Main Vulnerability Database Vulnerabilities #VU25182

Use-after-free in Microsoft Windows and Windows Server - CVE-2020-0731

Published: February 11, 2020 / Updated: May 5, 2020

Vulnerability identifier: #VU25182

CSH Severity: Low

CVSS v4: 7.3 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2020-0731

CWE-ID: CWE-416

Exploitation vector: Local access

Exploit availability: Public exploit is available

Vulnerability details

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error when processing objects in memory in win32kbase HMMarkObjectDestroy within the Win32k component. A local user can create a malicious application, launch it on the system and execute arbitrary code with SYSTEM privileges.

Affected software

Microsoft Windows
Windows Server
Solutions Enabler Virtual Appliance
Solutions Enabler
Unisphere for PowerMax Virtual Appliance
Unisphere for PowerMax

How to mitigate CVE-2020-0731

Install update from vendor's website.

Solutions Enabler Virtual Appliance - addressed in versions 9.0.0.19, 9.1.0.6
Solutions Enabler - addressed in versions 9.0.0.19, 9.1.0.6
Unisphere for PowerMax Virtual Appliance - addressed in versions 9.0.2.18, 9.1.0.17
Unisphere for PowerMax - addressed in versions 9.0.2.18, 9.1.0.17

Links to Public Exploits and PoC-codes

Exploit #2628 - Windows 10 win32kbase HMMarkObjectDestroy Arbitrary Code Execution Vulnerability Regression (May 5, 2020)

External References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0731