GLSA 200601-06: xine-lib, FFmpeg: Heap-based buffer overflow

http://security.gentoo.org/

Severity:	normal
Title:	xine-lib, FFmpeg: Heap-based buffer overflow
Date:	01/10/2006
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	Architecture(s)
media-libs/xine-lib	< 1.1.1-r3	>= 1.1.1-r3	All supported architectures
media-video/ffmpeg	< 0.4.9_p20051216	>= 0.4.9_p20051216	All 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

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@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.