Unspecified vulnerability in the kernel in Microsoft Windows 2000 SP4, probably a buffer overflow, allows local users to obtain privileges via unspecified vectors involving an "unchecked buffer."
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A673
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2006/ms06-049
http://www.vupen.com/english/advisories/2006/3215
http://www.securityfocus.com/bid/19388