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Microsoft Security Bulletin Summary for April 2005

Issued: April 12, 2005
Updated: August 9, 2005
Version Number: 1.2

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Summary

Included in this advisory are updates for newly discovered vulnerabilities. These vulnerabilities, broken down by severity are:

Critical (5)

Bulletin Identifier	Microsoft Security Bulletin MS05-019
Bulletin Title	Vulnerabilities in TCP/IP Could Allow Remote Code Execution and Denial of Service
Executive Summary	Vulnerabilities exist in Windows that could allow an attacker to take complete control of an affected system.
Maximum Severity Rating	Critical
Impact of Vulnerability	Remote Code Execution
Affected Software	Windows: For more information, see the Affected Software and Download Locations section.

Bulletin Identifier	Microsoft Security Bulletin MS05-020
Bulletin Title	Cumulative Security Update for Internet Explorer
Executive Summary	Vulnerabilities exist in Internet Explorer that could allow an attacker to take complete control of an affected system.
Maximum Severity Rating	Critical
Impact of Vulnerability	Remote Code Execution
Affected Software	Internet Explorer: For more information, see the Affected Software and Download Locations section.

Bulletin Identifier	Microsoft Security Bulletin MS05-021
Bulletin Title	Vulnerability in Exchange Server Could Allow Remote Code Execution
Executive Summary	A vulnerability exists in Microsoft Exchange Server that could allow an attacker to run arbitrary code.
Maximum Severity Rating	Critical
Impact of Vulnerability	Remote Code Execution
Affected Software	Exchange Server: For more information, see the Affected Software and Download Locations section.

Bulletin Identifier	Microsoft Security Bulletin MS05-022
Bulletin Title	Vulnerability in MSN Messenger Could Lead to Remote Code Execution
Executive Summary	A vulnerability exists in MSN Messenger that could allow an attacker to run arbitrary code.
Maximum Severity Rating	Critical
Impact of Vulnerability	Remote Code Execution
Affected Software	MSN Messenger: For more information, see the Affected Software and Download Locations section.

Bulletin Identifier	Microsoft Security Bulletin MS05-023
Bulletin Title	Vulnerabilities in Microsoft Word May Lead to Remote Code Execution
Executive Summary	Vulnerabilities exist in Microsoft Word that could allow an attacker to take complete control of an affected system.
Maximum Severity Rating	Critical
Impact of Vulnerability	Remote Code Execution
Affected Software	Office: For more information, see the Affected Software and Download Locations section.

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Important (3)

Bulletin Identifier	Microsoft Security Bulletin MS05-016
Bulletin Title	Vulnerability in Windows Shell that Could Allow Remote Code Execution
Executive Summary	A vulnerability exists in Windows that could allow an attacker to take complete control of an affected system. User interaction is required for an attacker to exploit this vulnerability.
Maximum Severity Rating	Important
Impact of Vulnerability	Remote Code Execution
Affected Software	Windows: For more information, see the Affected Software and Download Locations section.

Bulletin Identifier	Microsoft Security Bulletin MS05-017
Bulletin Title	Vulnerability in Message Queuing Could Allow Code Execution
Executive Summary	A vulnerability exists in MSMQ that could allow an attacker to take complete control of an affected system. Message Queuing is not installed by default on the operating systems software affected by this security bulletin.
Maximum Severity Rating	Important
Impact of Vulnerability	Remote Code Execution
Affected Software	Windows: For more information, see the Affected Software and Download Locations section.

Bulletin Identifier	Microsoft Security Bulletin MS05-018
Bulletin Title	Vulnerabilities in Windows Kernel Could Allow Elevation of Privilege and Denial of Service
Executive Summary	Vulnerabilities exist in Windows that could allow an attacker to take complete control of an affected system. To exploit this vulnerability an attacker must have valid credentials and must be able to logon locally to the affected system.
Maximum Severity Rating	Important
Impact of Vulnerability	Elevation Of Privilege
Affected Software	Windows: For more information, see the Affected Software and Download Locations section.

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Affected Software and Download Locations

How do I use this table?

You use this table to learn about the security updates that you may need to install. You should review each software program or component listed to see if there are required security updates. If a software program or component is listed then the impact of the vulnerability is listed and also hyperlinked to the available software update.

In the table, a number in brackets [x] indicates that there is a note that explains more about the issue. These notes are located at the bottom of the table.

