__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN Microsoft Buffer Overrun in Microsoft FrontPage Server Extensions [MS03-051] November 11, 2003 19:00 GMT Number O-024 [REVISION 13 Nov 2003] [REVISED 17 Nov 2003] ______________________________________________________________________________ PROBLEM: There are two new vulnerabilities in the FrontPage Server Extensions: 1) A buffer overrun in the remote debug functionality of FrontPage Server Extensions. 2) A denial of service vulnerability in the SmartHTML interpreter. PLATFORM: Microsoft Windows 2000 Service Pack 2, Service Pack 3 Microsoft Windows XP, Microsoft Windows XP Service Pack 1 Microsoft Office XP, Microsoft Office XP Service Pack 1, Service Pack 2 Affected Components: Microsoft FrontPage Server Extensions 2000 Microsoft FrontPage Server Extensions 2000 (Shipped with Windows 2000) Microsoft FrontPage Server Extensions 2000 (Shipped with Windows XP) Microsoft FrontPage Server Extensions 2002 Microsoft SharePoint Team Services 2002 (shipped with Office XP) DAMAGE: 1) An attacker could be able to run code with Local System privileges on an affected system, could cause FrontPage Server Extensions to fail, take any action on the system, including installing programs, viewing, changing or deleting data, or creating new accounts with full privileges. 2) An attacker could cause a server running FrontPage Server Extensions to temporarily stop responding to requests. SOLUTION: Install the security update immediately. NOTE--This update replaces the security updates contained in the following bulletins: MS01-035 and MS02-053 (CIAC Bulletins L-100, M-129). ______________________________________________________________________________ VULNERABILITY The risk is HIGH. An attacker with the privileges to remotely ASSESSMENT: access the FrontPage Server Extensions could run arbitrary code on a user's system. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/o-024.shtml ORIGINAL BULLETIN: Microsoft Security Bulletin MS03-051 http://www.microsoft.com/technet/treeview/default.asp?url= /technet/security/bulletin/MS03-051.asp CVE/CAN: http://www.cve.mitre.org/cgi-bin/cvename.cgi?name= CVE-2003-0822 CVE-2003-0824 ______________________________________________________________________________ REVISION HISTORY: 11/13/03 - CIAC has updated CIAC O-024 to reflect the changes in Microsoft's MS03-051, Technical Details Section on what actions an attacker could take if they were to successfully exploit this vulnerability. 11/17/03 - CIAC has updated CIAC O-024 to reflect the following changes in Microsoft's MS03-051: the affected versions of Microsoft Office; Technical Details section on what actions an attacker could take if they exploit this vulnerability; and in the Workaround section they have removed where customers can use IIS Lockdown Tool to disable FrontPage Server Extensions on an IIS Server. [***** Start MS03-051 *****] Microsoft Security Bulletin MS03-051 Buffer Overrun in Microsoft FrontPage Server Extensions Could Allow Code Execution (813360) Issued: November 14, 2003 Version: 1.0 Summary Who should read this document: Customers using Microsoft® FrontPage Server Extensions ® Impact of vulnerability: Remote Code Execution Maximum Severity Rating: Critical Recommendation: Customers should install the security update immediately Security Update Replacement: This update replaces the security updates contained in the following bulletins: MS01-035 and MS02-053. Caveats: None Tested Software and Security Update Download Locations: Affected Software: * Microsoft Windows 2000 Service Pack 2, Service Pack 3 * Microsoft Windows XP, Microsoft Windows XP Service Pack 1 * Microsoft Office XP, Microsoft Office XP Service Pack 1, Service Pack 2 Non Affected Software: * Microsoft Windows Millennium Edition * Microsoft Windows NT Workstation 4.0, Service Pack 6a * Microsoft Windows NT Server 4.0, Service Pack 6a * Microsoft Windows NT Server 4.0, Terminal Server Edition, Service Pack 6 * Microsoft Windows 2000 Service Pack 4 * Microsoft Windows XP 64-Bit Edition Version 2003 * Microsoft Windows Server 2003 (Windows SharePoint Services) * Microsoft Windows Server 2003 64-Bit Edition (Windows SharePoint Services) * Microsoft Office System 2003 Tested Microsoft Windows and Office Components: Affected Components: * Microsoft FrontPage Server Extensions 2000 - Download the update * Microsoft FrontPage Server Extensions 2000 (Shipped with Windows 2000) – Download the update * Microsoft FrontPage Server Extensions 2000 (Shipped with Windows XP) – Download the update * Microsoft FrontPage Server Extensions 2002 - Download the update * Microsoft SharePoint Team Services 2002 (shipped with Office XP) - Download the update (To determine what version of FrontPage Server Extension that is installed on your system please see the first question in the FAQ Section of this bulletin.) The software listed above has been tested to determine if the versions are affected. Other versions are no longer supported, and may or may not be affected. Technical Details Technical description: This bulletin addresses two new security vulnerabilities in Microsoft FrontPage Server Extensions, the most serious of which could enable an attacker to run arbitrary code on a user's system. The first vulnerability exists because of a buffer overrun in the remote debug functionality of FrontPage Server Extensions. This functionality enables users to remotely connect to a server running FrontPage Server Extensions and remotely debug content using, for example, Visual Interdev. An attacker who successfully exploited this vulnerability could be able to run code with IWAM_machinename account privileges on an affected system, or could cause FrontPage Server Extensions to fail. The second vulnerability is a Denial of Service vulnerability that exists in the SmartHTML interpreter. This functionality is made up of a variety of dynamic link library files, and exists to support certain types of dynamic web content. An attacker who successfully exploited this vulnerability could cause a server running Front Page Server Extensions to temporarily stop responding to requests. Mitigating factors: * Administrators that have applied Service Pack 4 on Windows 2000 systems are not affected by these vulnerabilities * Windows XP does not have FrontPage Server Extensions installed by default * Windows NT 4.0 does not have FrontPage Server Extensions installed by