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Last updated: 4/23/2014

CVE Publication rate: 20.5

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National Cyber Awareness System

Vulnerability Summary for CVE-2009-3677

Original release date: 12/09/2009
Last revised: 08/21/2010
Source: US-CERT/NIST

Overview

The Internet Authentication Service (IAS) in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP2, Vista Gold and SP1, and Server 2008 Gold does not properly verify the credentials in an MS-CHAP v2 Protected Extensible Authentication Protocol (PEAP) authentication request, which allows remote attackers to access network resources via a malformed request, aka "MS-CHAP Authentication Bypass Vulnerability."

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score: 10.0 (HIGH) (AV:N/AC:L/AU:N/C:C/I:C/A:C) (legend)
Impact Subscore: 10.0
Exploitability Subscore: 10.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type: Allows unauthorized disclosure of information; Allows unauthorized modification; Allows disruption of service

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US-CERT Vulnerability Note: CERT
Name: TA09-342A
External Source: MS
Name: MS09-071
External Source: SECTRACK
Name: 1023291
External Source: OVAL
Name: oval:org.mitre.oval:def:6209

References to Check Content

Identifier: oval:org.mitre.oval:def:6209
Check System: http://oval.mitre.org/XMLSchema/oval-definitions-5

Technical Details

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