CVE-2009-2510
The CryptoAPI component in Microsoft Windows 2000 SP4, Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista Gold, SP1, and SP2, Windows Server 2008 Gold, SP2, and R2, and Windows 7, as used by Internet Explorer and other applications, does not properly handle a '\0' character in a domain name in the subject's Common Name (CN) field of an X.509 certificate, which allows man-in-the-middle attackers to spoof arbitrary SSL servers via a crafted certificate issued by a legitimate Certification Authority, aka "Null Truncation in X.509 Common Name Vulnerability," a related issue to CVE-2009-2408.
Key facts
- CVSS score
- 6.8 (v2.0)
- Severity
- MEDIUM
- CVSS vector
AV:N/AC:M/Au:N/C:P/I:P/A:P- Weakness (CWE)
- CWE-310
- EPSS score
- 5.3% (93th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2009-2505)
- Published
- October 14, 2009
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2009-2505 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 2003 server
- microsoft / windows 2003 server
- microsoft / windows 2003 server
- microsoft / windows 7
- microsoft / windows server 2008
- microsoft / windows server 2008
- microsoft / windows server 2008
- microsoft / windows server 2008
- microsoft / windows server 2008
- microsoft / windows server 2008
- microsoft / windows server 2008
- microsoft / windows server 2008
- microsoft / windows vista
- microsoft / windows vista
- microsoft / windows vista
- microsoft / windows vista
- microsoft / windows xp
- microsoft / windows xp
- microsoft / windows xp
Certified products that may be affected
18 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.
- Windows 7 BitLocker™ Drive Encryption - Microsoft Corporation - FIPS 140 1332 - historical
- Microsoft Windows 7 Kernel Mode Cryptographic Primitives Library (cng.sys) - Microsoft Corporation - FIPS 140 1328 - historical
- Microsoft Windows Vista Kernel Mode Security Support Provider Interface (ksecdd.sys) - Microsoft Corporation - FIPS 140 1000 - historical
- Microsoft Windows Vista Cryptographic Primitives Library (bcrypt.dll) - Microsoft Corporation - FIPS 140 1001 - historical
- Windows Vista Enhanced Cryptographic Provider (RSAENH) - Microsoft Corporation - FIPS 140 1002 - historical
See all 18 in the Security Certifications Explorer.
References
- http://www.networkworld.com/news/2009/073009-more-holes-found-in-webs.html
- http://www.networkworld.com/news/2009/091709-microsoft-ie-security-hole.html
- http://www.securityfocus.com/bid/36475
- http://www.us-cert.gov/cas/techalerts/TA09-286A.html(US Government Resource)
- http://www.wired.com/threatlevel/2009/07/kaminsky/
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-056
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5842
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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