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TITLE:
ffmpeg Multiple Vulnerabilities

SECUNIA ADVISORY ID:
SA36805

VERIFY ADVISORY:
http://secunia.com/advisories/36805/

DESCRIPTION:
Some vulnerabilities have been discovered in ffmpeg, which can be
exploited by malicious people to cause a DoS (Denial of Service) or
potentially compromise a user's system.

1) Multiple NULL-pointer dereference and division by zero errors when
parsing ".ogv" and ".wmv" files can be exploited to cause a crash.

2) Multiple NULL-pointer dereference and division by zero errors when
parsing AVI files can be exploited to cause a crash.

3) Multiple errors when processing ".ogv" files and "mjpg" encoded
AVI files can be exploited to dereference invalid memory and cause a
crash.

4) An error when processing "iv32" encoded AVI files can be exploited
to corrupt heap memory and potentially execute arbitrary code.

5) An error when processing ".ogv" files can be exploited to trigger
the execution of an infinite loop.

6) An error when processing "h264" encoded AVI files can be exploited
to trigger a floating point exception.

7) An error when parsing MOV atoms can be exploited to trigger a
NULL-pointer dereference.

8) An error when processing ".mp4" files can be exploited to corrupt
heap memory and potentially execute arbitrary code.

9) An error in the AAC codec can be exploited to trigger an
out-of-bounds read and cause a crash.

10) An error in the "mov_read_dref()" function can be exploited to
cause a hang via a specially crafted ".mp4" file.

11) An error in the processing of ".ogv" files can be exploited to
corrupt memory and potentially execute arbitrary code.

The vulnerabilities are confirmed in version 0.5. Other versions may
also be affected.

SOLUTION:
Do not process untrusted files.

Some vulnerabilities are fixed in the SVN repository.

PROVIDED AND/OR DISCOVERED BY:
1-4) Reported by Will Dormann in an ffmpeg bug report.
5-11) Reported via patches committed to the chromium development
repository.

ORIGINAL ADVISORY:
Will Dormann:
https://roundup.ffmpeg.org/roundup/ffmpeg/issue1240

Chromium:
http://src.chromium.org/viewvc/chrome/trunk/deps/third_party/ffmpeg/?view=log

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