FFmpeg LibAVCodec Heap Buffer Overflow Vulnerability

BID:15743

Info

FFmpeg LibAVCodec Heap Buffer Overflow Vulnerability

Bugtraq ID: 15743
Class: Boundary Condition Error
CVE: CVE-2005-4048
Remote: Yes
Local: No
Published: Dec 06 2005 12:00AM
Updated: Jan 04 2007 06:27PM
Credit: Simon Kilvington <[email protected]> disclosed this issue to the vendor.
Vulnerable: VLC VLC 0.8.5
VLC VLC 0.8.4
VLC VLC 0.8.1
Ubuntu Ubuntu Linux 5.10 powerpc
Ubuntu Ubuntu Linux 5.10 i386
Ubuntu Ubuntu Linux 5.10 amd64
Ubuntu Ubuntu Linux 5.0 4 powerpc
Ubuntu Ubuntu Linux 5.0 4 i386
Ubuntu Ubuntu Linux 5.0 4 amd64
Ubuntu Ubuntu Linux 4.1 ppc
Ubuntu Ubuntu Linux 4.1 ia64
Ubuntu Ubuntu Linux 4.1 ia32
Slackware Linux 10.2
Slackware Linux -current
Mandriva Linux Mandrake 2006.0 x86_64
Mandriva Linux Mandrake 2006.0
MandrakeSoft Corporate Server 3.0 x86_64
MandrakeSoft Corporate Server 3.0
Gentoo Linux
FFmpeg FFmpeg 0.8.7
FFmpeg FFmpeg 0.4.9 -pre1
FFmpeg FFmpeg 0.4.8
FFmpeg FFmpeg 0.4.7
FFmpeg FFmpeg 0.4.6
FFmpeg FFmpeg CVS
+ Ubuntu Ubuntu Linux 5.0 4 powerpc
 + Ubuntu Ubuntu Linux 5.0 4 i386
 + Ubuntu Ubuntu Linux 5.0 4 amd64
 FFmpeg FFmpeg 2005-03-13
Debian Linux 3.1 sparc
Debian Linux 3.1 s/390
Debian Linux 3.1 ppc
Debian Linux 3.1 mipsel
Debian Linux 3.1 mips
Debian Linux 3.1 m68k
Debian Linux 3.1 ia-64
Debian Linux 3.1 ia-32
Debian Linux 3.1 hppa
Debian Linux 3.1 arm
Debian Linux 3.1 amd64
Debian Linux 3.1 alpha
Debian Linux 3.1
Not Vulnerable: FFmpeg FFmpeg 0.8.7 -r1

Discussion

FFmpeg LibAVCodec Heap Buffer Overflow Vulnerability

FFmpeg's 'libavcodec' is prone to a heap buffer-overflow vulnerability. This issue is due to the library's failure to properly bounds-check user-supplied data before using it in memory allocation and copy operations.

Attackers may exploit this vulnerability to execute arbitrary code in the context of applications that use an affected version of the libavcodec library.

An attacker can exploit this issue by enticing a user to open a malformed PNG file with an application that uses a vulnerable version of libavcodec. If the application is configured as the default handler for PNG files, this could present a viable web or email attack vector -- when the PNG is clicked from an appropriate client application, the application using the vulnerable library will automatically be invoked.

Exploit / POC

FFmpeg LibAVCodec Heap Buffer Overflow Vulnerability

Currently we are not aware of any exploits for this issue. If you feel we are in error or if you are aware of more recent information, please mail us at: [email protected]

Solution / Fix

FFmpeg LibAVCodec Heap Buffer Overflow Vulnerability

Solution:
NOTE: A fix for this issue has been committed to FFmpeg's CVS repository on December 2, 2005. Users of libavcodec built from sources retrieved before this date are encouraged to update their library. The patch from FFmpeg is available from:

http://www1.mplayerhq.hu/cgi-bin/cvsweb.cgi/ffmpeg/libavcodec/utils.c.diff?cvsroot=FFMpeg&r2=1.162&r1=1.161&f=u

Please see the referenced advisories for more information.


FFmpeg FFmpeg CVS

FFmpeg FFmpeg 2005-03-13

FFmpeg FFmpeg 0.4.8

FFmpeg FFmpeg 0.4.9 -pre1

VLC VLC 0.8.1

References

FFmpeg LibAVCodec Heap Buffer Overflow Vulnerability

References:

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