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             AUSCERT External Security Bulletin Redistribution

 Vulnerability in Active Directory Could Allow Denial of Service (2853587)
                             11 September 2013


        AusCERT Security Bulletin Summary

Product:           Active Directory
Publisher:         Microsoft
Operating System:  Windows
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2013-3868  

Original Bulletin: 

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Microsoft Security Bulletin MS13-079 - Important

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

Published Date: September 10, 2013

Version: 1.0

General Information

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. 

Affected Software

Windows Vista Service Pack 2 
Windows Vista x64 Edition Service Pack 2 
Windows Server 2008 for 32-bit Systems Service Pack 2
Windows Server 2008 for x64-based Systems Service Pack 2  
Windows 7 for 32-bit Systems Service Pack 1 
Windows 7 for x64-based Systems Service Pack 1 
Windows Server 2008 R2 for x64-based Systems Service Pack 1 
Windows 8 for 32-bit Systems 
Windows 8 for 64-bit Systems 
Windows Server 2012 
Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core 
Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core 
Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core 
Windows Server 2012 (Server Core installation)

Vulnerability Information

Remote Anonymous DoS Vulnerability - CVE-2013-3868

A denial of service vulnerability exists in implementations of Active 
Directory Services and AD LDS that could cause the LDAP directory service to 
stop responding until an administrator restarts the service. The vulnerability 
is caused when the LDAP directory service fails to handle a specially crafted 

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