Technical Information

Brief overview of the risk:
This security update resolves two privately reported vulnerabilities in implementations of Active Directory on Microsoft Windows 2000 Server and Windows Server 2003, and Active Directory Application Mode (ADAM) when installed on Windows XP Professional and Windows Server 2003.
Detailed Information on the risk:
A denial of service vulnerability exists in implementations of Active Directory on Microsoft Windows 2000 Server and Windows Server 2003. The vulnerability also exists in implementations of Active Directory Application Mode (ADAM) when installed on Windows XP Professional and Windows Server 2003. The vulnerability is due to improper memory management during execution of certain types of LDAP or LDAPS requests. An attacker who successfully exploited this vulnerability could cause the affected server to stop respondingFurther information on this exploit is available at : MS09-018