ID CVE-2011-2014
Summary The LDAP over SSL (aka LDAPS) implementation in Active Directory, Active Directory Application Mode (ADAM), and Active Directory Lightweight Directory Service (AD LDS) in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 does not examine Certificate Revocation Lists (CRLs), which allows remote authenticated users to bypass intended certificate restrictions and access Active Directory resources by leveraging a revoked X.509 certificate for a domain account, aka "LDAPS Authentication Bypass Vulnerability."
References
Vulnerable Configurations
  • Microsoft Windows 7
    cpe:2.3:o:microsoft:windows_7
  • Microsoft Windows 7 64-bit Service Pack 1 (initial release)
    cpe:2.3:o:microsoft:windows_7:-:sp1:x64
  • Microsoft Windows 7 x86 Service Pack 1
    cpe:2.3:o:microsoft:windows_7:-:sp1:x86
  • Microsoft Windows Server 2003 Service Pack 2
    cpe:2.3:o:microsoft:windows_server_2003:-:sp2
  • Windows Server 2008 Service Pack 2 for 32-bit systems
    cpe:2.3:o:microsoft:windows_server_2008:-:sp2:x32
  • Microsoft Windows Server 2008 Service Pack 2 x64 (64-bit)
    cpe:2.3:o:microsoft:windows_server_2008:-:sp2:x64
  • Windows Server 2008 R2 for 32-bit Systems
    cpe:2.3:o:microsoft:windows_server_2008:r2:-:x64
  • Microsoft Windows Server 2008 R2 Service Pack 1 x64 (64-bit)
    cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:x64
  • Microsoft Windows Vista Service Pack 2
    cpe:2.3:o:microsoft:windows_vista:-:sp2
  • Microsoft Windows Vista Service Pack 2 x64 (64-bit)
    cpe:2.3:o:microsoft:windows_vista:-:sp2:x64
  • Microsoft Windows XP Service Pack 3
    cpe:2.3:o:microsoft:windows_xp:-:sp3
  • Microsoft Windows XP Service Pack 2 x64 (64-bit)
    cpe:2.3:o:microsoft:windows_xp:-:sp2:x64
CVSS
Base: 9.0 (as of 09-11-2011 - 09:54)
Impact:
Exploitability:
CWE CWE-287
CAPEC
  • Authentication Abuse
    An attacker obtains unauthorized access to an application, service or device either through knowledge of the inherent weaknesses of an authentication mechanism, or by exploiting a flaw in the authentication scheme's implementation. In such an attack an authentication mechanism is functioning but a carefully controlled sequence of events causes the mechanism to grant access to the attacker. This attack may exploit assumptions made by the target's authentication procedures, such as assumptions regarding trust relationships or assumptions regarding the generation of secret values. This attack differs from Authentication Bypass attacks in that Authentication Abuse allows the attacker to be certified as a valid user through illegitimate means, while Authentication Bypass allows the user to access protected material without ever being certified as an authenticated user. This attack does not rely on prior sessions established by successfully authenticating users, as relied upon for the "Exploitation of Session Variables, Resource IDs and other Trusted Credentials" attack patterns.
  • Exploiting Trust in Client (aka Make the Client Invisible)
    An attack of this type exploits a programs' vulnerabilities in client/server communication channel authentication and data integrity. It leverages the implicit trust a server places in the client, or more importantly, that which the server believes is the client. An attacker executes this type of attack by placing themselves in the communication channel between client and server such that communication directly to the server is possible where the server believes it is communicating only with a valid client. There are numerous variations of this type of attack.
  • Utilizing REST's Trust in the System Resource to Register Man in the Middle
    This attack utilizes a REST(REpresentational State Transfer)-style applications' trust in the system resources and environment to place man in the middle once SSL is terminated. Rest applications premise is that they leverage existing infrastructure to deliver web services functionality. An example of this is a Rest application that uses HTTP Get methods and receives a HTTP response with an XML document. These Rest style web services are deployed on existing infrastructure such as Apache and IIS web servers with no SOAP stack required. Unfortunately from a security standpoint, there frequently is no interoperable identity security mechanism deployed, so Rest developers often fall back to SSL to deliver security. In large data centers, SSL is typically terminated at the edge of the network - at the firewall, load balancer, or router. Once the SSL is terminated the HTTP request is in the clear (unless developers have hashed or encrypted the values, but this is rare). The attacker can utilize a sniffer such as Wireshark to snapshot the credentials, such as username and password that are passed in the clear once SSL is terminated. Once the attacker gathers these credentials, they can submit requests to the web service provider just as authorized user do. There is not typically an authentication on the client side, beyond what is passed in the request itself so once this is compromised, then this is generally sufficient to compromise the service's authentication scheme.
