CVE-2011-0040

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."

Category

5.0
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 41.39% Top 5%
Vendor Advisory microsoft.com Vendor Advisory secunia.com Vendor Advisory vupen.com
Affected: n/a n/a
Published at:
Updated at:

References

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

Frequently Asked Questions

What is the severity of CVE-2011-0040?
CVE-2011-0040 has been scored as a medium severity vulnerability.
How to fix CVE-2011-0040?
To fix CVE-2011-0040, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2011-0040 being actively exploited in the wild?
It is possible that CVE-2011-0040 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~41% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.