===================================================================== CERT-Renater Note d'Information No. 2009/VULN327 _____________________________________________________________________ DATE : 12/08/2009 HARDWARE PLATFORM(S) : / OPERATING SYSTEM(S) : Microsoft Windows 2000, Windows XP, Windows XP Professional x64, Windows Server 2003, Windows Vista, Windows Server 2008, Mac OS X running Microsoft Remote Desktop Connection. ====================================================================== KB970927 http://www.microsoft.com/technet/security/bulletin/MS09-044.mspx ______________________________________________________________________ Microsoft Security Bulletin MS09-044 - Critical Vulnerabilities in Remote Desktop Connection Could Allow Remote Code Execution (970927) Published: August 11, 2009 Version: 1.0 General Information Executive Summary This security update resolves two privately reported vulnerabilities in Microsoft Remote Desktop Connection. The vulnerabilities could allow remote code execution if an attacker successfully convinced a user of Terminal Services to connect to a malicious RDP server or if a user visits a specially crafted Web site that exploits this vulnerability. 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 security update is rated Important for default versions of RDP on affected editions of Windows Vista, Windows Vista for x64-based Systems, and Remote Desktop Connection Client for Mac 2.0 and is rated Critical for all default versions of RDP on all other affected Windows editions. This security update is rated Important for RDP Version 6.0 that administrators can manually install on Windows Server 2003 Service Pack 2 and Windows Server 2003 x64 Edition Service Pack 2 and is rated Critical for all other versions of RDP that administrators can manually install on affected Windows editions. For more information, see the subsection, Affected and Non-Affected Software, in this section. The security update addresses the vulnerabilities by changing the way the Remote Desktop Connection deals with unexpected parameters sent by the RDP server and by correctly validating parameters passed to the Remote Desktop Connection ActiveX control methods. 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. The majority of customers have automatic updating enabled and will not need to take any action because this security update will be downloaded and installed automatically. Customers who have not enabled automatic updating need to check for updates and install this update manually. For information about specific configuration options in automatic updating, see Microsoft Knowledge Base Article 294871. For administrators and enterprise installations, or end users who want to install this security update manually, Microsoft recommends that customers apply the update immediately using update management software, or by checking for updates using the Microsoft Update service. Known Issues. Microsoft Knowledge Base Article 970927 documents the currently known issues that customers may experience when installing this security update. The article also documents recommended solutions for these issues. Affected Software Microsoft Windows 2000 Service Pack 4 Windows XP Service Pack 2 Windows XP Service Pack 2 Windows XP Service Pack 3 Windows XP Professional x64 Edition Service Pack 2 Windows XP Professional x64 Edition Service Pack 2 Windows Server 2003 Service Pack 2 Windows Server 2003 Service Pack 2 Windows Server 2003 x64 Edition Service Pack 2 Windows Server 2003 x64 Edition Service Pack 2 Windows Server 2003 with SP2 for Itanium-based Systems Windows Vista Windows Vista Service Pack 1 and Windows Vista Service Pack 2 Windows Vista x64 Edition Windows Vista x64 Edition Service Pack 1 and Windows Vista x64 Edition Service Pack 2 Windows Server 2008 for 32-bit Systems and Windows Server 2008 for 32-bit Systems Service Pack 2 Windows Server 2008 for x64-based Systems and Windows Server 2008 for x64-based Systems Service Pack 2 Windows Server 2008 for Itanium-based Systems and Windows Server 2008 for Itanium-based Systems Service Pack 2 Remote Desktop Connection Client for Mac 2.0 Vulnerability Information Remote Desktop Connection Heap Overflow Vulnerability - CVE-2009-1133 A remote code execution vulnerability exists in the way that Microsoft Remote Desktop Connection (formerly known as Terminal Services Client) processes specific parameters returned by the RDP server. An attacker who successfully exploited this vulnerability could take complete control of an affected system remotely. An attacker could then install programs or view, change, or delete data; or create new accounts with full user rights. Remote Desktop Connection ActiveX Control Heap Overflow Vulnerability - CVE-2009-1929 A remote code execution vulnerability exists in the Microsoft Terminal Services Client ActiveX control. An attacker could exploit the vulnerability by constructing a specially crafted Web page that could potentially allow remote code execution if a user visited that page. An attacker who successfully exploited this vulnerability could take complete control of an affected system. ====================================================================== ========================================================= Les serveurs de référence du CERT-Renater http://www.urec.fr/securite http://www.cru.fr/securite http://www.renater.fr ========================================================= + CERT-RENATER | tel : 01-53-94-20-44 + + 151 bd de l'Hopital | fax : 01-53-94-20-41 + + 75013 Paris | email: certsvp@renater.fr + =========================================================