CVE-2018-0851

Microsoft Office Memory Corruption Vulnerability

CVE-2018-0851 is fixed in 9 products on 1 platform, first by KB4011715, released February 13, 2018. It is not reported as exploited, but the vendor rates exploitation more likely. Patch Radar priority: Urgent.

Urgent
CVSS
n/a
Important
Exploitation
More likely
Vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.1911
97th percentile

<p>A remote code execution vulnerability exists in Microsoft Office software when the Office software fails to properly handle objects in memory. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the current user. If the current user is logged on with administrative user rights, an attacker could take control of the affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.</p> <p>Exploitation of the vulnerability requires that a user 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 designed to exploit the vulnerability. An attacker would have no way to force users to visit the website. Instead, an attacker would have to convince users to click a link, typically by way of an enticement in an email or instant message, and then convince them to open the specially crafted file.</p> <p>Note that the Preview Pane is not an attack vector for this vulnerability. The security update addresses the vulnerability by correcting how Office handles objects in memory.</p>

Where it's fixed

ProductFixed inFixReleased
Microsoft
Microsoft Office 2007 Service Pack 3 KB4011715 Feb 13, 2018
Microsoft Office 2010 Service Pack 2 (32-bit editions) KB4011707 Feb 13, 2018
Microsoft Office 2010 Service Pack 2 (64-bit editions) KB4011707 Feb 13, 2018
Microsoft Office 2013 RT Service Pack 1 KB4011690 Feb 13, 2018
Microsoft Office 2013 Service Pack 1 (32-bit editions) KB4011690 Feb 13, 2018
Microsoft Office 2013 Service Pack 1 (64-bit editions) KB4011690 Feb 13, 2018
Microsoft Office 2016 (32-bit edition) KB4011686 Feb 13, 2018
Microsoft Office 2016 (64-bit edition) KB4011686 Feb 13, 2018
Microsoft Office Word Viewer KB4011703 Feb 13, 2018

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