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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2012.1082 Vulnerabilities in Microsoft Excel Could Allow Remote Code Execution (2720184) 14 November 2012 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Microsoft Excel 2003 Microsoft Excel 2007 Microsoft Excel 2010 Microsoft Office for Mac 2011 Microsof Excel Viewer Microsoft Office Compatibility Pack Publisher: Microsoft Operating System: Windows Mac OS X Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction Resolution: Patch/Upgrade CVE Names: CVE-2012-2543 CVE-2012-1887 CVE-2012-1886 CVE-2012-1885 Original Bulletin: http://technet.microsoft.com/en-us/security/bulletin/MS12-076 - --------------------------BEGIN INCLUDED TEXT-------------------- Microsoft Security Bulletin MS12-076 - Important Vulnerabilities in Microsoft Excel Could Allow Remote Code Execution (2720184) Published Date: November 13, 2012 Version: 1.0 General Information Executive Summary This security update resolves four privately reported vulnerabilities in Microsoft Office. The vulnerabilities could allow remote code execution if a user opens a specially crafted Excel file with an affected version of Microsoft Excel. An attacker who successfully exploited this vulnerability could gain the same user rights as the current user. 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 all supported editions of Microsoft Excel 2003, Microsoft Excel 2007, Microsoft Excel 2010, Microsoft Office 2008 for Mac, and Microsoft Office for Mac 2011; it is also rated Important for supported versions of Microsoft Excel Viewer and Microsoft Office Compatibility Pack. Affected Software Microsoft Office 2003 Service Pack 3 Microsoft Office 2007 Service Pack 2 Microsoft Office 2007 Service Pack 3 [1] Microsoft Office 2010 Service Pack 1 (32-bit editions) Microsoft Office 2010 Service Pack 1 (64-bit editions) Microsoft Office for Mac Microsoft Office 2008 for Mac Microsoft Office for Mac 2011 Microsoft Excel Viewer [2] Microsoft Office Compatibility Pack Service Pack 2 Microsoft Office Compatibility Pack Service Pack 3 [1] For Microsoft Excel 2007, in addition to security update package KB2687307, customers also need to install the security update for the Microsoft Office Compatibility Pack (KB2687311) to be protected from the vulnerabilities described in this bulletin. [2] Microsoft Excel Viewer must be updated to a supported service pack level (Excel Viewer 2007 Service Pack 2 or Excel Viewer 2007 Service Pack 3) before installing this update. For information about supported Office viewers, see Microsoft Knowledge Base Article 979860. Vulnerability Information Excel SerAuxErrBar Heap Overflow Vulnerability - CVE-2012-1885 A remote code execution vulnerability exists in the way that Microsoft Excel handles specially crafted Excel files. 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 Memory Corruption Vulnerability - CVE-2012-1886 A remote code execution vulnerability exists in the way that Microsoft Excel handles specially crafted Excel files. 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 SST Invalid Length Use After Free Vulnerability - CVE-2012-1887 A remote code execution vulnerability exists in the way that Microsoft Excel handles specially crafted Excel files. 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 Stack Overflow Vulnerability - CVE-2012-2543 A remote code execution vulnerability exists in the way that Microsoft Excel handles specially crafted Excel files. 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. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). 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