What’s Vulnerable › Vulnerabilities

CVE-2009-2510

• Severity: medium (CVSS 6.8 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 5.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2009-10-14 · updated 2026-06-16
• Weakness: CWE-310

Description

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.

Affected products

• Microsoft Windows 2000: all versions
• Microsoft Windows 2003 Server: all versions
• Microsoft Windows 7: all versions
• Microsoft Windows Server 2008: all versions
• Microsoft Windows Vista: all versions
• Microsoft Windows XP Service Pack 3: all versions

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
• 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
• 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
• http://www.wired.com/threatlevel/2009/07/kaminsky/

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