CVE ID:	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.
Test IDs:	None available
Cross References:	Common Vulnerability Exposure (CVE) ID: CVE-2006-6696 BugTraq ID: 21688 http://www.securityfocus.com/bid/21688 BugTraq ID: 23324 http://www.securityfocus.com/bid/23324 Bugtraq: 20061221 Microsoft Windows XP/2003/Vista memory corruption 0day (Google Search) http://www.securityfocus.com/archive/1/455061/100/0/threaded Bugtraq: 20061221 Re: [Full-disclosure] Microsoft Windows XP/2003/Vista memory corruption 0day (Google Search) http://www.securityfocus.com/archive/1/455104/100/0/threaded Bugtraq: 20061221 Re: [Full-disclosure] Microsoft Windows XP/2003/Vista memorycorruption 0day (Google Search) http://www.securityfocus.com/archive/1/455088/100/0/threaded Bugtraq: 20061222 Re: Re: [Full-disclosure] Microsoft Windows XP/2003/Vista memory corruption 0day (Google Search) http://www.securityfocus.com/archive/1/455158/100/0/threaded Bugtraq: 20061230 csrss.exe double-free vulnerability - arbitrary DWORD overwrite exploit (Google Search) http://www.securityfocus.com/archive/1/455546/100/0/threaded http://lists.grok.org.uk/pipermail/full-disclosure/2006-December/051394.html HPdes Security Advisory: HPSBST02208 http://www.securityfocus.com/archive/1/466331/100/200/threaded HPdes Security Advisory: SSRT071365 http://www.securityfocus.com/archive/1/466331/100/200/threaded http://groups.google.ca/group/microsoft.public.win32.programmer.kernel/browse_thread/thread/c5946bf40f227058/7bd7b5d66a4e5aff http://isc.sans.org/diary.php?n&storyid=1965 http://research.eeye.com/html/alerts/zeroday/20061215.html http://www.determina.com/security.research/vulnerabilities/csrss-harderror.html http://www.kuban.ru/forum_new/forum2/files/19124.html http://www.security.nnov.ru/Gnews944.html http://www.security.nnov.ru/files/messagebox.c Microsoft Security Bulletin: MS07-021 https://docs.microsoft.com/en-us/security-updates/securitybulletins/2007/ms07-021 https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1816 http://securitytracker.com/id?1017433 http://secunia.com/advisories/23448 http://www.vupen.com/english/advisories/2006/5120 http://www.vupen.com/english/advisories/2007/1325