MS-CHAP Authentication Bypass Vulnerability
Severity: CRITICAL
CVE Identifier: CVE-2009-3677
Advisory Date: FEB 15, 2011
DESCRIPTION
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."
TREND MICRO PROTECTION INFORMATION
Trend Micro Deep Security shields networks through Deep Packet Inspection (DPI) rules. Trend Micro customers using OfficeScan with Intrusion Defense Firewall (IDF) plugin are also protected from attacks using these vulnerabilities. Please refer to the filter number and filter name when applying appropriate DPI and/or IDF rules.
SOLUTION
Trend Micro Deep Security DPI Rule Number: 1003871
Trend Micro Deep Security DPI Rule Name: 1003871 - MS-CHAP Authentication Bypass Vulnerability
AFFECTED SOFTWARE AND VERSION
- microsoft windows_2000
- microsoft windows_server_2003
- microsoft windows_server_2008
- microsoft windows_vista
- microsoft windows_xp
- microsoft windows_xp -
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