Note You may have to install several security updates for a single vulnerability. Review the whole column for each bulletin identifier that is listed to verify the updates that you have to install, based on the programs or components that you have installed on your system.

Affected Software and Download Locations

	Details	Details	Details	Details	Details	Details	Details	Details
Bulletin Identifier	MS05-016	MS05-017	MS05-018	MS05-019	MS05-020	MS05-021	MS05-022	MS05-023
Maximum Severity Rating	Important	Important	Important	Critical	Critical	Critical	Critical	Critical
Windows Affected Software:
Windows Server™ 2003	Important		Important	Moderate	[1]		[4]
Microsoft Windows Server 2003 for Itanium-based Systems	Important		Important	Moderate	[1]
Windows XP Service Pack 1	Important	Important	Important	Critical	[1]		[4]
Windows XP Service Pack 2	Important		Important	Moderate	[1]		[4]
Microsoft Windows XP 64-Bit Edition Service Pack 1 (Itanium)	Important	Important	Important	Critical	[1]
Microsoft Windows XP 64-Bit Edition Version 2003 (Itanium)	Important		Important	Critical	[1]
Windows 2000 Service Pack 3	Important	Important	Important	Critical	[1]		[4]
Windows 2000 Service Pack 4	Important	Important	Important	Critical	[1]		[4]
Windows Millennium Edition (ME)	[2]		[2]	[2]	[1]
Windows 98 Second Edition (SE)	[2]	[2]	[2]	[2]	[1]
Windows 98	[2]	[2]	[2]	[2]	[1]

Windows Affected Operating System Components:
Internet Explorer 5.01 Service Pack 3 on Microsoft Windows 2000 Service Pack 3					Critical
Internet Explorer 5.01 Service Pack 4 on Microsoft Windows 2000 Service Pack 4					Critical
Internet Explorer 5.5 Service Pack 2 on Microsoft Windows Millennium Edition					[3]
Internet Explorer 6 Service Pack 1 on Microsoft Windows 2000 Service Pack 3, on Microsoft Windows 2000 Service Pack 4, or on Microsoft Windows XP Service Pack 1					Critical
Internet Explorer 6 Service Pack 1 on Microsoft Windows 98, on Microsoft Windows 98 SE, or on Microsoft Windows Millennium Edition					[3]
Internet Explorer 6 Service Pack 1 for Microsoft Windows XP 64-Bit Edition Service Pack 1 (Itanium)					Critical
Internet Explorer 6 for Windows XP Service Pack 2					Critical
Internet Explorer 6 for Windows Server 2003					Critical
Internet Explorer 6 for Microsoft Windows Server 2003 for Itanium-based Systems and Microsoft Windows XP 64-Bit Edition Version 2003 (Itanium)					Critical

Office Affected Software:
Word 2000								Critical
Word 2002								Critical
Word 2003								Important
Works Suite 2001								Critical
Works Suite 2002								Critical
Works Suite 2003								Critical
Works Suite 2004								Critical
Word Viewer 2003								Important

Exchange Affected Software:
Exchange Server 2003						Moderate
Exchange Server 2003 Service Pack 1						Moderate
Exchange 2000 Server Service Pack 3						Critical

Other Affected Microsoft Software:
MSN Messenger 6.2							Critical

Notes:

[1] There is a security update available for this operating system. See the affected component, Microsoft Internet Explorer, in the table and the appropriate security bulletin for more details.

[2] This operating system is vulnerable to this issue. However, it is not critically affected. Security updates for non-critical issues are typically not offered on this operating system. For more information about the Microsoft Support Lifecycle policies for this operating system, visit the following Web site. See the appropriate security bulletin for more details.

[3] Critical security updates for these platforms are available and are provided as part of this security bulletin and can be downloaded from the Windows Update Web site.

[4] MSN Messenger 6.2 is affected when running on this operating system. Please see MSN Messenger under the Other Affected Microsoft Software.

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Deployment

Software Update Services:

By using Microsoft Software Update Services (SUS), administrators can quickly and reliably deploy the latest critical updates and security updates to Windows 2000 and Windows Server 2003 based servers, and to desktop systems that are running Windows 2000 Professional or Windows XP Professional.

For more information about how to deploy this security update with Software Update Services, visit the Software Update Services Web site.

