Vulnerability Note VU#394444

Microsoft Hyperlink Object Library stack buffer overflow

The Hyperlink Object Library provides interfaces for handling hyperlinks. More information is available in the Microsoft Hyperlinks Guide.

The Problem

There is a stack-based buffer overflow in the Microsoft Hyperlink Object Library. The overflow may be triggered by clicking a specially crafted hyperlink. Note that any program that links to the HLINK.DLL library may be vulnerable, including Microsoft Office applications.

Exploit code for this vulnerability is publicly available.

II. Impact

This issue is addressed in Microsoft Security Bulletin MS06-050.

Do not follow unsolicited hyperlinks

Do not click on unsolicited links received in email or embedded in Office documents. Exploitation of this vulnerability requires a user to click a specially crafted link. By only accessing hyperlinks from known and trusted sources, the chances of exploitation are reduced.

Systems Affected

http://blogs.technet.com/msrc/archive/2006/06/20/437826.aspx
http://msdn.microsoft.com/workshop/misc/hlink/reference/ifaces/ihlink/ihlink.asp
http://msdn.microsoft.com/library/default.asp?url=/workshop/misc/hlink/overview/overview.asp
http://www.microsoft.com/technet/security/bulletin/ms06-050.mspx

Credit

This vulnerability was reported by kcope.

This document was written by Jeff Gennari.

Other Information

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