CVE-2018-0821

Windows AppContainer Elevation Of Privilege Vulnerability

CVE-2018-0821 is fixed in 13 products on 1 platform, first by KB4074591, released February 13, 2018. It is not reported as exploited, but the vendor rates exploitation more likely. Patch Radar priority: Urgent.

Urgent
CVSS
5.3
Important
Exploitation
More likely
Vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0230
83rd percentile

<p>An elevation of privilege vulnerability exists when AppContainer improperly implements constrained impersonation. An attacker who successfully exploited this vulnerability could run processes in an elevated context.</p> <p>To exploit the vulnerability, an attacker would first have to log on to the system, and then run a specially crafted application to take control over the affected system.</p> <p>The security update addresses the vulnerability by correcting how AppContainer implements constrained impersonation.</p>

Where it's fixed

ProductFixed inFixReleased
Microsoft
Windows 10 Version 1511 for 32-bit Systems 10586.1417 KB4074591 Feb 13, 2018
Windows 10 Version 1511 for x64-based Systems 10586.1417 KB4074591 Feb 13, 2018
Windows 10 Version 1607 for 32-bit Systems 14393.2068 KB4074590 Feb 13, 2018
Windows 10 Version 1607 for x64-based Systems 14393.2068 KB4074590 Feb 13, 2018
Windows 10 Version 1703 for 32-bit Systems 15063.909 KB4074592 Feb 13, 2018
Windows 10 Version 1703 for x64-based Systems 15063.909 KB4074592 Feb 13, 2018
Windows 10 Version 1709 for 32-bit Systems 16299.248 KB4074588 Feb 13, 2018
Windows 10 Version 1709 for x64-based Systems 16299.248 KB4074588 Feb 13, 2018
Windows 10 for 32-bit Systems 10240.17770 KB4074596 Feb 13, 2018
Windows 10 for x64-based Systems 10240.17770 KB4074596 Feb 13, 2018
Windows Server 2016 14393.2068 KB4074590 Feb 13, 2018
Windows Server 2016 (Server Core installation) 14393.2068 KB4074590 Feb 13, 2018
Windows Server, version 1709 (Server Core Installation) 16299.248 KB4074588 Feb 13, 2018

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