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TITLE:
ClamAV "get_unicode_name()" Off-By-One Vulnerability

SECUNIA ADVISORY ID:
SA32663

VERIFY ADVISORY:
http://secunia.com/advisories/32663/

CRITICAL:
Moderately critical

IMPACT:
DoS, System access

WHERE:
>From remote

SOFTWARE:
Clam AntiVirus (clamav) 0.x
http://secunia.com/advisories/product/2538/

DESCRIPTION:
Moritz Jodeit has reported a vulnerability in ClamAV, which can be
exploited by malicious people to cause a DoS (Denial of Service) or
potentially compromise a vulnerable system.

The vulnerability is caused due to an off-by-one error within the
"get_unicode_name()" function in libclamav/vba_extract.c. This can be
exploited to cause a heap-based buffer overflow with a zero byte via a
specially crafted VBA project.

Successful exploitation may allow execution of arbitrary code.

SOLUTION:
Update to version 0.94.1.

PROVIDED AND/OR DISCOVERED BY:
Moritz Jodeit

ORIGINAL ADVISORY:
ClamAV:
http://sourceforge.net/project/shownotes.php?release_id=637952&group_id=86638

Moritz Jodeit:
http://lists.grok.org.uk/pipermail/full-disclosure/2008-November/065530.html

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