__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN Vulnerability in Microsoft XML Core Services [Microsoft Security Bulletin (MS07-042)] August 14, 2007 18:00 GMT Number R-316 [REVISED 16 Aug 2007] [REVISED 28 Sept 2007] [REVISED 10 Jan 2008] [REVISED 27 Jun 2008] ______________________________________________________________________________ PROBLEM: A remote code execution vulnerability exists in Microsoft XML Core Services that could allow an attacker who successfully exploited this vulnerability to make changes to the system with the permissions of the logged-onuser. PLATFORM: Windows 2000 Service Pack 4 Microsoft XML Core Services 3.0, 4.0, 6.0 Windows XP Service Pack 2 Professional x64 Edition Servcie pack 2 Windows Server 2003 Service Pack 1, 2 x64 Edition x64 Edition Service Pack 2 w/SP1, 2 for Itanium-based Systems Windows Vista x64 Edition Office Software Microsoft Office 2003 Service Pack 2 2007 Microsoft Office System Microsoft Office SharePoint Server Microsoft Office Groove Server 2007 DAMAGE: Could allow remote code execution. SOLUTION: Upgrade to the appropriate version. ______________________________________________________________________________ VULNERABILITY The risk is MEDIUM. If the user is logged on with administrative ASSESSMENT: user rights, an attacker could take complete control of the affected system. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/r-316.shtml ORIGINAL BULLETIN: http://www.microsoft.com/technet/security/Bulletin/MS07-042.mspx CVE: http://www.cve.mitre.org/cgi-bin/cvename.cgi?name= CVE-2007-2223 ______________________________________________________________________________ REVISION HISTORY: 08/16/2007 - revised R-316 to reflect changes Microsoft has made in MS07-042 where they corredted file manifest information for Microsoft XML Core Services 4.0. 09/28/2007 - revised R-316 to reflect changes Microsoft has made in MS07-042 where they added Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats and Microsoft Expression Web as affected products. The bulletin has also been updated to inform customers that a potential reliability issue exists in applications that have installed Microsoft XML Core Services 4.0 on Windows Vista. 01/10/2008 - revised R-316 to reflect changes Microsoft has made in MS07-042 where they added Microsoft Word Viewer 2003 as an affected product. Also an Update FAQ clarifying the kill bit for Microsoft XML Parser 2.6 and its applicability to this security update. 06/27/2008 - revised R-316 to reflect changes Microsoft has made in MS07-042 where they added added Windows XP Service Pack 3, Windows Vista Service Pack 1, Windows Vista x64 Edition Service Pack 1, Windows Server 2008 for 32-bit Systems, Windows Server 2008 for x64-based Systems, and Windows Server 2008 for Itanium-based Systems as affected software. This is a detection update only. There are no changes to the binaries. [***** Start Microsoft Security Bulletin (MS07-042) *****] Microsoft Security Bulletin MS07-042 - Critical Vulnerability in Microsoft XML Core Services Could Allow Remote Code Execution \ (936227) Published: August 14, 2007 | Updated: June 24, 2008 Version: 4.0 General Information Executive Summary This critical security update resolves a privately reported vulnerability. This vulnerability could allow remote code execution if a user viewed a specially crafted Web page using Internet Explorer. The vulnerability could be exploited through attacks on Microsoft XML Core Services. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. This is a critical security update for all supported editions of Windows 2000, Windows XP, Windows Vista, Microsoft Office 2003, and 2007 Microsoft Office System. For more information, see the subsection, Affected and Non-Affected Software, in this section. This security update addresses the vulnerability by modifying the way that the Microsoft XML Core Services performs parameter validation. For more information about the vulnerabilities, see the Frequently Asked Questions (FAQ) subsection for the specific vulnerability entry under the next section, Vulnerability Information. Recommendation. Microsoft recommends that customers apply the update immediately. Known Issues. None Top of section Affected and Non-Affected Software The software listed here has been tested to determine which versions or editions are affected. Other