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VeryDOC PDF Viewer ActiveX Control "OpenPDF()" Buffer Overflow
Secunia Advisory: SA32725
Release Date: 2008-11-17
Last Update: 2008-12-17
Popularity: 879 views

Critical:
Highly critical
Impact: System access
Where: From remote
Solution Status: Unpatched

Software:VeryDOC PDF Viewer ActiveX Control 2.x

Binary Analysis: BA607 :: Available for 1 Credit

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CVE reference:CVE-2008-5492


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

Changelog:
2008-12-17: Added CVE reference.

Original Advisory:
http://www.bmgsec.com.au/advisories/openpdf.txt

Extended Solution:
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