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TITLE:
AVG Anti-Virus UPX Processing Denial of Service

SECUNIA ADVISORY ID:
SA31290

VERIFY ADVISORY:
http://secunia.com/advisories/31290/

CRITICAL:
Moderately critical

IMPACT:
DoS

WHERE:
>From remote

SOFTWARE:
AVG Anti-Virus 8.x
http://secunia.com/product/19381/

DESCRIPTION:
Sergio ‘shadown’ Alvarez has reported a vulnerability in AVG
Anti-Virus, which can be exploited by malicious people to cause a DoS
(Denial of Service).

The vulnerability is caused due to a divide-by-zero error when
processing UPX compressed executables. This can be exploited to cause
the scanning engine to crash when scanning a specially crafted UPX
compressed executable file.

The vulnerability affects versions prior to 8.0.156.

SOLUTION:
Update to version 8.0.156 or later.

PROVIDED AND/OR DISCOVERED BY:
Sergio ‘shadown’ Alvarez

ORIGINAL ADVISORY:
AVG:
http://www.grisoft.com/ww.94247

n.runs AG:
http://www.nruns.com/advisories/%5Bn.runs-SA-2008%20004%5D%20-%20AVG%20Antivirus%20UPX%20parsing%20Divide%20by%20Zero%20Advisory.txt

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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