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Symantec Norton AntiSpam ActiveX Component Buffer Overflow Vulnerability

by Donna Buenaventura / March 18, 2004 11:42 PM PST

Secunia Advisory: SA11169
Release Date: 2004-03-19

Critical: Highly critical
Impact: System access

Where: From remote

Software: Norton AntiSpam 2004

NGSSoftware has discovered a vulnerability in Norton AntiSpam 2004, which can be exploited by malicious people to compromise a user's system.

The vulnerability is caused due to a boundary error within the "SymSpamHelper Class" (symspam.dll) ActiveX component. This can be exploited to cause a buffer overflow by passing an overly long parameter to the "LaunchCustomRuleWizard" method.

Successful exploitation may allow execution of arbitrary code on a user's system by tricking the user into viewing a malicious HTML document (e.g. by visiting a website or viewing an HTML-based email).

Solution: A patch is reportedly available via the LiveUpdate feature.

Provided and/or discovered by: Mark Litchfield, NGSSoftware.

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