CVE-2020-0638

Update Notification Manager Elevation of Privilege Vulnerability

CVE-2020-0638 is fixed in 20 products on 1 platform, first by KB4534276, released January 14, 2020. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on May 23, 2022, with known ransomware use. Patch Radar priority: Patch now.

Patch nowCISA KEVKnown ransomware use

CVSS

7.8

Important

Exploitation

Exploited

Listed by CISA

CISA KEV

May 23, 2022

Federal due date Jun 13, 2022. Known ransomware use

EPSS

0.0254

85th percentile

An elevation of privilege vulnerability exists in the way the Update Notification Manager handles files. To exploit this vulnerability, an attacker would first have to gain execution on the victim system. An attacker could then run a specially crafted application to elevate privileges. The security update addresses the vulnerability by correcting how the Update Notification Manager handles files.

Where it's fixed

Product	Fixed in	Fix	Released
Microsoft
Windows 10 Version 1709 for 32-bit Systems	16299.1625	KB4534276	Jan 14, 2020
Windows 10 Version 1709 for ARM64-based Systems	16299.1625	KB4534276	Jan 14, 2020
Windows 10 Version 1709 for x64-based Systems	16299.1625	KB4534276	Jan 14, 2020
Windows 10 Version 1803 for 32-bit Systems	17134.1246	KB4534293	Jan 14, 2020
Windows 10 Version 1803 for ARM64-based Systems	17134.1246	KB4534293	Jan 14, 2020
Windows 10 Version 1803 for x64-based Systems	17134.1246	KB4534293	Jan 14, 2020
Windows 10 Version 1809 for 32-bit Systems	17763.973	KB4534273	Jan 14, 2020
Windows 10 Version 1809 for ARM64-based Systems	17763.973	KB4534273	Jan 14, 2020
Windows 10 Version 1809 for x64-based Systems	17763.973	KB4534273	Jan 14, 2020
Windows 10 Version 1903 for 32-bit Systems		KB4528760	Jan 14, 2020
Windows 10 Version 1903 for ARM64-based Systems		KB4528760	Jan 14, 2020
Windows 10 Version 1903 for x64-based Systems		KB4528760	Jan 14, 2020
Windows 10 Version 1909 for 32-bit Systems		KB4528760	Jan 14, 2020
Windows 10 Version 1909 for ARM64-based Systems		KB4528760	Jan 14, 2020
Windows 10 Version 1909 for x64-based Systems		KB4528760	Jan 14, 2020
Windows Server 2019	17763.973	KB4534273	Jan 14, 2020
Windows Server 2019 (Server Core installation)	17763.973	KB4534273	Jan 14, 2020
Windows Server, version 1803 (Server Core Installation)	17134.1246	KB4534293	Jan 14, 2020
Windows Server, version 1903 (Server Core installation)		KB4528760	Jan 14, 2020
Windows Server, version 1909 (Server Core installation)		KB4528760	Jan 14, 2020

Details

Published
January 14, 2020
CISA required action
Apply updates per vendor instructions.
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-0638

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