TITLE:
MPlayer AVI "indx" Chunk and ASF Handling Vulnerabilities

SECUNIA ADVISORY ID:
SA19418

VERIFY ADVISORY:
http://secunia.com/advisories/19418/

CRITICAL:
Moderately critical

IMPACT:
DoS, System access

WHERE:
>From remote

SOFTWARE:
MPlayer 1.x
http://secunia.com/product/2255/

DESCRIPTION:
xfocus has reported some vulnerabilities in MPlayer, which can be
exploited by malicious people to cause a DoS (Denial of Service) and
potentially to compromise a user's system.

The vulnerabilities are caused due to integer overflow errors in
"libmpdemux/asfheader.c" within the handling of an ASF file, and in
"libmpdemux/aviheader.c" when parsing the "indx" chunk in an AVI
file. This can be exploited to cause heap-based buffer overflows via
a malicious ASF file, or via a AVI file with specially-crafted
"wLongsPerEntry" and "nEntriesInUse" values in the "indx" chunk.

The vulnerability affects version 1.0pre7try2. Other version may also
be affected.

SOLUTION:
Do not open media files from untrusted sources.

PROVIDED AND/OR DISCOVERED BY:
xfocus

ORIGINAL ADVISORY:
http://lists.grok.org.uk/pipermail/full-disclosure/2006-March/044615.html

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