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To improve our services to our customers, we have made a number of
additions to the Secunia Advisories and have started translating the
advisories to German.

The improvements will help our customers to get a better
understanding of how we reached our conclusions, how it was rated,
our thoughts on exploitation, attack vectors, and scenarios.

This includes:
* Reason for rating
* Extended description
* Extended solution
* Exploit code or links to exploit code
* Deep links

Read the full description:
http://corporate.secunia.com/products/48/?r=l

Contact Secunia Sales for more information:
http://corporate.secunia.com/how_to_buy/15/?r=l

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TITLE:
Sophos Anti-Virus RAR and CHM Denial of Service Vulnerabilities

SECUNIA ADVISORY ID:
SA22591

VERIFY ADVISORY:
http://secunia.com/advisories/22591/

CRITICAL:
Moderately critical

IMPACT:
DoS

WHERE:
>From remote

SOFTWARE:
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 Small Business Edition
http://secunia.com/product/9822/

DESCRIPTION:
Some 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 RAR archives may in certain
cases cause an infinite loop in the scanning engine and consume all
available CPU resources.

2) An unspecified error when processing CHM files may in certain
cases result in a heap-based buffer overflow.

3) An unspecified error when processing CHM files with long names may
cause a memory corruption.

SOLUTION:
The vulnerabilities will reportedly be fixed in December 2006.

PROVIDED AND/OR DISCOVERED BY:
The vendor credits iDefense.

ORIGINAL ADVISORY:
Sophos:
http://www.sophos.com/support/knowledgebase/article/7609.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.

Subscribe:
http://secunia.com/secunia_security_advisories/

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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