versions or editions are either past their support life cycle or are not affected. To determine the support life cycle for your software version or edition, visit Microsoft Support Lifecycle. Affected Software Windows 2000 Windows 2000 Service Pack 4 Microsoft XML Core Services 3.0 (KB936021) Remote Code Execution Critical MS06-061 Windows 2000 Service Pack 4 Microsoft XML Core Services 4.0 (KB936181) Remote Code Execution Critical MS06-071 Windows 2000 Service Pack 4 Microsoft XML Core Services 6.0 (KB933579) Remote Code Execution Critical MS06-071 Windows XP Windows XP Service Pack 2 Microsoft XML Core Services 3.0 (KB936021) Remote Code Execution Critical MS06-061 Windows XP Professional x64 Edition and Windows XP Professional x64 Edition Service Pack 2 Microsoft XML Core Services 3.0 (KB936021) Remote Code Execution Critical MS06-061 Windows XP Service Pack 2 Microsoft XML Core Services 4.0 (KB936181) Remote Code Execution Critical MS06-071 Windows XP Service Pack 3 Microsoft XML Core Services 4.0 (KB936181) Remote Code Execution Critical None Windows XP Professional x64 Edition and Windows XP Professional x64 Edition Service Pack 2 Microsoft XML Core Services 4.0 (KB936181) Remote Code Execution Critical MS06-071 Windows XP Service Pack 2 Microsoft XML Core Services 6.0 (KB933579) Remote Code Execution Critical MS06-071 Windows XP Professional x64 Edition and Windows XP Professional x64 Edition Service Pack 2 Microsoft XML Core Services 6.0 (KB933579) Remote Code Execution Critical MS06-071 Windows Server 2003 Windows Server 2003 Service Pack 1 Microsoft XML Core Services 3.0 (KB936021) Remote Code Execution Moderate MS06-061 Windows Server 2003 Service Pack 2 Microsoft XML Core Services 3.0 (KB936021) Remote Code Execution Moderate None Windows Server 2003 x64 Edition Microsoft XML Core Services 3.0 (KB936021) Remote Code Execution Moderate MS06-061 Windows Server 2003 x64 Edition Service Pack 2 Microsoft XML Core Services 3.0 (KB936021) Remote Code Execution Moderate None Windows Server 2003 with SP1 for Itanium-based Systems Microsoft XML Core Services 3.0 (KB936021) Remote Code Execution Moderate MS06-061 Windows Server 2003 with SP2 for Itanium-based Systems Microsoft XML Core Services 3.0 (KB936021) Remote Code Execution Moderate None Windows Server 2003 Service Pack 1 and Windows Server 2003 Service Pack 2 Microsoft XML Core Services 4.0 (KB936181) Remote Code Execution Moderate MS06-071 Windows Server 2003 x64 Edition and Windows Server 2003 x64 Edition Service Pack 2 Microsoft XML Core Services 4.0 (KB936181) Remote Code Execution Moderate MS06-071 Windows Server 2003 with SP1 for Itanium-based Systems and Windows Server 2003 with SP2 for Itanium-based Systems Microsoft XML Core Services 4.0 (KB936181) Remote Code Execution Moderate MS06-071 Windows Server 2003 Service Pack 1 and Windows Server 2003 Service Pack 2 Microsoft XML Core Services 6.0 (KB933579) Remote Code Execution Moderate MS06-071 Windows Server 2003 x64 Edition and Windows Server 2003 x64 Edition Service Pack 2 Microsoft XML Core Services 6.0 (KB933579) Remote Code Execution Moderate MS06-071 Windows Server 2003 with SP1 for Itanium-based Systems and Windows Server 2003 with SP2 for Itanium-based Systems Microsoft XML Core Services 6.0 (KB933579) Remote Code Execution Moderate MS06-071 Windows Vista Windows Vista Microsoft XML Core Services 3.0 (KB936021) Remote Code Execution Critical MS06-061 Windows Vista x64 Edition Microsoft XML Core Services 3.0 (KB936021) Remote Code Execution Critical MS06-061 Windows Vista and Windows Vista Service Pack 1 Microsoft XML Core Services 4.0 (KB936181) Remote Code Execution Critical MS06-071 Windows Vista x64 Edition and Windows Vista x64 Edition Service Pack 1 Microsoft XML Core Services 4.0 (KB936181) Remote Code Execution Critical MS06-071 Windows Vista Microsoft XML Core Services 6.0 (KB933579) Remote Code Execution Critical MS06-071 Windows Vista x64 Edition Microsoft XML Core Services 6.0 (KB933579) Remote Code Execution Critical MS06-071 Windows Server 2008 Windows Server 2008 for 32-bit Systems Microsoft XML Core Services 4.0 (KB936181) Remote Code Execution Moderate None Windows Server 2008 for x64-based Systems Microsoft XML Core Services 4.0 (KB936181) Remote Code Execution Moderate None Windows Server 2008 for Itanium-based Systems Microsoft XML Core Services 