CVE-2017-8631

Microsoft Office Remote Code Execution Vulnerability

CVE-2017-8631 is fixed in 17 products on 1 platform, first by KB3191831, released September 12, 2017. It is not reported as exploited. Patch Radar priority: High.

High
CVSS
n/a
Important
Exploitation
None reported
Exploitation Less Likely
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.1699
97th percentile

<p>A remote code execution vulnerability exists in Microsoft Office software when it fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could use a specially crafted file to perform actions in the security context of the current user. For example, the file could then take actions on behalf of the logged-on user with the same permissions as the current user.</p> <p>To exploit the vulnerability, a user must open a specially crafted file with an affected version of Microsoft Office software. In an email attack scenario, an attacker could exploit the vulnerability by sending the specially crafted file to the user and convincing the user to open the file. In a web-based attack scenario, an attacker could host a website (or leverage a compromised website that accepts or hosts user-provided content) that contains a specially crafted file that is designed to exploit the vulnerability. However, an attacker would have no way to force the user to visit the website. Instead, an attacker would have to convince the user to click a link, typically by way of an enticement in an email or Instant Messenger message, and then convince the user to open the specially crafted file.</p> <p>The security update addresses the vulnerability by correcting how Microsoft Office handles files in memory.</p>

Where it's fixed

ProductFixed inFixReleased
Microsoft
Excel Services on Microsoft SharePoint Server 2007 Service Pack 3 (32-bit editions) KB3191831 Sep 12, 2017
Excel Services on Microsoft SharePoint Server 2007 Service Pack 3 (64-bit editions) KB3191831 Sep 12, 2017
Excel Services on Microsoft SharePoint Server 2010 Service Pack 2 KB4011056 Sep 12, 2017
Microsoft Excel 2007 Service Pack 3 KB4011062 Sep 12, 2017
Microsoft Excel 2010 Service Pack 2 (32-bit editions) KB4011061 Sep 12, 2017
Microsoft Excel 2010 Service Pack 2 (64-bit editions) KB4011061 Sep 12, 2017
Microsoft Excel 2013 RT Service Pack 1 KB4011108 Sep 12, 2017
Microsoft Excel 2013 Service Pack 1 (32-bit editions) KB4011108 Sep 12, 2017
Microsoft Excel 2013 Service Pack 1 (64-bit editions) KB4011108 Sep 12, 2017
Microsoft Excel 2016 (32-bit edition) KB4011050 Sep 12, 2017
Microsoft Excel 2016 (64-bit edition) KB4011050 Sep 12, 2017
Microsoft Excel Viewer 2007 Service Pack 3 KB4011065 Sep 12, 2017
Microsoft Excel Web App 2013 Service Pack 1 KB3213562 Sep 15, 2017
Microsoft Excel for Mac 2011 KB3212225 Sep 12, 2017
Microsoft Office Compatibility Pack Service Pack 3 KB4011064 Sep 12, 2017
Microsoft Office Web Apps 2013 Service Pack 1 KB3213562 Sep 15, 2017
Office Online Server KB3213658 Sep 12, 2017