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Microsoft Security Bulletin MS99-023 - Important

Patch Available for "Malformed Image Header" Vulnerability

Published: June 30, 1999 | Updated: March 10, 2003

Version: 2.0

Patch Availability Information Updated: March 10, 2003
Originally Posted: June 30, 1999

Summary

Microsoft has released a patch that eliminates a vulnerability that could allow denial of service attacks against Microsoft® Windows NT® servers, workstations, and terminal servers. This patch already is available as part of Windows NT Server Service Pack 5, but is being provided as a stand-alone patch for the benefit of users who have entered Y2K lockdown on Service Pack 4.

Frequently asked questions regarding this vulnerability can be found at http://www.microsoft.com/technet/security/bulletin/fq99-023.mspx

Issue

If an executable file with a specially-malformed image header is executed, it will cause a system failure. The affected machine will need to be rebooted in order to place it back in service. Any work that was in progress when the machine crashed could be lost.

Affected Software Versions

  • Microsoft Windows NT Server 4.0
  • Microsoft Windows NT Workstation 4.0
  • Microsoft Windows NT Server 4.0, Terminal Server Edition

Vulnerability Identifier: CVE-1999-0726

Patch Availability

More Information

Please see the following references for more information related to this issue.

Obtaining Support on this Issue

This is a fully supported patch. Information on contacting Microsoft Technical Support is available at http://support.microsoft.com/contactussupport/?ws=support.

Revisions

  • June 30, 1999: Bulletin Created.
  • V2.0 (March 10, 2003): Introduced versioning and updated patch availability information

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