Legacy Update: Get back online, activate, and install updates on your legacy Windows PC

A critical security vulnerability exists in the H.323 filter for Microsoft ISA Server 2000 that could allow an attacker to overflow a buffer on the Microsoft Firewall Service in Microsoft ISA Server 2000.

• A critical security vulnerability exists in the H.323 filter for Microsoft ISA Server 2000 that could allow an attacker to overflow a buffer on the Microsoft Firewall Service in Microsoft ISA Server 2000. The vulnerability results because the H.323 filter for the Microsoft Firewall Service does not perform proper boundary checks on specially formatted H.323 packets. An attacker who successfully exploited this vulnerably could attempt to run code of their choosing in the security context of the Microsoft Firewall Service, giving the attacker complete control over the system. ISA Servers running in cache mode are not vulnerable because the Microsoft Firewall Service is disabled by default. However, since the H.323 filter is enabled by default on systems installed in Integrated or Firewall mode, installing this security update is highly recommended.

Files

Status: Deleted This download is no longer available on microsoft.com. The downloads below are archives provided by the Internet Archive Wayback Machine from the Microsoft Download Center prior to August 2020.

File	Size
ISA2000-KB816458-x86.exe SHA1: 102c1d5475e1d0d7d84bdb859931a43d6be47c0d	229 KB

• • Microsoft Internet Security and Acceleration Server 2000 Service Pack 1
  

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