Microsoft IIS Hex Encoded WebDAV Requests Authentication Bypass Vulnerability

Publish date: February 15, 2011
  Severity: HIGH
  CVE Identifier: CVE-2009-1122,MS09-020
  Advisory Date: FEB 15, 2011

  DESCRIPTION

 The WebDAV extension in Microsoft Internet Information Services (IIS) 5.0 on Windows 2000 SP4 does not properly decode URLs, which allows remote attackers to bypass authentication, and possibly read or create files, via a crafted HTTP request, aka "IIS 5.0 WebDAV Authentication Bypass Vulnerability," a different vulnerability than CVE-2009-1535.

  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: 1003557
  Trend Micro Deep Security DPI Rule Name: 1003557 - Microsoft IIS Hex Encoded WebDAV Requests Authentication Bypass Vulnerability

  AFFECTED SOFTWARE AND VERSION

  • microsoft iis 5.0

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