Inclusion of Functionality from Untrusted Control Sphere in InsydeH2O Kernel - CVE-2020-27339
Published: February 3, 2022
Vulnerability identifier: #VU60268
CSH Severity: Low
CVSS v4: 7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-27339
CWE-ID: CWE-829
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to improper usage of Insyde firmware’s SMM services in the handler for IDE devices. A local administrator can gain escalated privileges or access to privileged information.
Affected software
InsydeH2O Kernel
How to mitigate CVE-2020-27339
Install updates from vendor's website.
InsydeH2O Kernel - addressed in versions 5.1 05.16.25, 5.2 05.25.44, 5.3 05.34.44, 5.4 05.42.44