![]() For information about automatic updating in supported editions of Windows Vista, Windows Server 2008, Windows 7, and Windows Server 2008 R2, see Understanding Windows automatic updating.įor administrators and enterprise installations, or end users who want to install this security update manually, Microsoft recommends that customers apply the update at the earliest opportunity using update management software, or by checking for updates using the Microsoft Update service. For information about specific configuration options in automatic updating in supported editions of Windows XP and Windows Server 2003, see Microsoft Knowledge Base Article 294871. Customers who have not enabled automatic updating need to check for updates from Microsoft Update and install this update manually. Customers who have automatic updating enabled and configured to check online for updates from Microsoft Update typically will not need to take any action because this security update will be downloaded and installed automatically. Recommendation. Customers can configure automatic updating to check online for updates from Microsoft Update by using the Microsoft Update service. For more information about the vulnerability, see the Frequently Asked Questions (FAQ) subsection for the specific vulnerability entry under the next section, Vulnerability Information. The update addresses the vulnerabilities by correcting the way that Microsoft Excel manages objects in memory, indexes an array of memory locations, parses certain records in Excel files, handles a particular type of conditional expression, and conducts bounds checking on array index values. For more information, see the subsection, Affected and Non-Affected Software, in this section. This security update is rated Important for all supported editions of Microsoft Excel 2003, Microsoft Excel 2007, Microsoft Office 2007, Microsoft Excel 2010, Microsoft Office 2010, Microsoft Office 2004 for Mac, Microsoft Office 2008 for Mac, and Microsoft Office for Mac 2011 Open XML File Format Converter for Mac and all supported versions of Microsoft Excel Viewer, Microsoft Office Compatibility Pack, Microsoft Excel Services installed on SharePoint Server 2007, Microsoft Excel Services installed on SharePoint Server 2010, and Microsoft Excel Web App 2010. See the section, Frequently Asked Questions (FAQ) Related to This Security Update, for more information about how the Office File Validation feature can be configured to block the attack vectors. Installing and configuring Office File Validation (OFV) to prevent the opening of suspicious files blocks the attack vectors for exploiting the vulnerabilities described in CVE-2011-1986 and CVE-2011-1987. 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. An attacker who successfully exploited any of these vulnerabilities could gain the same user rights as the logged-on user. ![]() The vulnerabilities could allow remote code execution if a user opens a specially crafted Excel file. This security update resolves five privately reported vulnerabilities in Microsoft Office. Version: 1.1 General Information Executive Summary Published: Septem| Updated: October 11, 2011 Security Bulletin Microsoft Security Bulletin MS11-072 - Important Vulnerabilities in Microsoft Excel Could Allow Remote Code Execution (2587505)
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