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Sophos Anti-Virus Cabinet File Processing Memory Corruption
Secunia Advisory: SA20028
Release Date: 2006-05-09
Popularity: 9,456 views

Critical:
Highly critical
Impact: System access
Where: From remote
Solution Status: Vendor Patch

Software:Sophos Anti-Virus 3.x
Sophos Anti-Virus 4.x
Sophos Anti-Virus 5.x
Sophos Anti-Virus Small Business Edition
Sophos MailMonitor for Notes/Domino
Sophos MailMonitor for SMTP
Sophos PureMessage for UNIX 4.x
Sophos PureMessage for UNIX 5.x
Sophos PureMessage for Windows/Exchange 2.x
Sophos PureMessage Small Business Edition 2.x

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CVE reference:CVE-2006-0994


Description:
A vulnerability has been reported in various Sophos Anti-Virus products, which can be exploited by malicious people to compromise a vulnerable system.

The vulnerability is caused due to an error when unpacking Microsoft Cabinet files (.CAB). This can be exploited to corrupt heap memory when a specially crafted Cabinet file with an invalid folder count in the CAB header is scanned.

Successful exploitation allows execution of arbitrary code, but requires that Cabinet file inspection is enabled.

Solution:
The vendor has issued updated versions (see patch matrix in the vendor's advisory).

Provided and/or discovered by:
Discovered by an anonymous researcher and reported via ZDI.

Original Advisory:
Sophos:
http://www.sophos.com/support/knowledgebase/article/4934.html

Zero Day Initiative:
http://www.zerodayinitiative.com/advisories/ZDI-06-012.html


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