KLA10661
Multiple vulnerabillities in Microsoft Office
Updated: 09/24/2015
CVSS
8.1
Detect date
09/08/2015
Severity
Critical
Description

Multiple serious vulnerabilities have been found in Microsoft Office. Malicious users can exploit these vulnerabilities to execute arbitrary code or conduct XSS attack.

Below is a complete list of vulnerabilities

  1. Improper memory objects handling can be exploited remotely via a specially designed file to execute arbitrary code;
  2. Improper user-supplied web-requests sanitization at SharePoint can be exploited remotely via a specially designed user content to conduct cross-site-scripting;
  3. An unknown vulnerability can be exploited remotely via a specially designed EPS file to execute arbitrary code.

 


Technical details

To exploit vulnerability (2) attacker must have ability to submit malicious content to a target site. In some conditions user content will not be sanitized. When user visits web page with malicious content? script could be run in security context of the user.

(3) could be exploited via specially designed EPS graphics contained in office document or when user inserts this graphics to office document. Also if Word is selected as default email reader (default) then attacker could send specially designed email contains malicious EPS graphics. In such conditions exploitations needs minimal users interaction (preview malicious email)

Affected products

Office 2007 Service Pack 3
Excel 2007 Service Pack 3
Office 2010 Service Pack 2
Excel 2010 Service Pack 2
Office 2013 Service Pack 1
Excel 2013 Service Pack 1
Office 2013 RT Service Pack 1
Excel 2013 RT Service Pack 1
Excel for Mac 2011
Excel for Mac 2016
Office Compatibility Pack  Service Pack 3
Excel Viewer
SharePoint Foundation 2013 Service Pack 1

Solution

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

Impacts
XSSCSS 
[?]

ACE 
[?]
Related products
Microsoft Excel
Microsoft Office
CVE-IDS

CVE-2015-2545
CVE-2015-2523
CVE-2015-2522
CVE-2015-2521
CVE-2015-2520

MS list

MS15-099

KB list

3054813
3085487
3085501
3085502
3085543
3085483
3088502
3088501
3054995
3054987
3054993
3089664
3054932
3054965
3085526

Original advisories

MS15-099

test label
test