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TITLE:
IncrediMail IMMenuShellExt ActiveX Control Buffer Overflow

SECUNIA ADVISORY ID:
SA25051

VERIFY ADVISORY:
http://secunia.com/advisories/25051/

CRITICAL:
Highly critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
IncrediMail 5.x
http://secunia.com/product/8980/
IncrediMail 3.x
http://secunia.com/product/9150/
IncrediMail 2.x
http://secunia.com/product/7272/

DESCRIPTION:
Will Dormann has reported a vulnerability in the IncrediMail, which
can be exploited by malicious people to compromise a user's system.

The vulnerability is caused due to a boundary error within the
"DoWebMenuAction()" method of the IMMenuShellExt ActiveX control
(ImShExt.dll). This can be exploited to cause a stack-based buffer
overflow when a user e.g. visits a malicious website.

Successful exploitation allows execution of arbitrary code.

SOLUTION:
Set the kill-bit for the affected ActiveX control.

PROVIDED AND/OR DISCOVERED BY:
Will Dormann, CERT/CC.

ORIGINAL ADVISORY:
US-CERT VU#906777:
http://www.kb.cert.org/vuls/id/906777

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