Vulnerability in Microsoft ISA server

Severity: Critical Systems affected: ISA Server 2000, Small Business Server 2000/2003 "A security vulnerability exists in the H.323 filter for Microsoft Internet Security and Acceleration Server 2000 that could allow an attacker to overflow a buffer in the Microsoft Firewall Service in Microsoft Internet Security and Acceleration Server 2000. An attacker who successfully exploited this vulnerability could try to run code of their choice in the security context of the Microsoft Firewall Service. This would give the attacker complete control over the system. The H.323 filter is enabled by default on servers running ISA Server 2000 computers that are installed in integrated or firewall mode." For fix details see the full bulletin at the link below: http://www.microsoft.com/technet/security/bulletin/MS04-001.asp

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