Permissions, Privileges, and Access Controls in UsbCoreDxe - CVE-2021-43323
Published: February 3, 2022
Vulnerability identifier: #VU60285
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-2021-43323
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to escalate privileges on the system.
The vulnerability exists due to the SMM callout issue. A remote attacker can hijack execution flow of a code running in System Management Mode and escalate privileges.
Affected software
UsbCoreDxe
PA-3200
PA-5200
PA-7200
PA-3200
PA-5200
PA-7200
How to mitigate CVE-2021-43323
Install updates from vendor's website.
UsbCoreDxe - addressed in versions 5.0 05.08.45, 5.1 05.16.45, 5.2 05.26.45, 5.3 05.35.45, 5.4 05.43.45, 5.5 05.51.45