===================================================================== CERT-Renater Note d'Information No. 2009/VULN156 _____________________________________________________________________ DATE : 15/04/2009 HARDWARE PLATFORM(S) : / OPERATING SYSTEM(S) : Systems running Microsoft Internet Explorer. ====================================================================== KB963027 http://www.microsoft.com/technet/security/Bulletin/MS09-014.mspx ______________________________________________________________________ Microsoft Security Bulletin MS09-014 - Critical Cumulative Security Update for Internet Explorer (963027) Published: April 14, 2009 Version: 1.0 General Information Executive Summary This security update resolves four privately reported vulnerabilities and two publicly disclosed vulnerabilities in Internet Explorer. The vulnerabilities could allow remote code execution if a user views a specially crafted Web page using Internet Explorer or if a user connects to an attacker's server by way of the HTTP protocol. 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 Critical for Internet Explorer 5.01 and Internet Explorer 6 Service Pack 1, running on supported editions of Microsoft Windows 2000; Internet Explorer 6 and Internet Explorer 7 running on supported editions of Windows XP; and Internet Explorer 7 running on supported editions of Windows Vista. For Internet Explorer 6 and Internet Explorer 7 running on supported editions of Windows Server 2003 and Windows Server 2008, this security update is rated Important. For more information, see the subsection, Affected and Non-Affected Software, in this section. The security update addresses these vulnerabilities by modifying the way that Internet Explorer searches the system for files to load, performs authentication reply validation, handles transition errors when navigating between Web pages, and handles memory objects. For more information about the vulnerabilities, see the Frequently Asked Questions (FAQ) subsection under the next section, Vulnerability Information. Affected Software Internet Explorer 5.01 Service Pack 4 when installed on Microsoft Windows 2000 Service Pack 4 Internet Explorer 6 Service Pack 1 when installed on Microsoft Windows 2000 Service Pack 4 Internet Explorer 6 for Windows XP Service Pack 2 and Windows XP Service Pack 3 Internet Explorer 6 for Windows XP Professional x64 Edition and Windows XP Professional x64 Edition Service Pack 2 Internet Explorer 6 for Windows Server 2003 Service Pack 1 and Windows Server 2003 Service Pack 2 Internet Explorer 6 for Windows Server 2003 x64 Edition and Windows Server 2003 x64 Edition Service Pack 2 Internet Explorer 6 for Windows Server 2003 with SP1 for Itanium-based Systems and Windows Server 2003 with SP2 for Itanium-based Systems Internet Explorer 7 for Windows XP Service Pack 2 and Windows XP Service Pack 3 Internet Explorer 7 for Windows XP Professional x64 Edition and Windows XP Professional x64 Edition Service Pack 2 Internet Explorer 7 for Windows Server 2003 Service Pack 1 and Windows Server 2003 Service Pack 2 Internet Explorer 7 for Windows Server 2003 x64 Edition and Windows Server 2003 x64 Edition Service Pack 2 Internet Explorer 7 for Windows Server 2003 with SP1 for Itanium-based Systems and Windows Server 2003 with SP2 for Itanium-based Systems Internet Explorer 7 in Windows Vista and Windows Vista Service Pack 1 Internet Explorer 7 in Windows Vista x64 Edition and Windows Vista x64 Edition Service Pack 1 Internet Explorer 7 in Windows Server 2008 for 32-bit Systems* Internet Explorer 7 in Windows Server 2008 for x64-based Systems* Internet Explorer 7 in Windows Server 2008 for Itanium-based Systems *Windows Server 2008 server core installation not affected. Vulnerability Information Blended Threat Remote Code Execution Vulnerability - CVE-2008-2540 A blended threat remote code execution vulnerability exists in the way that Internet Explorer locates and opens files on the system. An attacker could exploit the vulnerability by constructing a specially crafted Web page. When a user views the Web page, the vulnerability could allow remote code execution. An attacker who successfully exploited this vulnerability could gain the same user rights as the logged-on user. If a user is logged on with administrative user rights, an attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. WinINet Credential Reflection Vulnerability - CVE-2009-0550 A remote code execution vulnerability exists in the way that WinINet handles NTLM credentials when a user connects to an attacker's server by way of the HTTP protocol. This vulnerability allows an attacker to replay the user's credentials back to the attacker and to execute code in the context of the logged-on user. If a user is logged on with administrative user rights, an attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Page Transition Memory Corruption Vulnerability - CVE-2009-0551 A remote code execution vulnerability exists in the way Internet Explorer handles transition when navigating between Web pages. As a result, system memory may be corrupted in such a way that an attacker could execute arbitrary code if a user visited a specially crafted Web site. An attacker who successfully exploited this vulnerability could gain the same user rights as the logged-on user. If a user is logged on with administrative user rights, an attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Uninitialized Memory Corruption Vulnerability - CVE-2009-0552 A remote code execution vulnerability exists in the way Internet Explorer accesses an object that has not been correctly initialized or has been deleted. An attacker could exploit the vulnerability by constructing a specially crafted Web page. When a user views the Web page, the vulnerability could allow remote code execution. An attacker who successfully exploited this vulnerability could gain the same user rights as the logged-on user. If a user is logged on with administrative user rights, an attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Uninitialized Memory Corruption Vulnerability - CVE-2009-0553 A remote code execution vulnerability exists in the way Internet Explorer accesses an object that has not been correctly initialized or has been deleted. An attacker could exploit the vulnerability by constructing a specially crafted Web page. When a user views the Web page, the vulnerability could allow remote code execution. An attacker who successfully exploited this vulnerability could gain the same user rights as the logged-on user. If a user is logged on with administrative user rights, an attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Uninitialized Memory Corruption Vulnerability - CVE-2009-0554 A remote code execution vulnerability exists in the way Internet Explorer accesses an object that has not been initialized or has been deleted. An attacker could exploit the vulnerability by constructing a specially crafted Web page. When a user views the Web page, the vulnerability could allow remote code execution. An attacker who successfully exploited this vulnerability could gain the same user rights as the logged-on user. ====================================================================== ========================================================= 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 + =========================================================