Buffer overflow in InsydeH2O Kernel - CVE-2021-45971
Published: February 3, 2022
Vulnerability identifier: #VU60277
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-45971
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in the SMM (System Management Mode) branch that registers a SWSMI handler. A remote attacker can trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
InsydeH2O Kernel
How to mitigate CVE-2021-45971
Install updates from vendor's website.
InsydeH2O Kernel - addressed in versions 5.1 05.16.25, 5.2 05.26.25, 5.3 05.35.25, 5.4 05.43.25, 5.5 05.51.25