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SANS Top 20 Vulnerabilities - The Experts Consensus

Top Vulnerabilities to Windows Systems

W1 Internet Information Services (IIS)
W2 Microsoft SQL Server (MSSQL)
W3 Windows Authentication
W4 Internet Explorer (IE)
W5 Windows Remote Access Services
W6 Microsoft Data Access Components (MDAC)
W7 Windows Scripting Host (WSH)
W8 Microsoft Outlook Outlook Express
W9 Windows Peer to Peer File Sharing (P2P)
W10 Simple Network Management Protocol (SNMP)

Top Vulnerabilities to UNIX Systems

U1 BIND Domain Name System
U2 Remote Procedure Calls (RPC)
U3 Apache Web Server
U4 General UNIX Authentication Accounts with No Passwords or Weak Passwords
U5 Clear Text Services
U6 Sendmail
U7 Simple Network Management Protocol (SNMP)
U8 Secure Shell (SSH)
U9 Misconfiguration of Enterprise Services NIS/NFS
U10 Open Secure Sockets Layer (SSL)

やっぱりBIND。Sendmailが6位。もっと上位かと思ったのだけれども、それは俺の偏見か。