CVE-2006-6696
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.
Key facts
- CVSS score
- 6.9 (v2.0)
- Severity
- MEDIUM
- CVSS vector
AV:L/AC:M/Au:N/C:C/I:C/A:C- Weakness (CWE)
- CWE-119
- EPSS score
- 3.4% (89th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2006-6679)
- Published
- December 22, 2006
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2006-6679 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- microsoft / windows 2000
- microsoft / windows 2000
- microsoft / windows 2000
- microsoft / windows 2000
- microsoft / windows 2000
- microsoft / windows 2003 server
- microsoft / windows 2003 server
- microsoft / windows 2003 server
- microsoft / windows 2003 server
- microsoft / windows 2003 server
- microsoft / windows 2003 server
- microsoft / windows 2003 server
- microsoft / windows 2003 server
- microsoft / windows 2003 server
- microsoft / windows 2003 server
- microsoft / windows 2003 server
- microsoft / windows 2003 server
- microsoft / windows vista
- microsoft / windows vista
- microsoft / windows vista
- microsoft / windows vista
- microsoft / windows xp
- microsoft / windows xp
- microsoft / windows xp
- microsoft / windows xp
- microsoft / windows xp
- microsoft / windows xp
- microsoft / windows xp
- microsoft / windows xp
Certified products that may be affected
7 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.
- Windows Vista Enhanced Cryptographic Provider (RSAENH) - Microsoft Corporation - FIPS 140 1002 - historical
- Windows Vista Enhanced DSS and Diffie-Hellman Cryptographic Provider (DSSENH) - Microsoft Corporation - FIPS 140 1003 - historical
- Windows Vista Boot Manager (bootmgr) - Microsoft Corporation - FIPS 140 978 - historical
- Windows Vista Winload OS Loader (winload.exe) - Microsoft Corporation - FIPS 140 979 - historical
- Windows Vista Code Integrity (ci.dll) - Microsoft Corporation - FIPS 140 980 - historical
See all 7 in the Security Certifications Explorer.
References
- http://blogs.technet.com/msrc/archive/2006/12/22/new-report-of-a-windows-vulnerability.aspx
- 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://lists.grok.org.uk/pipermail/full-disclosure/2006-December/051394.html
- http://research.eeye.com/html/alerts/zeroday/20061215.html
- http://secunia.com/advisories/23448(Vendor Advisory)
- http://securitytracker.com/id?1017433
- 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
- http://www.securityfocus.com/archive/1/455061/100/0/threaded
- http://www.securityfocus.com/archive/1/455088/100/0/threaded
- http://www.securityfocus.com/archive/1/455104/100/0/threaded
- http://www.securityfocus.com/archive/1/455158/100/0/threaded
- http://www.securityfocus.com/archive/1/455546/100/0/threaded
- http://www.securityfocus.com/archive/1/466331/100/200/threaded
- http://www.securityfocus.com/bid/21688
- http://www.securityfocus.com/bid/23324
- http://www.vupen.com/english/advisories/2006/5120
- http://www.vupen.com/english/advisories/2007/1325
- 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
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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