4.0 (KB936181) Remote Code Execution Moderate None Office Software Microsoft Office 2003 Service Pack 2 Microsoft XML Core Services 5.0 (KB936048) Remote Code Execution Critical MS06-061 Microsoft Word Viewer 2003 Microsoft XML Core Services 5.0 (KB936048) Remote Code Execution Critical None 2007 Microsoft Office System Microsoft XML Core Services 5.0 (KB936960) Remote Code Execution Critical None Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats Microsoft XML Core Services 5.0 (KB936960) Remote Code Execution Critical None Microsoft Expression Web Microsoft XML Core Services 5.0 (KB936960) Remote Code Execution Critical None Microsoft Office SharePoint Server Microsoft XML Core Services 5.0 (KB936056) Remote Code Execution Critical None Microsoft Office Groove Server 2007 Microsoft XML Core Services 5.0 (KB936056) Remote Code Execution Critical None Top of section Vulnerability Information Severity Ratings and Vulnerability Identifiers Vulnerability Severity Rating and Maximum Security Impact by Affected Software Affected Software Microsoft XML Core Services Vulnerability – CVE-2007-2223 Aggregate Severity Rating Windows 2000 Microsoft XML Core Services 3.0 on Windows 2000 Service Pack 4 Critical Remote Code Execution Critical Microsoft XML Core Services 4.0 when installed on Windows 2000 Service Pack 4 Critical Remote Code Execution Critical Microsoft XML Core Services 6.0 when installed on Windows 2000 Service Pack 4 Critical Remote Code Execution Critical Windows XP Microsoft XML Core Services 3.0 on Windows XP Service Pack 2 Critical Remote Code Execution Critical Microsoft XML Core Services 3.0 on Windows XP Professional x64 Edition and Windows XP Professional x64 Edition Service Pack 2 Critical Remote Code Execution Critical Microsoft XML Core Services 4.0 when installed on Windows XP Service Pack 2 Critical Remote Code Execution Critical Microsoft XML Core Services 4.0 when installed on Windows XP Professional x64 Edition and Windows XP Professional x64 Edition Service Pack 2 Critical Remote Code Execution Critical Microsoft XML Core Services 6.0 when installed on Windows XP Service Pack 2 Critical Remote Code Execution Critical Microsoft XML Core Services 6.0 when installed on Windows XP Professional x64 Edition and Windows XP Professional x64 Edition Service Pack 2 Critical Remote Code Execution Critical Windows Server 2003 Microsoft XML Core Services 3.0 on Windows Server 2003 Service Pack 1 and Windows Server 2003 Service Pack 2 Moderate Remote Code Execution Moderate Microsoft XML Core Services 3.0 on Windows Server 2003 x64 Edition and Windows Server 2003 x64 Edition Service Pack 2 Moderate Remote Code Execution Moderate Microsoft XML Core Services 3.0 on Windows Server 2003 with SP1 for Itanium-based Systems and Windows Server 2003 with SP2 for Itanium-based Systems Moderate Remote Code Execution Moderate Microsoft XML Core Services 4.0 when installed on Windows Server 2003 Service Pack 1 and Windows Server 2003 Service Pack 2 Moderate Remote Code Execution Moderate Microsoft XML Core Services 4.0 when installed on Windows Server 2003 x64 Edition and Windows Server 2003 x64 Edition Service Pack 2 Moderate Remote Code Execution Moderate Microsoft XML Core Services 4.0 when installed on Windows Server 2003 with SP1 for Itanium-based Systems and Windows Server 2003 with SP2 for Itanium-based Systems Moderate Remote Code Execution Moderate Microsoft XML Core Services 6.0 when installed on Windows Server 2003 Service Pack 1 and Windows Server 2003 Service Pack 2 Moderate Remote Code Execution Moderate Microsoft XML Core Services 6.0 when installed on Windows Server 2003 x64 Edition and Windows Server 2003 x64 Edition Service Pack 2 Moderate Remote Code Execution Moderate Microsoft XML Core Services 6.0 when installed on Windows Server 2003 with SP1 for Itanium-based Systems and Windows Server 2003 with SP2 for Itanium-based Systems Moderate Remote Code Execution Moderate Windows Vista Microsoft XML Core Services 3.0 on Windows Vista Critical Remote Code Execution Critical Microsoft XML Core Services 3.0 on Windows Vista x64 Edition Critical Remote Code Execution Critical Microsoft XML Core Services 4.0 when installed on Windows Vista Critical Remote Code Execution Critical Microsoft XML Core Services 4.0 when installed on Windows Vista x64 Edition Critical Remote Code Execution