Main Vulnerability Database Vulnerabilities #VU15876

Input validation error in Microsoft Windows and Windows Server - CVE-2018-8550

Published: November 13, 2018 / Updated: June 17, 2021

Vulnerability identifier: #VU15876

CSH Severity: Low

CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2018-8550

CWE-ID: CWE-20

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 insufficient validation in Windows COM Aggregate Marshaler when processing interface requests. A local unprivileged user can use this vulnerability in conjunction with another issue to execute arbitrary code on the system with elevated privileges.

Affected software

Microsoft Windows
Windows Server

How to mitigate CVE-2018-8550

Install updates from vendor's website.

Links to Public Exploits and PoC-codes

Exploit #6097 - Microsoft Windows - DfMarshal Unsafe Unmarshaling Privilege Escalation (June 17, 2021)

External References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8550

Related Security Bulletins

Privilege escalation in Windows COM Marshaler