KLA10675
Multiple vulnerabilities in Microsoft Office

Multiple serious vulnerabilities have been found in Microsoft Office. Malicious users can exploit these vulnerabilities to bypass security restrictions, spoof user interface, execute arbitrary code or obtain sensitive information.

Below is a complete list of vulnerabilities

1. Improper memory objects handling can be exploited remotely via a specially designed office file to execute arbitrary code;
2. Improper Document Type Definition parsing at SharePoint InfoPath Forms Services can be exploited remotely via a specially designed file to obtain sensitive information;
3. Improper request sanitization at Office Web Apps can be exploited remotely via a specially designed URL to spoof user interface.
4. Lack of permission restrictions at Microsoft SharePoint can be exploited remotely via a specially designed Office Marketplace instance.

Technical details

To exploit vulnerabilities (2,4) malicious user must be logged in or anonymous access must be enabled

Microsoft Excel 2007 Service Pack 3
Microsoft Visio 2007 Service Pack 3
Microsoft Excel 2010 Service Pack 2
Microsoft Visio 2010 Service Pack 2
Microsoft Excel 2013 Service Pack 1
Microsoft Excel 2013 RT Service Pack 1
Microsoft Excel 2016
Microsoft Excel 2016 for Mac
Microsoft Excel Viewer
Microsoft Office Compatibility Pack Service Pack 3
Excel Services on Microsoft SharePoint Server 2007 Service Pack 3
Excel Services on Microsoft SharePoint Server 2010 Service Pack 2
Excel Services on Microsoft SharePoint Server 2013 Service Pack 1
Microsoft Office Web Apps 2010 Service Pack 2
Microsoft Office Web Apps Server 2013 Service Pack 1
Microsoft SharePoint Server 2010 Service Pack 2
Microsoft SharePoint Server 2013 Service Pack 1
Microsoft SharePoint Foundation 2013 Service Pack 1

Install necessary updates from the KB section, that are listed in your Windows Update (Windows Update usually can be accessed from the Control Panel)