===================================================================== CERT-Renater Note d'Information No. 2008/VULN574 _____________________________________________________________________ DATE : 10/12/2008 HARDWARE PLATFORM(S) : / OPERATING SYSTEM(S) : Systems running Microsoft Office Excel. ====================================================================== KB959070 http://www.microsoft.com/technet/security/bulletin/ms08-074.mspx ______________________________________________________________________ Microsoft Security Bulletin MS08-074 - Critical Vulnerabilities in Microsoft Office Excel Could Allow Remote Code Execution (959070) Published: December 9, 2008 Version: 1.0 General Information Executive Summary This security update resolves three privately reported vulnerabilities in Microsoft Office Excel that could allow remote code execution if a user opens a specially crafted Excel file. An attacker who successfully exploited these vulnerabilities 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. 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 all supported editions of Microsoft Office Excel 2000. For all supported editions of Microsoft Office Excel 2002, Microsoft Office Excel 2003, Microsoft Office Excel Viewer 2003, Microsoft Office Excel 2007, Microsoft Office Compatibility Pack, Microsoft Office Excel Viewer, Microsoft Office 2004 for Mac, Microsoft Office 2008 for Mac, and Open XML File Format Converter for Mac, this security update is rated Important. For more information, see the subsection, Affected and Non-Affected Software, in this section. This security update addresses these vulnerabilities by modifying the way that Microsoft Office Excel opens Excel files. For more information about the vulnerability, 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. Microsoft Knowledge Base Article 959070 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 Office 2000 Service Pack 3 Microsoft Office Excel 2000 Service Pack 3 Microsoft Office XP Service Pack 3 Microsoft Office Excel 2002 Service Pack 3 Microsoft Office 2003 Service Pack 3 Microsoft Office Excel 2003 Service Pack 3 2007 Microsoft Office System Microsoft Office Excel 2007 2007 Microsoft Office System Service Pack 1 Microsoft Office Excel 2007 Service Pack 1 Microsoft Office Excel Viewer 2003 Microsoft Office Excel Viewer 2003 Service Pack 3 Microsoft Office Excel Viewer Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats Service Pack 1 Microsoft Office for Mac Microsoft Office 2004 for Mac Microsoft Office 2008 for Mac Open XML File Format Converter for Mac Vulnerability Information File Format Parsing Vulnerability - CVE-2008-4265 A remote code execution vulnerability exists in Microsoft Office Excel as a result of memory corruption when loading Excel records. The vulnerability could allow remote code execution if a user opens a specially crafted Excel file that includes a malformed object. 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. File Format Parsing Vulnerability - CVE-2008-4264 A remote code execution vulnerability exists in Microsoft Office Excel as a result of pointer corruption when loading Excel formulas. The vulnerability could allow remote code execution if a user opens a specially crafted Excel file that includes a malformed formula. 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. Excel Global Array Memory Corruption Vulnerability - CVE-2008-4266 A remote code execution vulnerability exists in Microsoft Office Excel as a result of stack corruption when loading Excel records. The vulnerability could allow remote code execution if a user opens a specially crafted Excel file that includes a malformed object. 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 + + 151 bd de l'Hopital | fax : 01-53-94-20-41 + + 75013 Paris | email: certsvp@renater.fr + =========================================================