Main Vulnerability Database Vulnerabilities #VU16465

Memory corruption in Microsoft Windows and Windows Server - CVE-2018-8639

Published: December 11, 2018 / Updated: November 20, 2020

Vulnerability identifier: #VU16465

CSH Severity: Low

CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2018-8639

CWE-ID: CWE-119

Exploitation vector: Local access

Exploit availability: The vulnerability is being exploited in the wild

Vulnerability details

The vulnerability allows a local user to gain elevated privileges on the target system.

The vulnerability exists due to a boundary error in Windows kernel-mode driver win32k.sys. A local user can use a specially crafted application to execute arbitrary code with SYSTEM privileges.

Affected software

Microsoft Windows
Windows Server

How to mitigate CVE-2018-8639

Install updates from vendor's website.

External References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8639

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