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CVE-2006-6696

Description

Double free vulnerability in Microsoft Windows 2000, XP, 2003, and Vista allows local users to gain privileges by calling the MessageBox function with a MB_SERVICE_NOTIFICATION message with crafted data, which sends a HardError message to Client/Server Runtime Server Subsystem (CSRSS) process, which is not properly handled when invoking the UserHardError and GetHardErrorText functions in WINSRV.DLL.

POC

Reference

- http://isc.sans.org/diary.php?n&storyid=1965

- http://www.security.nnov.ru/Gnews944.html

- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2007/ms07-021

Github

No PoCs found on GitHub currently.