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Effectively enabling you to focus your attention on software
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TITLE:
Sophos Anti-Virus UPX and BZIP Processing Denial of Service
Vulnerabilities

SECUNIA ADVISORY ID:
SA26580

VERIFY ADVISORY:
http://secunia.com/advisories/26580/

CRITICAL:
Moderately critical

IMPACT:
DoS

WHERE:
>From remote

SOFTWARE:
Sophos Anti-Virus Small Business Edition 2.x
http://secunia.com/product/14829/
Sophos Anti-Virus Small Business Edition
http://secunia.com/product/9822/
Sophos Anti-Virus for Windows 6.x
http://secunia.com/product/12449/
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/

DESCRIPTION:
Two vulnerabilities have been reported in Sophos Anti-Virus, which
can be exploited by malicious people to cause a DoS (Denial of
Service).

1) An unspecified error when processing UPX-compressed executables
can be exploited to cause the engine to crash.

2) An unspecified error when processing BZIP archives can be
exploited to e.g. cause all the available disk space to be used for
the engine's temporary files.

The vulnerabilities are reported in Sophos Anti-Virus with engine
versions prior to 2.48.0.

SOLUTION:
Update to engine version 2.48.0 or later.

PROVIDED AND/OR DISCOVERED BY:
The vendor credits Sergio 'shadown' Alvarez of n.runs AG.

ORIGINAL ADVISORY:
http://www.sophos.com/support/knowledgebase/article/28407.html

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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.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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