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Vulnerability Alert

Microsoft Active Directory LDAP Service Denial of Service Vulnerability

 
Threat Type:CWE-399: Resource Management Errors
IntelliShield ID:30573
Version:3
First Published:2013 September 10 17:16 GMT
Last Published:2013 September 25 19:43 GMT
Port: Not available
CVE:CVE-2013-3868
BugTraq ID:62184
Urgency:Unlikely Use
Credibility:Confirmed
Severity:Mild Damage
CVSS Base:5.0 CVSS Calculator
CVSS Version 2.0
CVSS Temporal:3.7
Related Resources:
View related IPS SignatureView related Applied Mitigation BulletinView related Event Response
 
 
Version Summary:IntelliShield has updated this alert to report a decrease in intrusion prevention system activity that is related to the Microsoft Active Directory LDAP service denial of service vulnerability.
 
 
Description
Microsoft Active Directory contains a vulnerability that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on a targeted system.

The vulnerability is due to improper handling of Lightweight Directory Access Protocol (LDAP) requests by the Active Directory LDAP service. An unauthenticated, remote attacker could exploit the vulnerability by sending malicious LDAP requests to the system. If successful, the attacker could cause the affected service to stop responding, resulting in a DoS condition.

Microsoft has confirmed the vulnerability in a security bulletin and released software updates.
 
Warning Indicators
Microsoft Active Directory and Active Directory Lightweight Services are affected when running on the following platforms:
  • Windows Vista SP 2 and prior
  • Windows Vista x64 Edition SP 2 and prior
  • Windows Server 2008 for 32-bit Systems SP 2 and prior
  • Windows Server 2008 for x64-based Systems SP 2 and prior
  • Windows 7 for 32-bit Systems SP 1 and prior
  • Windows 7 for x64-based Systems SP 1 and prior
  • Windows Server 2008 R2 for x64-based Systems SP 1 and prior
  • Windows 8 for 32-bit and 64-bit Systems
  • Windows Server 2012
 
IntelliShield Analysis
Although attackers can exploit the vulnerability remotely without authentication, it is likely that many environments would require an attacker to access a trusted, internal network to initiate an attack. As a matter of best practice, most environments limit access to directory services, reducing the potential for exploitation.

Event data from Cisco Remote Management Services has detected intrusion prevention system signature activity related to this vulnerability. The data, which was captured on September 24, 2013, could indicate that exploits have occurred in the wild.

The Cisco Applied Intelligence team has created an Applied Mitigation Bulletin to address vulnerabilities that Microsoft disclosed in the September 2013 security bulletin release. This Cisco bulletin, which assists administrators in identifying or mitigating these vulnerabilities using Cisco devices, is available at the following link: Cisco Applied Mitigation Bulletin: Microsoft Security Bulletin Release for September 2013.
 
Vendor Announcements
Microsoft has released a security bulletin at the following link: MS13-079
 
Impact
An unauthenticated, remote attacker could exploit this vulnerability to cause the Active Directory LDAP service to become unresponsive, resulting in a DoS condition. The failure of the Active Directory LDAP service may impact systems and applications that refer to the affected system for directory or login services, possibly impacting a number of other systems in the event of a successful attack.
 
Technical Information
The vulnerability is due to improper processing of LDAP requests by the Active Directory LDAP service.

An unauthenticated, remote attacker could exploit this vulnerability by sending malicious LDAP requests to the targeted system. The processing of the requests could cause the service to stop responding, resulting in a DoS condition.
 
Safeguards
Administrators are advised to apply the appropriate updates.

Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.

Administrators are advised to monitor affected systems.
 
Patches/Software
Microsoft customers can obtain updates directly by using the links in the security bulletin. These updates are also distributed by Windows automatic update features and available on the Microsoft Update service. Microsoft Windows Server Update Services (WSUS), Systems Management Server, and System Center Configuration Manager can assist administrators in deploying software updates.

Signatures
 
Cisco Intrusion Prevention System (IPS) 6.0
Signature IDSignature NameReleaseLatest Release Date
2769/0Microsoft Active Directory LDAP Service Denial of Service VulnerabilityS7412013 Sep 10 
 
Alert History
 

Version 2, September 19, 2013, 1:44 PM: IntelliShield has updated this alert to report an increase in intrusion prevention system activity that is related to the Microsoft Active Directory LDAP service denial of service vulnerability.

Version 1, September 10, 2013, 5:16 PM: Microsoft Active Directory contains a vulnerability that could allow an unauthenticated, remote attacker to execute arbitrary code on a targeted system. Updates are available.


Product Sets
 
The security vulnerability applies to the following combinations of products.

Primary Products:
Microsoft, Inc.Windows 7 for 32-bit systems Base, SP1 | for x64-based systems Base, SP1
Microsoft, Inc.Windows Server 2008 Datacenter Edition Base, SP1, SP2 | Datacenter Edition, 64-bit Base, SP1, SP2 | Itanium-Based Systems Edition Base, SP1, SP2 | Enterprise Edition Base, SP1, SP2 | Enterprise Edition, 64-bit Base, SP1, SP2 | Essential Business Server Standard Base, SP1, SP2 | Essential Business Server Premium Base, SP1, SP2 | Essential Business Server Premium, 64-bit Base, SP1, SP2 | Standard Edition Base, SP1, SP2 | Standard Edition, 64-bit Base, SP1, SP2 | Web Server Base, SP1, SP2 | Web Server, 64-bit Base, SP1, SP2
Microsoft, Inc.Windows Server 2008 R2 x64-Based Systems Edition Base, SP1 | Itanium-Based Systems Edition Base, SP1
Microsoft, Inc.Windows Server 2012 Original Release Base
Microsoft, Inc.Windows Vista Home Basic Base, SP1, SP2 | Home Premium Base, SP1, SP2 | Business Base, SP1, SP2 | Enterprise Base, SP1, SP2 | Ultimate Base, SP1, SP2 | Home Basic x64 Edition Base, SP1, SP2 | Home Premium x64 Edition Base, SP1, SP2 | Business x64 Edition Base, SP1, SP2 | Enterprise x64 Edition Base, SP1, SP2 | Ultimate x64 Edition Base, SP1, SP2
Microsoft, Inc.Windows 8 for 32-bit systems Base | for x64-based systems Base

Associated Products:
N/A




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