Critical Microsoft XML Core Services 6.0 on Windows Vista Critical Remote Code Execution Critical Microsoft XML Core Services 6.0 on Windows Vista x64 Edition Critical Remote Code Execution Critical Office Suite Office 2003 Service Pack 2 with Microsoft XML Core Services 5.0 Critical Remote Code Execution Critical 2007 Office System with Microsoft XML Core Services 5.0 Critical Remote Code Execution Critical 2007 Office System with Microsoft XML Core Services 6.0 Critical Remote Code Execution Critical Office SharePoint Server with Microsoft XML Core Services 5.0 Critical Remote Code Execution Critical Office Groove Server 2007 with Microsoft XML Core Services 5.0 Critical Remote Code Execution Critical Top of section Microsoft XML Core Services Vulnerability - CVE-2007-2223 A remote code execution vulnerability exists in Microsoft XML Core Services that could allow an attacker who successfully exploited this vulnerability to make changes to the system with the permissions of the logged-on user. If a user is logged on with administrative user rights, an attacker could take complete control of the affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. To view this vulnerability as a standard entry in the Common Vulnerabilities and Exposures list, see CVE-2007-2223. Update Information Detection and Deployment Tools and Guidance Manage the software and security updates you need to deploy to the servers, desktop, and mobile systems in your organization. For more information see the TechNet Update Management Center. The Microsoft TechNet Security Web site provides additional information about security in Microsoft products. Security updates are available from Microsoft Update, Windows Update, and Office Update. Security updates are also available at the Microsoft Download Center. You can find them most easily by doing a keyword search for "security_patch." Finally, security updates can be downloaded from the Windows Update Catalog. For more information about the Windows Update Catalog, see Microsoft Knowledge Base Article 323166. Detection and Deployment Guidance Microsoft has provided detection and deployment guidance for this month’s security updates. This guidance will also help IT professionals understand how they can use various tools to help deploy the security update, such as Windows Update, Microsoft Update, Office Update, the Microsoft Baseline Security Analyzer (MBSA), the Office Detection Tool, Microsoft Systems Management Server (SMS), the Extended Security Update Inventory Tool, and the Enterprise Update Scan Tool (EST). For more information, see Microsoft Knowledge Base Article 910723. Microsoft Baseline Security Analyzer 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. The following table provides the MBSA detection summary for this security update. Software MBSA 1.2.1 MBSA 2.0.1 Windows 2000 Service Pack 4 Yes Yes Windows XP Service Pack 2 Yes Yes Windows XP Professional x64 Edition and Windows XP Professional x64 Edition Service Pack 2 No Yes Windows Server 2003 Service Pack 1 and Windows Server 2003 Service Pack 2 Yes Yes Windows Server 2003 x64 Edition and Windows Server 2003 x64 Edition Service Pack 2 No Yes Windows Server 2003 with SP1 for Itanium-based Systems and Windows Server 2003 with SP2 for Itanium-based Systems No Yes Windows Vista No See Note for Windows Vista below Windows Vista x64 Edition No See Note for Windows Vista below Office 2003 Service Pack 2 Yes[1] Yes 2007 Office system Yes[1] Yes Office SharePoint Server 2007 Yes[1] Yes Office Groove Server 2007 Yes[1] Yes Microsoft XML Core Services 4.0 Yes Yes Microsoft XML Core Services 6.0 Yes Yes [1]MBSA 1.2.1 supports detection of this security update only as a local scan. MBSA 1.2.1 uses an integrated version of the Office Detection Tool (ODT) which does not support remote scans of this security update. For more information about MBSA, visit the MBSA Web site. Note for Windows Vista Microsoft does not support installing MBSA 2.0.1 on systems that run Windows Vista, but you may install MBSA 2.0.1 on a supported operating system and then scan the Windows Vista-based system remotely. For additional information about MBSA support for Windows Vista, visit the MBSA Web site. See also Microsoft Knowledge Base Article 931943: Microsoft Baseline Security Analyzer (MBSA) support for Windows Vista. For more