CVE-2001-0546
Memory leak in H.323 Gatekeeper Service in Microsoft Internet Security and Acceleration (ISA) Server 2000 allows remote attackers to cause a denial of service (resource exhaustion) via a large amount of malformed H.323 data.
Date published : 2002-03-09
http://www.securityfocus.com/bid/3196
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2001/ms01-045