CVE-2020-1423: Windows Subsystem for Linux Elevation of Privilege Vulnerability

Overview

Severity

High (CVSS 7.8)

CVSS Vector

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C

Category

Elevation of Privilege

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2020-Jul

Released

2020-07-14

EPSS Score

0.28% (percentile: 51.3%)

Description

An elevation of privilege vulnerability exists in the way that the Windows Subsystem for Linux handles files. An attacker who successfully exploited the vulnerability could execute code with elevated privileges. To exploit the vulnerability, an attacker would first need code execution on a victim system. An attacker could then run a specially crafted application. The security update addresses the vulnerability by correcting how the Windows Subsystem for Linux handles files.

Affected Products (3)

Windows

• Windows 10 Version 2004 for x64-based Systems
• Windows 10 Version 2004 for ARM64-based Systems
• Windows Server, version 2004 (Server Core installation)

Security Updates (1)

• 4565503

Acknowledgments

<a href="github.com/gurnec">Christopher Gurnee</a>

Revision History

• 2020-07-14: Information published.