CVE-2011-0040 Denial of service in n/a

What is CVE-2011-0040?

CVE-2011-0040 is a medium-severity denial of service vulnerability in Microsoft Windows 2003 Server, published on 9 Feb 2011. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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."

Weakness: CWE-20

Which versions are affected by CVE-2011-0040?

It affects 1 product.

Products include Microsoft Windows 2003 Server.

How do I fix CVE-2011-0040?

No fix has been published for CVE-2011-0040 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2011-0040 being exploited?

There is no known exploitation of CVE-2011-0040 in the wild and no public exploit code.

Other vulnerabilities in Microsoft Windows 2003 Server

• CVE-2008-0015 Microsoft Windows Video ActiveX Control Remote Code Execution Exploited High 8.8
• CVE-2015-1701 Microsoft Win32k Privilege Escalation Exploited High 7.8
• CVE-2013-5065 Microsoft Windows Kernel Privilege Escalation Exploited High 7.8
• CVE-2011-1268 Code injection in n/a Critical 10.0
• CVE-2011-1868 Memory corruption in n/a Critical 10.0

All Microsoft Windows 2003 Server vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-9w6c-58mr-5mwx.