This host is missing a critical security update according to Microsoft Bulletin MS11-086.

Successful exploitation will allow the remote attackers to use revoked certificate to authenticate to the Active Directory domain and gain access to network resources or run code under the privileges of a specific authorized user with which the certificate is associated. Impact Level: System/Application.

Run Windows Update and update the listed hotfixes or download and update mentioned hotfixes in the advisory from the below link, http://www.microsoft.com/technet/security/bulletin/ms1-086.mspx

The flaw is due to an error in Active Directory when configured to use LDAP over SSL. It fails to validate the revocation status of an SSL certificate against the CRL (Certificate Revocation List) associated with the domain account. This can be exploited to authenticate to the Active Directory domain using a revoked certificate.

Microsoft Windows 7 Service Pack 1 and prior Microsoft Windows XP Service Pack 3 and prior Microsoft Windows Vista Service Pack 2 and prior Microsoft Windows Server 2003 Service Pack 2 and prior Microsoft Windows Server 2008 Service Pack 2 and prior

• http://secunia.com/advisories/46755/
• http://support.microsoft.com/kb/2601626
• http://support.microsoft.com/kb/2616310
• http://technet.microsoft.com/en-us/security/bulletin/ms11-086

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Updated on 2015-03-25