CVE-2011-0040

Severity: medium (CVSS 5.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 22.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2011-02-09 · updated 2026-06-16
Weakness: CWE-20

Description

The server in Microsoft Active Directory on Windows Server 2003 SP2 does not properly handle an update request for a service principal name (SPN), which allows remote attackers to cause a denial of service (authentication downgrade or outage) via a crafted request that triggers name collisions, aka "Active Directory SPN Validation Vulnerability."

Affected products

Microsoft Windows 2003 Server: all versions

References

http://osvdb.org/70825
http://secunia.com/advisories/43215
http://www.securityfocus.com/bid/46145
http://www.securitytracker.com/id?1025042
http://www.vupen.com/english/advisories/2011/0319
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-005
https://exchange.xforce.ibmcloud.com/vulnerabilities/64915
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12485
http://osvdb.org/70825
http://secunia.com/advisories/43215
http://www.securityfocus.com/bid/46145
http://www.securitytracker.com/id?1025042

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