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Insecure Library Loading
Highly critical

AhnLab V3 Antivirus ALZ/UUE/XXE Archive Handling Buffer Overflow

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Release Date:  2005-10-13    Views:  13,809

Secunia Advisory SA16851

Where:

From remote

Impact:

System access

Solution Status:

Vendor Patch

CVE Reference(s):

No CVE references.

Description


Secunia Research has discovered a vulnerability in AhnLab V3 Antivirus, which can be exploited by malicious people to compromise a vulnerable system.

The vulnerability is caused due to a boundary error in the archive decompression library when reading the filename of a compressed file from an ALZ, UUE or XXE archive. This can be exploited to cause a stack-based buffer overflow (ALZ), or a heap-based buffer overflow (UUE/XXE), when a malicious ALZ/UUE/XXE archive is scanned.

Successful exploitation allows arbitrary code execution, but requires that compressed file scanning is enabled.

The vulnerability has been confirmed in the following products:
* AhnLab V3Pro 2004 (AhnLab V3 VirusBlock 2005 international) (Build 6.0.0.457)
* AhnLab V3Net for Windows Server 6.0 (Build 6.0.0.457)
* AhnLab MyV3 with AzMain.dll 1.3.11.15

Prior versions may also be affected.


Solution:
AhnLab V3Pro 2004 (V3 VirusBlock 2005 international):

Further details available to Secunia VIM customers

Provided and/or discovered by:
Tan Chew Keong, Secunia Research

Original Advisory:
AhnLab:
http://global.ahnlab.com/security/security_advisory002.html

Secunia Research:
http://secunia.com/secunia_research/2005-48/advisory/

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: AhnLab V3 Antivirus ALZ/UUE/XXE Archive Handling Buffer Overflow

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