Notice: This website is an unofficial Microsoft Knowledge Base (hereinafter KB) archive and is intended to provide a reliable access to deleted content from Microsoft KB. All KB articles are owned by Microsoft Corporation. Read full disclaimer for more details.

MS02-010: Unchecked Buffer in ISAPI Filter May Allow Commerce Server Compromise


View products that this article applies to.

This article was previously published under Q317615

↑ Back to the top


Symptoms

A Commerce Server Web site may fail with an access violation. Drwtsn32 reports and logs the process failure.

↑ Back to the top


Cause

By default, Commerce Server 2000 installs a dynamic-link library (DLL) with an ISAPI filter that allows the server to provide extended functionality in response to events on the server. This filter, called AuthFilter, provides support for a variety of authentication methods. Commerce Server 2000 can also be configured to use other authentication methods.

A security vulnerability results because AuthFilter contains an unchecked buffer in a section of code that handles certain types of authentication requests. An attacker who provides authentication data that overruns the buffer may cause the Commerce Server process to fail, or may run code in the security context of the Commerce Server process. The process runs with LocalSystem privileges, so exploiting the vulnerability may give the attacker complete control of the server.

↑ Back to the top


Resolution

This update is available as a separate download or as part of Commerce Server 2000 Service Pack 3 (SP3). For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
297216� INF: How to Obtain the Latest Commerce Server 2000 Service Pack

Individual Update

The following files are available for download from the Microsoft Download Center:
Release Date: Feb-21-2002

For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591� How to Obtain Microsoft Support Files from Online Services
Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help to prevent any unauthorized changes to the file.

The English version of this update has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
   Date         Time   Version     Size     File name     Platform
   ---------------------------------------------------------------
   29-Jan-2002  16:30  4.0.3032.0  102,672  Siteauth.dll  i386
				
Note Because of file dependencies, this update may contain additional files.

Important To install this update, you must have Microsoft Commerce Server 2000 Service Pack 2 (SP2) installed. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:
297216� INF: How to Obtain the Latest Commerce Server 2000 Service Pack

↑ Back to the top


Status

Microsoft has confirmed that this problem may cause a degree of security vulnerability in Commerce Server 2000. This problem was first corrected in Commerce Server 2000 Service Pack 3 (SP3).

↑ Back to the top


More information

For more information on this vulnerability, see the following Microsoft Web site:

↑ Back to the top


Keywords: kbsecurity, kbsecbulletin, kbfix, kbcommserv2000sp3fix, kbcommserv2000presp3fix, kbproductlink, kbhotfixserver, kbqfe, kbbug, kbsecvulnerability, KB317615

↑ Back to the top

Article Info
Article ID : 317615
Revision : 7
Created on : 10/29/2007
Published on : 10/29/2007
Exists online : False
Views : 413