Microsoft Security Bulletin Summary for November 2009: http://www.microsoft.com/technet/security/Bulletin/MS09-nov.mspx MS09-066 Vulnerability in Active Directory Could Allow Denial of Service (973309) This security update resolves a privately reported vulnerability in Active Directory directory service, Active Directory Application Mode (ADAM), and Active Directory Lightweight Directory Service (AD LDS). The vulnerability could allow denial of service if stack space was exhausted during execution of certain types of LDAP or LDAPS requests.