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TITLE:
VeryDOC PDF Viewer ActiveX Control "OpenPDF()" Buffer Overflow

SECUNIA ADVISORY ID:
SA32725

VERIFY ADVISORY:
http://secunia.com/advisories/32725/

CRITICAL:
Highly critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
VeryDOC PDF Viewer ActiveX Control 2.x
http://secunia.com/advisories/product/20503/

DESCRIPTION:
r0ut3r has discovered a vulnerability in the VeryDOC PDF Viewer
ActiveX control, which potentially can be exploited by malicious
people to compromise a user's system.

The vulnerability is caused due to a boundary error in the
"OpenPDF()" method from the PDFVIEW.PdfviewCtrl.1 ActiveX control
(pdfview.ocx). This can be exploited to cause a heap-based buffer
overflow via an overly large string passed to the affected function.

Successful exploitation may allow execution of arbitrary code.

The vulnerability is confirmed in pdfview.ocx version 2.0.0.1. Other
versions may also be affected.

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

PROVIDED AND/OR DISCOVERED BY:
r0ut3r

ORIGINAL ADVISORY:
http://www.bmgsec.com.au/advisories/openpdf.txt

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