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Microsoft Hyperlink Object Library stack buffer overflow

Vulnerability Note VU#394444

Original Release Date: 2006-06-21 | Last Revised: 2006-08-22

Overview

The Microsoft Windows system library for handling hyperlinks contains a buffer overflow. Exploitation of this vulnerability may allow an attacker to execute arbitrary code.

Description

Microsoft Hyperlink Object Library (HLINK.DLL)

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.

Impact

By convincing a user to access a specially crafted hyperlink, an attacker could execute arbitrary code with the privileges of the attacked user. If the user is logged in with administrative privileges, the attacker could take complete control of a vulnerable system.

Solution

Apply update from Microsoft
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.

Vendor Information

394444
 
Affected   Unknown   Unaffected

Microsoft Corporation

Notified:  June 21, 2006 Updated:  August 22, 2006

Status

  Vulnerable

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

Refer to http://www.microsoft.com/technet/security/bulletin/ms06-050.mspx

If you have feedback, comments, or additional information about this vulnerability, please send us email.


CVSS Metrics

Group Score Vector
Base N/A N/A
Temporal N/A N/A
Environmental N/A

References

Acknowledgements

This vulnerability was reported by kcope.

This document was written by Jeff Gennari.

Other Information

CVE IDs: CVE-2006-3086
Severity Metric: 37.50
Date Public: 2006-06-18
Date First Published: 2006-06-21
Date Last Updated: 2006-08-22 17:10 UTC
Document Revision: 59

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