||Home : Advisories : IIS Buffer Overflow|
||IIS Buffer Overflow
||18th June 1999
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CERT Advisory CA-99-07 IIS Buffer Overflow
Revised: June 18, 1999
Originally released: June 16, 1999
* Machines running Microsoft Internet Information Server 4.0
Buffer overflow vulnerabilities affecting Microsoft Internet
Information Server 4.0 have been discovered in several libraries,
including libraries that handle .HTR, .STM, and .IDC files.
A tool to exploit at least one of the vulnerabilities has been
These vulnerabilities allow remote intruders to execute arbitrary code
with the privileges of the IIS server. Additionally, intruders can use
this vulnerability to crash vulnerable IIS processes.
Microsoft has released and updated Microsoft Security Bulletin
MS99-019, which points to a patch for these vulnerabilities. We
encourage you to read this bulletin, available from
We will update this advisory as more information becomes available.
Please check the CERT/CC Web site for the most current revision.
Our thanks to Jason Garms and Scott Culp of Microsoft for providing
information contained in this advisory.
This document is available from:
CERT/CC Contact Information
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June 16, 1999: Initial release
June 18, 1999: Added information about .STM and .IDC files.
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