KLA10981
Multiple vulnerabilities in Microsoft Office

Multiple serious vulnerabilities have been found in Microsoft Office. Malicious users can exploit these vulnerabilities to cause a denial of service, gain privileges, obtain sensitive information, execute arbitrary code.

Below is a complete list of vulnerabilities:

1. An improper sanitizing of a specially designed web request to an affected SharePoint server can be exploited remotely to gain privileges;
2. An improper certificate validation in the Lync for Mac 2011 can be exploited remotely to bypass security restrictions;
3. Memory corruption vulnerabilities can be exploited remotely via a specially designed file or website to execute arbitrary code in the context of current user;
4. An improper disclosure of memory contents can be exploited remotely via a specially designed document to obtain sensitive information;
5. An unknown vulnerability can be exploited remotely via a specially designed file to cause a denial of service;
6. An out-of-bounds read due to an uninitialized variable can be exploited remotely via a specially designed file to obtain sensitive information.

Technical details

Vulnerability (1) can be exploited by an authenticated attacker;

Exploiting vulnerability (2) requires intercepting and tampering with network traffic.

Vulnerabilities (3) exist because of incorrect object handling in memory.

In case of vulnerabilities (3), you can use Microsoft Office block policy to reventing opening of RTF documents from either unknown or untrusted sources.

To exploit vulnerability (4), an attacker must know the memory adress location, where the object has been created.

Microsoft Office 2007
Microsoft Office 2010
Microsoft Office 2013
Microsoft Office 2013RT
Microsoft Office 2016
Microsoft Office for Mac 2011
Microsoft Office 2016 for Mac
Microsoft Office Compatibility Pack Service Pack 3 

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