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MS-CHAP Authentication Bypass Vulnerability

oval:org.mitre.oval:def:6209

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."

Family:
windows
Status:
ACCEPTED
Platform(s):
  • Microsoft Windows Vista
  • Microsoft Windows 2000
  • Microsoft Windows Server 2003
  • Microsoft Windows Server 2008
  • Microsoft Windows XP
Class:
vulnerability
Reference(s):
  • CVE-2009-3677
Product(s):