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2003: 2,700 advisories published
2004: 3,100 advisories published
2005: 4,600 advisories published
2006: 5,300 advisories published

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TITLE:
AhnLab Products V3 Engine ZIP Archive Processing NULL Byte Overwrite

SECUNIA ADVISORY ID:
SA27757

VERIFY ADVISORY:
http://secunia.com/advisories/27757/

CRITICAL:
Moderately critical

IMPACT:
DoS, System access

WHERE:
>From remote

SOFTWARE:
AhnLab V3Pro 2004 (AhnLab V3 VirusBlock 2005)
http://secunia.com/product/5699/
AhnLab V3 Internet Security 2007
http://secunia.com/product/16649/

DESCRIPTION:
A vulnerability has been reported in AhnLab products, 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 input validation error in the
AhnLab V3 Engine when handling the filename length field in a ZIP
archive. This can be exploited to overwrite an arbitrary, although
limited, memory location with a NULL byte via a specially crafted ZIP
archive.

The vulnerability affects the following products:
* AhnLab V3 Pro 2004
* AhnLab V3 Internet Security 2007

SOLUTION:
Update to versions later than V3 Engine 2007.11.08.00. The vendor
recommends updating to the latest V3 Engine via Smart Update.

PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor and independently discovered by Sowhat, Nevis
Labs.

ORIGINAL ADVISORY:
AhnLab:
http://global.ahnlab.com/global/notice_view.ESD?fmethod=view&press_seq=803&printNum=2

Nevis Labs:
http://secway.org/advisory/AD20071116.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.

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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.
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use those supplied by the vendor.

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