Main Vulnerability Database Vulnerabilities #VU15834

Buffer overflow in Microsoft Windows and Windows Server - CVE-2018-8589

Published: November 13, 2018 / Updated: June 2, 2020

Vulnerability identifier: #VU15834

CSH Severity: Medium

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-2018-8589

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 escalate privileges on the system.

The vulnerability exists due to a boundary error within Win32k.sys driver. A local user can create a specially crafted application, run it on vulnerable system and execute code withe superuser privileges.

Note: this vulnerability is being actively exploited in limited targeted attacks.

Affected software

Microsoft Windows
Windows Server

How to mitigate CVE-2018-8589

Install updates from vendor's website.

Links to Public Exploits and PoC-codes

Exploit #2795 - WindowsExploitationResources (Resources pertaining to advanced Windows exploit development and semi-related topics) (June 2, 2020)

External References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8589

Related Security Bulletins

Privilege escalation in Windows Win32k.sys driver