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TITLE:
PowerPoint Viewer OCX ActiveX Control Buffer Overflow

SECUNIA ADVISORY ID:
SA25092

VERIFY ADVISORY:
http://secunia.com/advisories/25092/

CRITICAL:
Highly critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
PowerPoint Viewer OCX 3.x
http://secunia.com/product/14109/

DESCRIPTION:
shinnai has discovered a vulnerability in PowerPoint Viewer OCX,
which can be exploited by malicious people to compromise a user's
system.

The vulnerability is caused due to a boundary error within the
PowerPoint Viewer ActiveX control (PowerPointViewer.ocx). This can be
exploited to cause a stack-based buffer overflow via an overly long
argument passed to certain methods (e.g. "HttpDownloadFile()" or
"OpenWebFile()").

Successful exploitation may allow execution of arbitrary code when a
user visits a malicious website.

The vulnerability is confirmed in version 3.1.0.3. Other versions may
also be affected.

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

PROVIDED AND/OR DISCOVERED BY:
shinnai

ORIGINAL ADVISORY:
http://moaxb.blogspot.com/2007/05/moaxb-01-powerpointviewerocx-31.html

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