Sophos Anti-Virus UPX and BZIP Processing Vulnerabilities - Secunia Advisories - Vulnerability Intelligence

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Sophos Anti-Virus UPX and BZIP Processing Vulnerabilities
Secunia Advisory:	SA26580	Advisory Toolbox: Issue ticket Save in to-do list Mark as handled Exploit information Download as PDF Review actions Add comment
Release Date:	2007-08-24
Last Update:	2007-09-04
Popularity:	7,490 views

Critical:	Highly critical
Impact:	DoS 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 for Windows 6.x Sophos Anti-Virus Small Business Edition Sophos Anti-Virus Small Business Edition 2.x

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CVE reference:	CVE-2007-4577 CVE-2007-4578

Description: Two vulnerabilities have been reported in Sophos Anti-Virus, which can be exploited by malicious people to cause a DoS (Denial of Service) or potentially compromise a vulnerable system. 1) An input validation error when processing UPX-compressed executables can be exploited to write one byte to an arbitrary location. Successful exploitation may allow execution of arbitrary code. 2) An error when processing BZIP archives can be exploited to cause an infinite loop and 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: Sergio Alvarez, n.runs AG Changelog: 2007-09-03: Added CVE reference. 2007-09-04: Increased criticality and added "System access" impact based on updated information from n.runs AG and Sophos. Added links to n.runs AG. Original Advisory: Sophos: http://www.sophos.com/support/knowledgebase/article/28407.html n.runs AG: http://www.nruns.com/security_advisory_sophos_upx_code_execution.php http://www.nruns.com/security_advisory_sophos_gzip_infinite_loop_dos.php

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