default unless you have applied Windows NT4.0 Option Pack Severity Rating: **************************************************************** Microsoft FrontPage Server Extensions 2000 Critical **************************************************************** Microsoft FrontPage Server Extensions 2000 Critical (Shipped with Windows 2000) **************************************************************** Microsoft FrontPage Server Extensions 2000 Moderate (Shipped with Windows XP) **************************************************************** Microsoft FrontPage Server Extensions 2002 Critical (shipped with Office XP) **************************************************************** Microsoft SharePoint Team Services 2002 Critical **************************************************************** The above assessment is based on the types of systems affected by the vulnerability, their typical deployment patterns, and the effect that exploiting the vulnerability would have on them. Vulnerability identifier for the Buffer Overrun vulnerability: CAN-2003-0822 Vulnerability identifier for SmartHTML interpreter vulnerability: CAN-2003-0824 Workarounds Microsoft has tested the following workarounds that apply across all the vulnerabilities. These workarounds help block known attack vectors, however they will not correct the underlying vulnerabilities. Workarounds may reduce functionality in some cases; in such cases, the reduction in functionality is identified below. FrontPage Server Extensions administrators can uninstall FrontPage Server Extensions in Add or Remove programs From the Start button, choose Control Panel. 1. Select Add or Remove programs. 2. Select Add/Remove Windows Components. 3. Select "Internet Information Services (IIS)" and choose "Details…". 4. Uncheck "FrontPage 2000 Server Extensions" and choose OK. 5. Choose Next in the Windows Components Wizard and choose Finish. Impact of workaround: With FrontPage Server Extensions uninstalled or disabled webpage and server functionality relying on them will be unavailable or will not operate as expected. Security Update Information Installation platforms and Prerequisites: For information about the specific security update for your platform, click the appropriate link: * Microsoft FrontPage Server Extensions 2000 * Microsoft FrontPage Server Extensions 2000 (Shipped with Windows 2000) * Microsoft FrontPage Server Extensions 2000 (Shipped with Windows XP) * Microsoft FrontPage Server Extensions 2002 (Shipped with Office XP) * Microsoft SharePoint Team Services 2002 Acknowledgments Microsoft http://www.microsoft.com/technet/security/bulletin/policy.asp for working with us to protect customers: * Brett Moore of Security-Assessment.com for reporting the issue in MS03-051. Obtaining other security updates: Updates for other security issues are available from the following locations: * Security updates are available from the Microsoft Download Center, and can be most easily found by doing a keyword search for "security_patch". * Updates for consumer platforms are available from the WindowsUpdate web site * Updates for Microsoft Office Family products are available from the Office Update web site. Support: * Technical support is available from Microsoft Product Support Services at 1-866-PCSAFETY. There is no charge for support calls associated with security patches. * International customers can get support from their local Microsoft subsidiaries. There is no charge for support associated with security updates. Information on how to contact Microsoft support is available at http://support.microsoft.com/common/international.aspx Security Resources: * The Microsoft TechNet Security Web Site provides additional information about security in Microsoft products. * Microsoft Software Update Services: http://www.microsoft.com/sus/ * Microsoft Baseline Security Analyzer (MBSA) details: http://www.microsoft.com/mbsa. Please see http://support.microsoft.com/default.aspx?scid=kb;EN-US;306460 for list of security updates that have detection limitations with MBSA tool. * Windows Update Catalog: http://support.microsoft.com/default.aspx?scid=kb;EN-US;323166 * Windows Update: http://windowsupdate.microsoft.com * Office Update: http://office.microsoft.com/officeupdate/ * Software Update Services (SUS): Microsoft Software Update Services (SUS) enables administrators to quickly and reliably deploy the latest critical updates and security updates to Windows® 2000 and Windows Server™ 2003-based servers, as well as to desktop computers running Windows 2000 Professional or Windows XP Professional. For information about how to deploy this security patch with Software Update Services, visit the following Microsoft Web site: http://www.microsoft.com/sus/ Systems Management Server (SMS): Systems Management Server can provide assistance deploying this security update. For information about Systems Management Server visit the SMS Web Site. SMS also provides several additional tools to assist administrators in the deployment of security updates such as the SMS 2.0 Software Update Services Feature Pack and the SMS 2.0 Administration Feature Pack. The SMS 2.0 Software Update Services Feature Pack utilizes the Microsoft Baseline Security Analyzer and the Microsoft Office Detection Tool to provide broad support for security bulletin remediation. Some software updates may require administrative rights following a restart of the computer. Note: The inventory capabilities of the SMS 2.0 Software Update Services Feature Pack may be used for targeting updates to specific computers, and the SMS 2.0 Administration Feature Pack's Elevated Rights Deployment Tool can be used for installation. This provides optimal deployment for updates that require explicit targeting using Systems Management Server and administrative rights after the computer has been restarted. 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 (November 11, 2003): Bulletin published. V1.1 November 12, 2003: Updated information on what actions an attacker could take if they were to successfully exploit this vulnerability. V1.2 November 14, 2003: Updated information on affected versions of Microsoft Office, updated information in the workarounds section. [***** End MS03-051 *****] _______________________________________________________________________________ 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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