A vulnerability classified as critical has been found in Microsoft Windows (Operating System) (the affected version unknown). This affects an unknown part of the file winhlp32.exe of the component File Viewer. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Multiple unspecified vulnerabilities in Microsoft Windows Help File viewer (winhlp32.exe) allow user-assisted attackers to execute arbitrary code via crafted HLP files.

The weakness was disclosed 08/14/2006 by Benjamin Tobias Franz as not defined posting (Bugtraq). The advisory is shared at securityfocus.com. This vulnerability is uniquely identified as CVE-2006-4138 since 08/14/2006. The exploitability is told to be difficult. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details and a public exploit are known.

The exploit is shared for download at securityfocus.com. It is declared as proof-of-concept. We expect the 0-day to have been worth approximately $100k and more.

Upgrading eliminates this vulnerability.

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• Operating System

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• Microsoft

Name

• Windows

License

• commercial

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