Systems Management Server:

Microsoft Systems Management Server (SMS) delivers a highly-configurable enterprise solution for managing updates. By using SMS, administrators can identify Windows-based systems that require security updates and to perform controlled deployment of these updates throughout the enterprise with minimal disruption to end users. For more information about how administrators can use SMS 2003 to deploy security updates, see the SMS 2003 Security Patch Management Web site. SMS 2.0 users can also use Software Updates Service Feature Pack to help deploy security updates. For information about SMS, visit the SMS Web site.

Note SMS uses the Microsoft Baseline Security Analyzer and the Microsoft Office Detection Tool to provide broad support for security bulletin update detection and deployment. Some software updates may not be detected by these tools. Administrators can use the inventory capabilities of the SMS in these cases to target updates to specific systems. For more information about this procedure, see the following Web site. Some security updates require administrative rights following a restart of the system. Administrators can use the Elevated Rights Deployment Tool (available in the SMS 2003 Administration Feature Pack and in the SMS 2.0 Administration Feature Pack) to install these updates.

QChain.exe and Update.exe:

Microsoft has released a command-line tool named QChain.exe that gives system administrators the ability to safely chain security updates together. Chaining is when you install multiple updates without restarting between each install. Update.exe, used in the updates that are described in this advisory, has chaining functionality built in. Customers who use Windows 2000 Service Pack 2 or later, who use Windows XP, or who use Windows Server 2003, do not require Qchain.exe to chain these updates. Qchain.exe still supports chaining these Windows Updates so that an administrator can create a consistent deployment script across all platforms. For more information about Qchain, visit this Web site.

Microsoft Baseline Security Analyzer:

The Microsoft Baseline Security Analyzer (MBSA) allows administrators to scan local and remote systems for missing security updates as well as common security misconfigurations. For more information about MBSA visit Microsoft Baseline Security Analyzer Web site.

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Other information:

Acknowledgments

Microsoft thanks the following for working with us to help protect customers:

•	iDEFENSE for reporting the issue described in MS05-016.
•	Kostya Kortchinsky with CERT RENATER for reporting the issue described in MS05-017.
•	John Heasman with Next Generation Security Software Ltd. for reporting an issue described in MS05-018.
•	Sanjeev Radhakrishnan, Amit Joshi, and Ananta Iyengar with GreenBorder Technologies for reporting an issue described in MS05-018.
•	David Fritz working with iDEFENSE for reporting an issue described in MS05-018.
•	Song Liu, Hongzhen Zhou, and Neel Mehta of ISS X-Force for reporting an issue described in MS05-019.
•	Fernando Gont of Argentina's Universidad Tecnologica Nacional/Facultad Regional Haedo, for reporting issues described in MS05-019.
•	Qualys for reporting an issue described in MS05-019.
•	Berend-Jan Wever working with iDEFENSE for reporting an issue described in MS05-020.
•	3APA3A and axle@bytefall working with iDEFENSE for reporting an issue described in MS05-020.
•	Andres Tarasco of SIA Group for reporting an issue described in MS05-020.
•	Mark Dowd and Ben Layer of ISS X-Force for reporting the issue described in MS05-021.
•	Hongzhen Zhou for reporting the issue described in MS05-022.
•	Alex Li for reporting the issue described in MS05-023.

Obtaining Other Security Updates:

Updates for other security issues are available from the following locations:

•	Security updates are available from the Microsoft Download Center. You can find them most easily by doing a keyword search for "security_patch".
•	Updates for consumer platforms are available from the Windows Update Web site.

Support:

•	Customers in the U.S. and Canada can receive technical support from Microsoft Product Support Services at 1-866-PCSAFETY. There is no charge for support calls that are associated with security updates.
•	International customers can receive support from their local Microsoft subsidiaries. There is no charge for support that is associated with security updates. For more information about how to contact Microsoft for support issues, visit the International Support Web site.

Security Resources:

•	The Microsoft TechNet Security Web site provides additional information about security in Microsoft products.
•	Microsoft Software Update Services
•	Microsoft Baseline Security Analyzer (MBSA)
•	Windows Update
•	Windows Update Catalog: For more information about the Windows Update Catalog, see Microsoft Knowledge Base Article 323166.
•	Office Update

Disclaimer:

The information provided in the Microsoft Knowledge Base is provided "as is" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.

Revisions:

•	V1.0 (April 12, 2005): Bulletin published.
•	V1.1 (April 15, 2005): Bulletin revised to update acknowledgements section.
•	V1.2 (August 9, 2005): Bulletin updated to reflect an additional affected product- Microsoft Word 2003 Viewer.

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