TITLE:
Sophos Anti-Virus Cabinet File Processing Memory Corruption

SECUNIA ADVISORY ID:
SA20028

VERIFY ADVISORY:
http://secunia.com/advisories/20028/

CRITICAL:
Highly critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
Sophos PureMessage for UNIX 5.x
http://secunia.com/product/5622/
Sophos PureMessage for UNIX 4.x
http://secunia.com/product/3876/
Sophos MailMonitor for SMTP
http://secunia.com/product/165/
Sophos MailMonitor for Notes/Domino
http://secunia.com/product/5624/
Sophos Anti-Virus Small Business Edition
http://secunia.com/product/9822/
Sophos Anti-Virus 5.x
http://secunia.com/product/5390/
Sophos Anti-Virus 4.x
http://secunia.com/product/5391/
Sophos Anti-Virus 3.x
http://secunia.com/product/164/
Sophos PureMessage for Windows/Exchange 2.x
http://secunia.com/product/5623/
Sophos PureMessage Small Business Edition 2.x
http://secunia.com/product/9823/

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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About:
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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/


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