  • Man in the Middle Attack
    This type of attack targets the communication between two components (typically client and server). The attacker places himself in the communication channel between the two components. Whenever one component attempts to communicate with the other (data flow, authentication challenges, etc.), the data first goes to the attacker, who has the opportunity to observe or alter it, and it is then passed on to the other component as if it was never intercepted. This interposition is transparent leaving the two compromised components unaware of the potential corruption or leakage of their communications. The potential for Man-in-the-Middle attacks yields an implicit lack of trust in communication or identify between two components.
Access
VectorComplexityAuthentication
NETWORK LOW SINGLE_INSTANCE
Impact
ConfidentialityIntegrityAvailability
COMPLETE COMPLETE COMPLETE
msbulletin via4
bulletin_id MS11-086
bulletin_url
date 2011-11-08T00:00:00
impact Elevation of Privilege
knowledgebase_id 2630837
knowledgebase_url
severity Important
title Vulnerability in Active Directory Could Allow Elevation of Privilege
nessus via4
NASL family Windows : Microsoft Bulletins
NASL id SMB_NT_MS11-086.NASL
description The remote Windows host has a version of Active Directory that fails to validate the revocation status of an SSL certificate against the CRL (Certificate Revocation List) associated with the domain account. When Active Directory is configured to use LDAP over SSL, a remote attacker can exploit this and use a previously revoked certificate to authenticate to the Active Directory domain as the user associated with that certificate. This would give him access to the network resources or ability to run code on the affected host, subject to the privileges of that user.
last seen 2019-02-21
modified 2018-11-15
plugin id 56739
published 2011-11-08
reporter Tenable
source https://www.tenable.com/plugins/index.php?view=single&id=56739
title MS11-086: Vulnerability in Active Directory Could Allow Elevation of Privilege (2630837)
oval via4
accepted 2014-04-07T04:00:17.200-04:00
class vulnerability
contributors
  • name Dragos Prisaca
    organization Symantec Corporation
  • name Dragos Prisaca
    organization Symantec Corporation
  • name Maria Kedovskaya
    organization ALTX-SOFT
  • name Pooja Shetty
    organization SecPod Technologies
definition_extensions
  • comment Microsoft Windows XP (x86) SP3 is installed
    oval oval:org.mitre.oval:def:5631
  • comment Microsoft Windows XP x64 Edition SP2 is installed
    oval oval:org.mitre.oval:def:4193
  • comment Microsoft Windows Server 2003 SP2 (x86) is installed
    oval oval:org.mitre.oval:def:1935
  • comment Microsoft Windows Server 2003 SP2 (x64) is installed
    oval oval:org.mitre.oval:def:2161
  • comment Microsoft Windows Server 2003 (ia64) SP2 is installed
    oval oval:org.mitre.oval:def:1442
  • comment Microsoft Windows Vista (32-bit) Service Pack 2 is installed
    oval oval:org.mitre.oval:def:6124
  • comment Microsoft Windows Vista x64 Edition Service Pack 2 is installed
    oval oval:org.mitre.oval:def:5594
  • comment Microsoft Windows Server 2008 (32-bit) Service Pack 2 is installed
    oval oval:org.mitre.oval:def:5653
  • comment Microsoft Windows Server 2008 x64 Edition Service Pack 2 is installed
    oval oval:org.mitre.oval:def:6216
  • comment Microsoft Windows 7 (32-bit) is installed
    oval oval:org.mitre.oval:def:6165
  • comment Microsoft Windows 7 x64 Edition is installed
    oval oval:org.mitre.oval:def:5950
  • comment Microsoft Windows Server 2008 R2 x64 Edition is installed
    oval oval:org.mitre.oval:def:6438
  • comment Microsoft Windows 7 (32-bit) Service Pack 1 is installed
    oval oval:org.mitre.oval:def:12292
  • comment Microsoft Windows 7 x64 Service Pack 1 is installed
    oval oval:org.mitre.oval:def:12627
  • comment Microsoft Windows Server 2008 R2 x64 Service Pack 1 is installed
    oval oval:org.mitre.oval:def:12567
description The LDAP over SSL (aka LDAPS) implementation in Active Directory, Active Directory Application Mode (ADAM), and Active Directory Lightweight Directory Service (AD LDS) in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 does not examine Certificate Revocation Lists (CRLs), which allows remote authenticated users to bypass intended certificate restrictions and access Active Directory resources by leveraging a revoked X.509 certificate for a domain account, aka "LDAPS Authentication Bypass Vulnerability."
family windows
id oval:org.mitre.oval:def:13278
status accepted
submitted 2011-11-08T13:00:00
title LDAPS Authentication Bypass Vulnerability
version 75
refmap via4
ms MS11-086
sectrack 1026294
Last major update 14-02-2012 - 23:08
Published 08-11-2011 - 16:55
Last modified 26-02-2019 - 09:04
Back to Top