Vulnerabilities in Microsoft SharePoint Server Could Allow Remote Code Execution (2834052)
Executive Summary
This security update resolves one publicly disclosed vulnerability and nine privately reported vulnerabilities in Microsoft Office Server software. The most severe vulnerability could allow remote code execution in the context of the W3WP service account if an attacker sends specially crafted content to the affected server.
This security update is rated Critical for supported editions of Microsoft SharePoint Server 2007, Microsoft SharePoint Server 2010, Microsoft SharePoint Services 2.0, Microsoft SharePoint Services 3.0, and Microsoft SharePoint Foundation 2010. This security update is also rated Critical for affected Microsoft Office Services and Web Apps on supported editions of Microsoft SharePoint Server 2010. In addition, this security update is rated Important for Microsoft SharePoint Server 2013, Microsoft SharePoint Foundation 2013, and Excel Services on Microsoft SharePoint Server 2007. For more information, see the subsection, Affected and Non-Affected Software, in this section.
The security update addresses the vulnerabilities by enabling machine authentication check (MAC) according to best practices, correcting how SharePoint Server sanitizes requests, correcting how SharePoint Server verifies and handles undefined workflows, and correcting how Microsoft Office Services and Web Apps parse specially crafted files. For more information about the vulnerabilities, see the Frequently Asked Questions (FAQ) subsection for the specific vulnerability entry under the next section, Vulnerability Information.
Recommendation. Customers can configure automatic updating to check online for updates from Microsoft Update by using the Microsoft Update service. 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. Customers who have not enabled automatic updating need to check for updates from Microsoft Update and install this update manually. For information about specific configuration options in automatic updating, see Microsoft Knowledge Base Article 294871.
For administrators and enterprise installations, or end users who want to install this security update manually, Microsoft recommends that customers apply the update immediately using update management software, or by checking for updates using the Microsoft Update service.