Microsoft Security Bulletin MS00-001 - Critical

Patch Available for "Malformed IMAP Request" Vulnerability

Published: January 04, 2000

Version: 1.0

Originally Posted: January 04, 2000

Summary

Microsoft has released a patch that eliminates a vulnerability in the Microsoft® Commercial Internet System (MCIS) Mail server. The vulnerability could allow a malicious user to remotely cause services on the server to fail, or cause arbitrary code to run on the server.

Frequently asked questions regarding this vulnerability can be found at https://www.microsoft.com/technet/security/bulletin/fq00-001.mspx.

General Information

Issue

The IMAP service included in MCIS Mail has an unchecked buffer. If a malformed request containing random data were passed to the service, it could cause the web publishing, IMAP, SMTP, LDAP and other services to crash. If the malformed request contained specially crafted data, it could also be used to run arbitrary code on the server via a classic buffer overrun attack.

Affected Software Versions

Microsoft Commercial Internet System 2.0 and 2.5.

Vulnerability Identifier: CVE-2000-0053

Patch Availability

Intel:
https://www.microsoft.com/Downloads/details.aspx?displaylang=en&FamilyID;=03140610-F69C-4D34-B441-32C1A2ABB1ED
Alpha:
https://www.microsoft.com/Downloads/details.aspx?displaylang=en&FamilyID;=2CC2D73F-8493-4B8A-9E47-93673A522E70

NOTE: Additional security patches are available at the Microsoft Download Center

More Information

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

Frequently Asked Questions: Microsoft Security Bulletin MS00-001, https://www.microsoft.com/technet/security/bulletin/fq00-001.mspx.
Microsoft Knowledge Base (KB) article 246731, MCIS: MCIS Mail Services unexpectedly stop, https://support.microsoft.com/default.aspx?scid=kb;en-us;246731&sd;=tech. (Note: It may take 24 hours from the original posting of this bulletin for the KB article to be visible.)
Microsoft Security web site, https://www.microsoft.com/technet/security/default.mspx.

Obtaining Support on this Issue

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

Acknowledgments

Microsoft thanks Tristan Goode for reporting this issue to us and working with us to protect customers.

Revisions

January 04, 2000: Bulletin Created.

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