The NtSetLdtEntries function in the programming interface for the Local Descriptor Table (LDT) in Windows NT 4.0 and Windows 2000 allows local attackers to gain access to kernel memory and execute arbitrary code via an expand-down data segment descriptor descriptor that points to protected memory.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A911
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A890
https://exchange.xforce.ibmcloud.com/vulnerabilities/15707
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2004/ms04-011
http://www.us-cert.gov/cas/techalerts/TA04-104A.html
http://www.securityfocus.com/bid/10122
http://www.kb.cert.org/vuls/id/122076
http://www.eeye.com/html/Research/Advisories/AD20040413D.html
http://www.ciac.org/ciac/bulletins/o-114.shtml
http://lists.grok.org.uk/pipermail/full-disclosure/2004-April/020068.html