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Arrow  Topic :

Sophos Antivirus UPX parsing Arbitrary CodeExecution Advisory


Arrow  SecurityAlert : 3072
Arrow  CVE : CVE-2007-4578
Arrow  SecurityRisk : High  Security Risk High  (About)
Arrow  Remote Exploit : No
Arrow  Local Exploit : Yes
Arrow  Exploit Available : No
Arrow  Credit : Sergio Alvarez
Arrow  Published : 29.08.2007

Arrow  Affected Software : Sophos Antivirus UPX



Arrow  Advisory Content :  

n.runs AG
http://www.nruns.com/ security(at)nruns.com
n.runs-SA-2007.027 24-Aug-2007
________________________________________________________________________

Vendor: Sophos, http://www.sophos.com
Affected Products:
Sophos Anti-Virus for Windows
Sophos Anti-Virus for Unix/Linux
Vulnerability: Arbitrary Code Execution (remote)
Risk: HIGH
________________________________________________________________________

Vendor communication:

2007/05/07 initial notification to Sophos
2007/05/09 Sophos Response
2007/05/14 PGP public keys exchange
2007/05/14 PoC files sent to Sophos
2007/05/17 Sophos acknowledged the PoC files
2007/05/17 Sophos Corporation validate the Vulnerability
2007/05/17 Sophos notify tentative update release date
2007/07/31 Sophos notify a delay in the update release date
2007/08/23 Sophos Update with fixes released
________________________________________________________________________

Overview:

Sophos is a world leader in IT security and control solutions
purpose-built
for business, education, government organizations and service providers.
Their reliably engineered, easy-to-operate products protect over 100
million
users in more than 150 countries from viruses, spyware, adware, Trojans,
intrusion, spam, policy abuse, and uncontrolled network access.

Description:

A remotely exploitable vulnerability has been found in the file parsing
engine.

In detail, the following flaw was determined:

- Infinite Loop in UPX packed files parsing

Impact:

This problem can lead to remote denial of service or arbitrary code
execution if an attacker carefully crafts a file that exploits the
aforementioned vulnerability. The vulnerability is present in Sophos
Anti-virus software listed above on all platforms supported by the
affected
products prior to the engine Version 2.48.0.

Solution:
The vulnerability was reported on 07.May.2007 and an update has been
issued
on 23.Aug.2007 to solve this vulnerability. For detailed information about
the fixes follow the link in the References [1] section of this document.
n.runs AG wants to highlight the excellent and fluent communication with
Sophos.
________________________________________________________________________

Credit:
Bugs found by Sergio Alvarez of n.runs AG.
_____________________ ___________________________________________________

References:
http://www.sophos.com/support/knowledgebase/article/28407.html [1]

This Advisory and Upcoming Advisories:
http://www.nruns.com/security_advisory.php
________________________________________________________________________

Unaltered electronic reproduction of this advisory is permitted. For all
other reproduction or publication, in printing or otherwise, contact
security (at) nruns (dot) com [email concealed] for permission. Use of the
advisory constitutes
acceptance for use in an "as is" condition. All warranties are excluded.
In
no event shall n.runs be liable for any damages whatsoever including
direct,
indirect, incidental, consequential, loss of business profits or special
damages, even if n.runs has been advised of the possibility of such
damages.

Copyright 2007 n.runs AG. All rights reserved. Terms of use apply.






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