTC

Public via:
  http://www.openwall.com/lists/oss-security/2013/05/23/3

Comment 6 Jan Lieskovsky 2013-05-23 17:04:56 UTC

Upstream patch:

  Prerequisite:
  http://cgit.freedesktop.org/xorg/lib/libXfixes/commit/?id=b031e3b60fa1af9e49449f23d4a84395868be3ab

  Patch for issue:
  http://cgit.freedesktop.org/xorg/lib/libXfixes/commit/?id=c480fe3271873ec7471b0cbd680f4dac18ca8904

Comment 7 Jan Lieskovsky 2013-05-23 17:08:20 UTC

This issue affects the versions of the libXfixes package, as shipped with Fedora release of 17 and 18. Please schedule an update.

Comment 8 Jan Lieskovsky 2013-05-23 17:08:59 UTC

Created libXfixes tracking bugs for this issue

Affects: fedora-all [bug 966694]

Comment 9 Jan Lieskovsky 2013-05-23 17:09:29 UTC

External References:

http://www.x.org/wiki/Development/Security/Advisory-2013-05-23

Comment 10 Fedora Update System 2013-05-27 03:30:21 UTC

libXfixes-5.0-6.20130524gitc480fe327.fc19 has been pushed to the Fedora 19 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 11 Huzaifa S. Sidhpurwala 2013-06-05 03:31:30 UTC

This issue affects the version of libXfixes as shipped with Red Hat Enterprise Linux 5 and 6.

Comment 12 Huzaifa S. Sidhpurwala 2013-06-05 03:45:55 UTC

Statement:

This issue affects the libXfixes package in Red Hat Enterprise Linux 5. Red Hat Product Security has rated this issue as having Moderate security impact. This issue is not planned to be fixed in Red Hat Enterprise Linux 5 as it is now in Production 3 Phase of the support and maintenance life cycle: https://access.redhat.com/support/policy/updates/errata/

Comment 13 Fedora Update System 2013-06-06 01:31:14 UTC

libXfixes-5.0-6.20130524gitc480fe327.fc18 has been pushed to the Fedora 18 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 15 errata-xmlrpc 2014-10-14 05:05:03 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2014:1436 https://rhn.redhat.com/errata/RHSA-2014-1436.html