- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200601-06 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: xine-lib, FFmpeg: Heap-based buffer overflow Date: January 10, 2006 Bugs: #115849, #116181 ID: 200601-06 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== xine-lib and FFmpeg are vulnerable to a buffer overflow that may be exploited by attackers to execute arbitrary code. Background ========== xine is a GPL high-performance, portable and reusable multimedia playback engine. xine-lib is xine's core engine. FFmpeg is a very fast video and audio converter and is used in xine-lib. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 media-libs/xine-lib < 1.1.1-r3 >= 1.1.1-r3 2 media-video/ffmpeg < 0.4.9_p20051216 >= 0.4.9_p20051216 ------------------------------------------------------------------- 2 affected packages on all of their supported architectures. ------------------------------------------------------------------- Description =========== Simon Kilvington has reported a vulnerability in FFmpeg libavcodec. The flaw is due to a buffer overflow error in the "avcodec_default_get_buffer()" function. This function doesn't properly handle specially crafted PNG files as a result of a heap overflow. Impact ====== A remote attacker could entice a user to run an FFmpeg based application on a maliciously crafted PNG file, resulting in the execution of arbitrary code with the permissions of the user running the application. Workaround ========== There is no known workaround at this time. Resolution ========== All xine-lib users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=media-libs/xine-lib-1.1.1-r3" All FFmpeg users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=media-video/ffmpeg-0.4.9_p20051216" References ========== [ 1 ] CVE-2005-4048 http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-4048 [ 2 ] Original advisory http://article.gmane.org/gmane.comp.video.ffmpeg.devel/26558 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200601-06.xml Concerns? ========= Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@xxxxxxxxxx or alternatively, you may file a bug at http://bugs.gentoo.org. License ======= Copyright 2006 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license. http://creativecommons.org/licenses/by-sa/2.0
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