The Windows Internet Naming Service (WINS) in Windows NT Server 4.0 SP 6a NT Terminal Server 4.0 SP 6 Windows 2000 Server SP3 and SP4 and Windows Server 2003 does not properly validate the computer name value in a WINS packet which allows remote attackers to execute arbitrary code or cause a denial of service (server crash) which results in an \unchecked buffer\ and possibly triggers a buffer overflow aka the \Name Validation Vulnerability.\