National Cyber Awareness System

Vulnerability Summary for CVE-2011-0040

Overview

The server in Microsoft Active Directory on Windows Server 2003 SP2 does not properly handle an update request for a service principal name (SPN), which allows remote attackers to cause a denial of service (authentication downgrade or outage) via a crafted request that triggers name collisions, aka "Active Directory SPN Validation Vulnerability."

Impact

CVSS Severity (version 2.0):

CVSS Version 2 Metrics:

References to Advisories, Solutions, and Tools

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External Source: MS

Name: MS11-005

Type: Advisory; Patch Information

Hyperlink:http://www.microsoft.com/technet/security/Bulletin/MS11-005.mspx

External Source: XF

Name: ms-win-active-directory-dos(64915)

Hyperlink:http://xforce.iss.net/xforce/xfdb/64915

External Source: VUPEN

Name: ADV-2011-0319

Type: Advisory

Hyperlink:http://www.vupen.com/english/advisories/2011/0319

External Source: SECTRACK

Name: 1025042

Hyperlink:http://www.securitytracker.com/id?1025042

External Source: BID

Name: 46145

Hyperlink:http://www.securityfocus.com/bid/46145

External Source: SECUNIA

Name: 43215

Type: Advisory

Hyperlink:http://secunia.com/advisories/43215

External Source: OVAL

Name: oval:org.mitre.oval:def:12485

Hyperlink:http://oval.mitre.org/repository/data/getDef?id=oval:org.mitre.oval:def:12485

External Source: OSVDB

Name: 70825

Hyperlink:http://osvdb.org/70825

References to Check Content

Identifier:oval:org.mitre.oval:def:12485

Check System:http://oval.mitre.org/XMLSchema/oval-definitions-5

Hyperlink:http://oval.mitre.org/repository/data/DownloadDefinition?id=oval:org.mitre.oval:def:12485