Microsoft Windows Active Directory LDAPS Request improper authentication

CVSS Meta Temp Score
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CTI Interest Score
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7.7$0-$5k0.00

A vulnerability, which was classified as critical, was found in Microsoft Windows (Operating System) (affected version not known). Affected is some unknown functionality of the component Active Directory. The manipulation as part of a LDAPS Request leads to a improper authentication vulnerability. CWE is classifying the issue as CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. This is going to have an impact on confidentiality, and integrity. CVE summarizes:

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."

The weakness was published 11/08/2011 by Xavier Lassoie Sébastien Godard with Autosécurité as MS11-086 as confirmed bulletin (Technet). The advisory is shared for download at technet.microsoft.com. This vulnerability is traded as CVE-2011-2014 since 05/09/2011. It is possible to launch the attack remotely. A authentication is required for exploitation. There are neither technical details nor an exploit publicly available.

As 0-day the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 56739 (MS11-086: Vulnerability in Active Directory Could Allow Elevation of Privilege (2630837)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows : Microsoft Bulletins and running in the context l.

Upgrading eliminates this vulnerability. Applying the patch MS11-086 is able to eliminate this problem. The bugfix is ready for download at technet.microsoft.com. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published immediately after the disclosure of the vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 16297.

The vulnerability is also documented in the vulnerability database at Tenable (56739). Similar entries are available at 4439, 4436 and 4438.

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CPE 2.3info

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CVSSv4info

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CVSSv3info

VulDB Meta Base Score: 8.1
VulDB Meta Temp Score: 7.7

VulDB Base Score: 8.1
VulDB Temp Score: 7.7
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CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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Exploitinginfo

Class: Improper authentication
CWE: CWE-287
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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EPSS Percentile: 🔍

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Nessus ID: 56739
Nessus Name: MS11-086: Vulnerability in Active Directory Could Allow Elevation of Privilege (2630837)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 902487
OpenVAS Name: Microsoft Windows Active Directory LDAPS Authentication Bypass Vulnerability (2630837)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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Patch: MS11-086
TippingPoint: 🔍
ISS Proventia IPS: 🔍
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Timelineinfo

05/09/2011 🔍
11/08/2011 +182 days 🔍
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11/08/2011 +0 days 🔍
11/08/2011 +0 days 🔍
11/09/2011 +1 days 🔍
11/21/2011 +12 days 🔍
03/19/2021 +3406 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: MS11-086
Researcher: Xavier Lassoie Sébastien Godard
Organization: Autosécurité
Status: Confirmed

CVE: CVE-2011-2014 (🔍)
OVAL: 🔍

Vulnerability Center: 33760 - [MS11-086] Microsoft Windows Active Directory LDAPS Authentication Bypass Vulnerability, High
SecurityFocus: 50570
Secunia: 46755 - Microsoft Windows Active Directory LDAPS Authentication Bypass, Less Critical

See also: 🔍

Entryinfo

Created: 11/21/2011 01:00
Updated: 03/19/2021 17:50
Changes: 11/21/2011 01:00 (81), 04/04/2017 16:57 (6), 03/19/2021 17:43 (4), 03/19/2021 17:50 (1)
Complete: 🔍

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