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CVE-2011-0040

5.0 · MEDIUM

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…

Published Feb 9, 2011microsoftCWE-20EPSS 22.76%

Overview

CVE-2011-0040 is a medium-severity vulnerability affecting microsoft windows_2003_server. It was published on February 9, 2011 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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."

Remediation

Check the references section for vendor advisories and patches from microsoft. Update windows_2003_server to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus

References

Refosvdb.org/70825Refsecunia.com/advisories/43215Refwww.securityfocus.com/bid/46145Refwww.securitytracker.com/id?1025042Refwww.vupen.com/english/advisories/2011/0319Refdocs.microsoft.com/en-us/security-updates/securitybulletins/2011/ms11-005Refexchange.xforce.ibmcloud.com/vulnerabilities/64915Refoval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12485Refosvdb.org/70825Refsecunia.com/advisories/43215

How CyberStrike helps

Frequently asked questions

What is CVE-2011-0040?

CVE-2011-0040 is a medium-severity vulnerability affecting microsoft windows_2003_server. It was published on February 9, 2011 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

How severe is CVE-2011-0040?

This vulnerability has a CVSS 2.0 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2011-0040?

Check the references section for vendor advisories and patches from microsoft. Update windows_2003_server to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2011-0040?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2011-0040 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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