Microsoft Security Bulletin MS13-079 – Important: Vulnerability in Active Directory Could Allow Denial of Service (2853587)

Vulnerability in Active Directory Could Allow Denial of Service (2853587)

Executive Summary

This security update resolves a privately reported vulnerability in Active Directory. The vulnerability could allow denial of service if an attacker sends a specially crafted query to the Lightweight Directory Access Protocol (LDAP) service.

This security update is rated Important for Active Directory Lightweight Directory Service (AD LDS) and Active Directory Services where affected on Windows Vista, Windows Server 2008, Windows 7, Windows Server 2008 R2, Windows 8, and Windows Server 2012.

The security update addresses the vulnerability by correcting how the LDAP directory service handles specially crafted LDAP queries. For more information about the vulnerability, see the Frequently Asked Questions (FAQ) subsection for the specific vulnerability entry under the next section, Vulnerability Information.

Recommendation. Most customers have automatic updating enabled and will not need to take any action because this security update will be downloaded and installed automatically. Customers who have not enabled automatic updating need to check for updates and install this update manually. For information about specific configuration options in automatic updating, see Microsoft Knowledge Base Article 294871.

For administrators and enterprise installations, or end users who want to install this security update manually, Microsoft recommends that customers apply the update at the earliest opportunity using update management software, or by checking for updates using the Microsoft Update service.