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CERT Coordination Center


Microsoft Services for UNIX Telnet server is vulnerable to denial of service via memory leak

Vulnerability Note VU#994851

Original Release Date: 2001-07-24 | Last Revised: 2001-08-07

Overview

The telnet server included in the Microsoft Services for Unix package contains a denial-of-service vulnerability that may cause the system to become unstable or crash.

Description

The telnet server included in the Microsoft Services for Unix (SFU) package contains a memory leak that can lead to excessive resource consumption on affected systems.

This vulnerability affects Microsoft Windows NT 4.0 and Windows 2000 systems that have the SFU package installed. It does not affect the telnet server that ships with Windows NT 4.0 and Windows 2000.

Impact

By sending repeated requests to an affected Microsoft telnet server, attackers can consume all available memory resources, resulting in a denial-of-service condition.

Solution

Microsoft has released the following patches to address this vulnerability

Windows NT 4.0: http://www.microsoft.com/Downloads/Release.asp?ReleaseID=31601
Windows 2000: http://www.microsoft.com/Downloads/Release.asp?ReleaseID=31595

Vendor Information

994851
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Microsoft

Updated:  August 07, 2001

Status

  Vulnerable

Vendor Statement

Microsoft has addressed this vulnerability in the following Microsoft Security Bulletin

http://www.microsoft.com/technet/security/bulletin/MS01-039.asp

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

The CERT/CC has archived Microsoft's announcement of MS01-039 at


MS01-039.txt

If you have feedback, comments, or additional information about this vulnerability, please send us email.


CVSS Metrics

Group Score Vector
Base N/A N/A
Temporal N/A N/A
Environmental N/A

References

Credit

This vulnerability was reported to Microsoft by Peter Grundl.

This document was written by Jeffrey P. Lanza and is based on information provided by Microsoft.

Other Information

CVE IDs: CVE-2001-0505
Severity Metric: 4.25
Date Public: 2001-07-24
Date First Published: 2001-07-24
Date Last Updated: 2001-08-07 19:44 UTC
Document Revision: 11

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