Vulnerability Note VU#484891

Microsoft SQL Server 2000 contains stack buffer overflow in SQL Server Resolution Service

Overview

Microsoft SQL Server 2000 contains a remotely exploitable stack buffer overflow that allows attackers to execute arbitrary code with the same privileges as the SQL server.

I. Description

The SQL Server Resolution Service (SSRS) was introduced in Microsoft SQL Server 2000 to provide referral services for multiple server instances running on the same machine. The service listens for requests on UDP port 1434 and returns the IP address and port number of the SQL server instance that provides access to the requested database.

The SSRS contains a stack buffer overflow that allows an attacker to execute arbitrary code by sending a crafted request to port 1434/udp. The code within such a request will be executed by the server host with the privileges of the SQL Server service account.

II. Impact

This vulnerability allows unauthenticated remote attackers to execute arbitrary code with the privileges of the SQL service account. If the privileges of the service account are elevated via VU#796313, this vulnerability may result in compromise of the server host.

III. Solution

Apply a patch

This vulnerability was originally addressed by Microsoft in Security Bulletin MS02-039. In January 2003, Microsoft updated MS02-039 to recommend that customers apply the patch from Microsoft Security Bulletin MS02-061, which addresses additional vulnerabilities. For more information, please see

http://www.microsoft.com/technet/security/bulletin/MS02-039.asp

http://www.microsoft.com/technet/security/bulletin/MS02-061.asp

This vulnerability also affects any products that include the Microsoft Desktop Engine (MSDE) 2000. For more information, please see

http://www.microsoft.com/technet/security/MSDEapps.asp

Block port 1434/udp

As a workaround, system administrators can use a firewall to block port 1434/udp at an appropriate network border, thus preventing external attackers from exploiting this vulnerability.

Systems Affected

Vendor	Status	Date Notified
Affymetrix	Unknown	18-Mar-2003
Baltimore Technologies plc	Unknown	17-Mar-2003
BindView Corporation	Vulnerable	20-Feb-2003
Blackboard Inc.	Unknown	11-Mar-2003
Cisco Systems, Inc.	Vulnerable	27-Jan-2003
Computer Associates	Unknown	20-Feb-2003
Dell Computer Corporation	Unknown	20-Feb-2003
Elron Software	Unknown	5-Mar-2003
Express Metrix LLC	Vulnerable	6-Mar-2003
Fluke Corporation	Unknown	20-Feb-2003
GFI Software	Unknown	20-Feb-2003
Hewlett-Packard Company	Vulnerable	20-Feb-2003
Intel	Unknown	20-Feb-2003
Internet Security Systems Inc.	Unknown	20-Feb-2003
Journyx	Unknown	5-Mar-2003
Kaseya	Vulnerable	26-Mar-2003
Komercni Banka	Unknown	5-Mar-2003
Lightspeed Systems	Vulnerable	5-Mar-2003
Meridian Project Systems	Unknown	5-Mar-2003
Microsoft Corporation	Vulnerable	25-Jul-2002
Netwiz Pty Ltd	Not Vulnerable	13-Mar-2003
Nexus	Unknown	5-Mar-2003
NIST Computer Security Resource Center	Unknown	17-Mar-2003
Nortel Networks, Inc.	Not Vulnerable	6-Feb-2003
Okena	Unknown	17-Mar-2003
Omtool	Unknown	5-Mar-2003
Pharos Systems	Unknown	11-Mar-2003
Power Measurement	Unknown	6-Mar-2003
Research In Motion Limited	Unknown	5-Mar-2003
Small Wonders Software	Vulnerable	4-Mar-2003
SurfControl plc	Unknown	7-Mar-2003
Tivoli Systems	Unknown	20-Feb-2003
Trend Micro	Unknown	20-Feb-2003
Veritas SOFTWARE	Vulnerable	20-May-2003
Vigilante	Vulnerable	20-May-2003
Xerox Corporation	Vulnerable	20-Feb-2003

References

CA-2003-04
http://www.microsoft.com/technet/security/bulletin/MS02-039.asp
http://www.microsoft.com/technet/security/MSDEapps.asp
http://www.microsoft.com/technet/security/virus/alerts/slammer.asp
http://support.microsoft.com/support/misc/kblookup.asp?id=Q323875
http://www.microsoft.com/technet/prodtechnol/sql/maintain/security/sql2ksec.asp
http://www.nextgenss.com/advisories/mssql-udp.txt
http://www.nextgenss.com/vna/ms-sql.txt
http://online.securityfocus.com/bid/5311
http://www.cert.org/advisories/CA-2003-04.html

Credit

The CERT/CC thanks Microsoft for the information provided in their advisory and NGSSoftware for their discovery and analysis of this vulnerability.

This document was written by Jeffrey P. Lanza.

Other Information

Date Public:	2002-07-24
Date First Published:	2002-07-26
Date Last Updated:	2006-05-08
CERT Advisory:	CA-2002-22
CVE-ID(s):	CVE-2002-0649
NVD-ID(s):	CVE-2002-0649
US-CERT Technical Alerts:
Metric:	43.28
Document Revision:	65

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