===================================================================== CERT-Renater Note d'Information No. 2010/VULN399 _____________________________________________________________________ DATE : 13/10/2010 HARDWARE PLATFORM(S) : / OPERATING SYSTEM(S) : Windows XP, Windows Server 2003, Windows Vista, Windows Server 2008, Windows 7 running Microsoft Internet Explorer versions 6, 7, 8. ====================================================================== KB2360131 http://www.microsoft.com/technet/security/bulletin/MS10-071.mspx ______________________________________________________________________ Microsoft Security Bulletin MS10-071 - Critical Cumulative Security Update for Internet Explorer (2360131) Version: 1.0 General Information Executive Summary This security update resolves eight privately reported vulnerabilities and two publicly disclosed vulnerabilities in Internet Explorer. The most severe vulnerabilities could allow remote code execution if a user views a specially crafted Web page using Internet Explorer. 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 6, Internet Explorer 7, and Internet Explorer 8 on Windows clients; and Important for Internet Explorer 6, Internet Explorer 7, and Internet Explorer 8 on Windows servers. 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 handles objects in memory, CSS special characters, HTML sanitization, the AutoComplete feature, the Anchor element, and script during certain processes. For more information about the vulnerabilities, see the Frequently Asked Questions (FAQ) subsection under the next section, Vulnerability Information. Affected Software Windows XP Professional x64 Edition Service Pack 2 Windows XP Service Pack 3 Windows Vista Service Pack 1 and Windows Vista Service Pack 2 Windows Vista x64 Edition Service Pack 1 and Windows Vista x64 Edition Service Pack 2 Windows 7 for 32-bit Systems Windows 7 for x64-based Systems Windows Server 2003 Service Pack 2 Windows Server 2003 with SP2 for Itanium-based Systems Windows Server 2003 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 Itanium-based Systems and Windows Server 2008 for Itanium-based 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 R2 for Itanium-based Systems Windows Server 2008 R2 for x64-based Systems Vulnerability Information AutoComplete Information Disclosure Vulnerability - CVE-2010-0808 An information disclosure vulnerability exists that potentially allows form data within Internet Explorer to be captured via the AutoComplete feature. An attacker could exploit the vulnerability by constructing a specially crafted Web page that could allow information disclosure if a user viewed the Web page. An attacker who successfully exploited this vulnerability could capture information previously entered into fields after the AutoComplete feature has been enabled. HTML Sanitization Vulnerability - CVE-2010-3243 An information disclosure vulnerability exists in the way that the toStaticHTML API sanitizes HTML, that could allow an attacker to perform cross-site scripting attacks and run script in the security context of the logged-on user. An attacker who successfully exploited this vulnerability could execute a cross-site scripting attack on the user, allowing the attacker to execute script in the user's security context against a site that is using the toStaticHTML API. HTML Sanitization Vulnerability - CVE-2010-3324 An information disclosure vulnerability exists in the way that the toStaticHTML API sanitizes HTML, that could allow an attacker to perform cross-site scripting attacks and run script in the security context of the logged-on user. An attacker who successfully exploited this vulnerability could execute a cross-site scripting attack on the user, allowing the attacker to execute script in the user's security context against a site that is using the toStaticHTML API. CSS Special Character Information Disclosure Vulnerability - CVE-2010-3325 An information disclosure vulnerability exists in the way that Internet Explorer processes CSS special characters. An attacker could exploit the vulnerability by constructing a specially crafted Web page that could allow information disclosure if a user viewed the Web page. An attacker who successfully exploited this vulnerability could view content from another domain or Internet Explorer zone. Uninitialized Memory Corruption Vulnerability - CVE-2010-3326 A remote code execution vulnerability exists in the way that 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. Anchor Element Information Disclosure Vulnerability - CVE-2010-3327 An information disclosure vulnerability exists in the way that Internet Explorer improperly handles the Anchor element. This behavior occurs during user operation when the Anchor element is not removed during content pasting and editing, potentially revealing Personally Identifiable Information intended for deletion. Uninitialized Memory Corruption Vulnerability - CVE-2010-3328 A remote code execution vulnerability exists in the way that 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-2010-3329 A remote code execution vulnerability exists in the way that Internet Explorer accesses an object that has not been correctly initialized or has been deleted when a document in an HTML format is opened in Microsoft Word. An attacker could exploit the vulnerability by convincing the user to open a malicious Word document. When a user closes the document, 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. Cross-Domain Information Disclosure Vulnerability - CVE-2010-3330 An information disclosure vulnerability exists in Internet Explorer that could allow script to gain access to information in another domain or Internet Explorer zone. An attacker could exploit the vulnerability by constructing a specially crafted Web page that could allow information disclosure if a user viewed the Web page. An attacker who successfully exploited this vulnerability could view content from another domain or Internet Explorer zone. Uninitialized Memory Corruption Vulnerability - CVE-2010-3331 A remote code execution vulnerability exists in the way that Internet Explorer accesses an object that has not been correctly initialized or has been deleted. An attacker could exploit the vulnerability by convincing a user to view a specially crafted Word document. When a user closes the Word document, 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. ====================================================================== ========================================================= 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 + + 23 - 25 Rue Daviel | fax : 01-53-94-20-41 + + 75013 Paris | email: certsvp@renater.fr + =========================================================