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Secunia Security Advisory 17186

Secunia Security Advisory 17186
Posted Oct 13, 2005
Authored by Secunia | Site secunia.com

Secunia Security Advisory - fRoGGz has discovered a weakness in AVG Anti-Virus scan engine, which can be exploited by malware to bypass certain scanning functionality.

tags | advisory, virus
MD5 | 23b29af649244ebe94500584942f6eb5

Secunia Security Advisory 17186

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TITLE:
AVG Anti-Virus Engine Malformed ARJ Archive Virus Detection Bypass

SECUNIA ADVISORY ID:
SA17186

VERIFY ADVISORY:
http://secunia.com/advisories/17186/

CRITICAL:
Not critical

IMPACT:
Security Bypass

WHERE:
>From remote

SOFTWARE:
AVG Antivirus Server
http://secunia.com/product/337/

DESCRIPTION:
fRoGGz has discovered a weakness in AVG Anti-Virus scan engine, which
can be exploited by malware to bypass certain scanning functionality.

For more information:
SA17126

The weakness has been confirmed in AVG Email Server Edition version
7.0.344 (267.11.14/131) when scanning an email containing a malformed
".arj" archive with a NULL character prepended to the header. Other
versions may also be affected.

NOTE: This is not an issue on client systems, as the malware is still
detected upon execution by the desktop on-access scanner.

SOLUTION:
Desktop on-access scanner should be used to ensure that the malware
is detected upon extraction.

Filter all compressed file archives at border gateways if they are
not required.

PROVIDED AND/OR DISCOVERED BY:
fRoGGz, SecuBox Labs

OTHER REFERENCES:
SA17126:
http://secunia.com/advisories/17126/

----------------------------------------------------------------------

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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