A vulnerability has been reported in multiple Symantec products, which can be exploited by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to an error when processing email messages and can be exploited to disable an email client by placing it in an infinite loop where unsuccessful email retrievals are repeatedly attempted.

Successful exploitation requires that the "Internet Email Scanning" feature is installed and enabled (not the default for Symantec AntiVirus and Symantec Client Security).

The vulnerability is reported in the following products and versions:
* Norton AntiVirus 2005 through 2008
* Norton Internet Security 2005 through 2008
* Symantec AntiVirus Corporate Edition 10.2 MR2 and earlier, 10.1 MR7 and earlier, 10.0, 9.0 MR6 and earlier
* Symantec Client Security versions 2.0 MR6 and earlier, 3.0, and 3.1 MR7 and earlier

Solution
Norton AntiVirus 2005 through 2008:
Further details available in Customer Area

Provided and/or discovered by
The vendor credits Mark Litchfield of Next Generation Security Software.

Changelog
Further details available in Customer Area

Original Advisory
Symantec (SYM09-012):
http://www.symantec.com/business/security_response/securityupdates/detail.jsp?fid=security_advisory&pvid=security_advisory&year=2009&suid=20090826_01

Deep Links
Links available in Customer Area