information about MBSA, visit the MBSA Web site. For more information about the software that Microsoft Update and MBSA 2.0 currently do not detect, see Microsoft Knowledge Base Article 895660. Windows Server Update Services By using Windows Server Update Services (WSUS), administrators can deploy the latest critical updates and security updates for Windows 2000 operating systems and later, Office XP and later, Exchange Server 2003, and SQL Server 2000 to Windows 2000 and later operating systems. For more information about how to deploy this security update using Windows Server Update Services, visit the Windows Server Update Services Web site. Systems Management Server The following table provides the SMS detection and deployment summary for this security update. Software SMS 2.0 SMS 2003 Microsoft Windows 2000 Service Pack 4 Yes Yes Microsoft Windows XP Service Pack 2 Yes Yes Windows XP Professional x64 Edition and Windows XP Professional x64 Edition Service Pack 2 No Yes Windows Server 2003 Service Pack 1 and Windows Server 2003 Service Pack 2 Yes Yes Windows Server 2003 x64 Edition and Windows Server 2003 x64 Edition Service Pack 2 No Yes Windows Server 2003 with SP1 for Itanium-based Systems and Windows Server 2003 with SP2 for Itanium-based Systems No Yes Windows Vista No See Note for Windows Vista below Windows Vista x64 Edition No See Note for Windows Vista below Office 2003 Service Pack 2 Yes Yes 2007 Office System Yes Yes Office SharePoint Server Yes Yes Office Groove Server 2007 Yes Yes Microsoft XML Core Services 4.0 Yes Yes Microsoft XML Core Services 6.0 Yes Yes For SMS 2.0, the SMS SUS Feature Pack, which includes the Security Update Inventory Tool (SUIT), can be used by SMS to detect security updates. SMS SUIT uses the MBSA 1.2.1 engine for detection. For more information about SUIT, visit the following Microsoft Web site. For more information about the limitations of SUIT, see Microsoft Knowledge Base Article 306460. The SMS SUS Feature Pack also includes the Microsoft Office Inventory Tool to detect required updates for Microsoft Office applications. For SMS 2003, the SMS 2003 Inventory Tool for Microsoft Updates (ITMU) can be used by SMS to detect security updates that are offered by Microsoft Update and that are supported by Windows Server Update Services. For more information about the SMS 2003 ITMU, visit the following Microsoft Web site. SMS 2003 can also use the Microsoft Office Inventory Tool to detect required updates for Microsoft Office applications. Note for Windows VistaMicrosoft Systems Management Server 2003 with Service Pack 3 includes support for Windows Vista manageability. For more information about SMS, visit the SMS Web site. Note If you have used an Administrative Installation Point (AIP) for deploying Office 2000, Office XP or Office 2003, you may not be able to deploy the update using SMS if you have updated the AIP from the original baseline. For more information, see the Office Administrative Installation Point heading in this section. Office Administrative Installation Point If you installed your application from a server location, the server administrator must update the server location with the administrative update and deploy that update to your system. • For supported versions of Microsoft Office 2003, see Creating an Administrative Installation Point. If you have an Administrative Installation Point with a non-supported version of Microsoft Office 2003, see Microsoft Knowledge Base Article 902349. Note. If you plan to manage software updates centrally from an updated administrative image, you can find more information in the article Distributing Office 2003 Product Updates. For supported versions of the 2007 Microsoft Office system, see Create a network installation point for the 2007 Office system. • For supported versions of the 2007 Microsoft Office system, see Create a network installation point for the 2007 Office system. Note. If you plan to manage security updates centrally use Windows Server Update Services. For more information about how to deploy security updates for the 2007 Microsoft Office system using Windows Server Update Services, visit the Windows Server Update Services Web site. Top of section Security Update Deployment Affected Software For information about the specific security update for your affected software, click the