Two vulnerabilities have been reported in various Symantec products, which can be exploited by malicious people to cause a DoS (Denial of Service) or compromise a vulnerable system.

1) A boundary error in Symantec's Decomposer engine can be exploited to cause a stack-based buffer overflow when handling a specially crafted .RAR file.

Successful exploitation allows execution of arbitrary code.

2) An error in Symantec's Decomposer engine can be exploited to cause the process to consume large amounts of memory when handling a specially crafted .RAR file.

The vulnerabilities affect all builds of the following products:
* Symantec AntiVirus for Network Attached Storage version 4.3.16.39 and prior
* Symantec AntiVirus Scan Engine version 4.3.16.39 and prior
* Symantec AntiVirus Scan Engine for Caching version 4.3.16.39 and prior
* Symantec AntiVirus Scan Engine for Clearswift version 4.3.16.39 and prior
* Symantec AntiVirus Scan Engine for Messaging version 4.3.16.39 and prior
* Symantec AntiVirus Scan Engine for MS ISA version 4.3.16.39 and prior
* Symantec AntiVirus Scan Engine for MS SharePoint version 4.3.16.39 and prior
* Symantec AntiVirus/Filtering for Domino MPE(AIX, Linux, Solaris) all versions
* Symantec Mail Security for Microsoft Exchange version 4.6.5.12 and prior
* Symantec Mail Security for Microsoft Exchange version 5.0.4.363 and prior
* Symantec Scan Engine version 5.1.4.24 and prior

Solution
Update to the latest versions. Please see the vendor's advisory for details.

Provided and/or discovered by
1) Discovered by an anonymous researcher and reported via iDefense Labs.
2) Discovered by an anonymous researcher and reported via iDefense Labs.

Original Advisory
SYM08-006:
http://www.symantec.com/avcenter/security/Content/2008.02.27.html

iDefense Labs:
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=666
http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=667

Deep Links
Links available to Secunia VIM customers