CVE-2020-0858: Windows 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-Mar

Released

2020-03-10

EPSS Score

0.46% (percentile: 64.3%)

Description

An elevation of privilege vulnerability exists when the "Public Account Pictures" folder improperly handles junctions. 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 Windows handles junctions.

Affected Products (33)

Windows

• Windows 10 Version 1803 for 32-bit Systems
• Windows 10 Version 1803 for x64-based Systems
• Windows Server, version 1803 (Server Core Installation)
• Windows 10 Version 1803 for ARM64-based Systems
• Windows 10 Version 1809 for 32-bit Systems
• Windows 10 Version 1809 for x64-based Systems
• Windows 10 Version 1809 for ARM64-based Systems
• Windows Server 2019
• Windows Server 2019 (Server Core installation)
• Windows 10 Version 1709 for 32-bit Systems
• Windows 10 Version 1709 for x64-based Systems
• Windows 10 Version 1709 for ARM64-based Systems
• Windows 10 Version 1903 for 32-bit Systems
• Windows 10 Version 1903 for x64-based Systems
• Windows 10 Version 1903 for ARM64-based Systems
• Windows Server, version 1903 (Server Core installation)
• Windows 10 for 32-bit Systems
• Windows 10 for x64-based Systems
• Windows 10 Version 1607 for 32-bit Systems
• Windows 10 Version 1607 for x64-based Systems
• Windows Server 2016
• Windows Server 2016 (Server Core installation)
• Windows 8.1 for 32-bit systems
• Windows 8.1 for x64-based systems
• Windows RT 8.1
• Windows Server 2012
• Windows Server 2012 (Server Core installation)
• Windows Server 2012 R2
• Windows Server 2012 R2 (Server Core installation)
• Windows 10 Version 1909 for 32-bit Systems
• Windows 10 Version 1909 for x64-based Systems
• Windows 10 Version 1909 for ARM64-based Systems
• Windows Server, version 1909 (Server Core installation)

Security Updates (10)

• 4540689
• 4538461
• 4540681
• 4540673
• 4540693
• 4540670
• 4541509
• 4541505
• 4541510
• 4540694

Acknowledgments

<a href="https://twitter.com/clavoillotte">Clément Lavoillotte @clavoillotte</a> of <a href="https://almond.consulting/">Almond</a>, Zhiniang Peng (<a href="https://twitter.com/edwardzpeng">@edwardzpeng</a>) of Qihoo 360 Core security & Xuefeng Li, Wenxu Wu <a href="https://twitter.com/ma7h1as">(@ma7h1as)</a> of <a href="http://xlab.tencent.com">Tencent Security Xuanwu Lab</a>, Gábor Selján (@GaborSeljan)

Revision History

• 2020-03-10: Information published.