appropriate link: * Windows 2000 (all editions) * Windows XP (all editions) * Windows Server 2003 (all editions) * Windows Vista (all editions) * Office 2003 Service Pack 2 * 2007 Microsoft Office System * Microsoft Office SharePoint Server and Microsoft Office Groove Server 2007 * Microsoft XML Core Services 4 When Installed on Windows (all versions) * Microsoft XML Core Services 6 When Installed on Windows (all versions) Other Information Acknowledgments Microsoft thanks the following for working with us to help protect customers: • An anonymous researcher working with the VeriSign iDefense VCP for reporting the Microsoft XML Core Services Vulnerability (CVE-2007-2223). • An anonymous researcher working with the Zero Day Initiative for reporting the Microsoft XML Core Services Vulnerability (CVE-2007-2223). Top of section 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. Top of section 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. Top of section Revisions • V1.0 (August 14, 2007): Bulletin published. • V1.1 (August 15, 2007): Bulletin updated: corrected file manifest information for Microsoft XML Core Services 4.0. • V2.0 (September 27, 2007): Bulletin updated: Added Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats and Microsoft Expression Web as affected products. The Bulletin has also been updated to inform customers that a potential reliability issue exists in applications that have installed Microsoft XML Core Services 4.0 on Windows Vista, which can be addressed by applying the download available in Microsoft Knowledge Base Article 941833. • V3.0 (January 9, 2008): Bulletin updated: Added Microsoft Word Viewer 2003 as an affected product. Also added an Update FAQ clarifying the kill bit for Microsoft XML Parser 2.6 and its applicability to this security update. • V4.0 (June 24, 2008): Bulletin updated: Added Windows XP Service Pack 3, Windows Vista Service Pack 1, Windows Vista x64 Edition Service Pack 1, Windows Server 2008 for 32-bit Systems, Windows Server 2008 for x64-based Systems, and Windows Server 2008 for Itanium-based Systems as affected software. This is a detection update only. There were no changes to the binaries. [***** End Microsoft Security Bulletin (MS07-042) *****] _______________________________________________________________________________ CIAC wishes to acknowledge the contributions of Microsoft for the information contained in this bulletin. _______________________________________________________________________________ CIAC, the Computer Incident Advisory Capability, is the computer security incident response team for the U.S. Department of Energy (DOE) and the emergency backup response team for the National Institutes of Health (NIH). CIAC is located at the Lawrence Livermore National Laboratory in Livermore, California. CIAC is also a founding member of FIRST, the Forum of Incident Response and Security Teams, a global organization established to foster cooperation and coordination among computer security teams worldwide. CIAC services are available to DOE, DOE contractors, and the NIH. CIAC can be contacted at: Voice: +1 925-422-8193 (7x24) FAX: +1 925-423-8002 STU-III: +1 925-423-2604 E-mail: ciac@ciac.org Previous CIAC notices, anti-virus software, and other information are available from the CIAC Computer Security Archive. World Wide Web: http://www.ciac.org/ Anonymous FTP: ftp.ciac.org PLEASE NOTE: Many users outside of the DOE, ESnet, and NIH computing communities receive CIAC bulletins. If you are not part of these communities, please contact your agency's response team to report incidents. Your agency's team will coordinate with CIAC. The Forum of Incident Response and Security Teams (FIRST) is a world-wide organization. A list of FIRST member organizations and their constituencies can be obtained via WWW at http://www.first.org/. This document was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor the University of California nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial products, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation or favoring by the United States Government or the University of California. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or the University of California, and shall not be used for advertising or product endorsement purposes. 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