[NT] Norton AntiSpam Remote Buffer Overrun (SymSpamHelper)
From: SecuriTeam (support_at_securiteam.com)
Date: 03/23/04
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To: list@securiteam.com Date: 23 Mar 2004 20:46:12 +0200
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Norton AntiSpam Remote Buffer Overrun (SymSpamHelper)
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SUMMARY
Symantec's <http://www.symantec.com/antispam/> Norton AntiSpam 2004
"filters unwanted email out of your inbox. Working with any POP3 email
program, it filters incoming mail on multiple levels, detecting and
flagging unsolicited messages while promptly delivering valid mail."
An ActiveX control bundled with Norton AntiSpam suffers from a bug that
can easily be exploited to cause a stack based overflow upon viewing a
malicious webpage or Email.
DETAILS
Vulnerable Systems:
* Symantec Norton Antispam 2004
Norton AntiSpam comes bundled with an ActiveX control that is marked safe
for scripting, the SymSpamHelper Class (c:\program
files\commonfiles\symantec shared\antispam\symspam.dll).
Using the method LaunchCustomRuleWizard with an overly long parameter, an
attacker can cause a stack based overflow allowing the ability to remotely
run arbitrary code on the target. This can be achieved either by
encouraging the 'victim' to visit a malicious web page or placing a script
within the content of an HTML Email.
Patch Availability:
A patch can be obtained through Symantec's LiveUpdate.
ADDITIONAL INFORMATION
The information has been provided by <mailto:nisr@nextgenss.com>
NGSSoftware Insight Security Research.
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