CVE-2022-21505 Information

Description

In the linux kernel if IMA appraisal is used with the \ima_appraise=log\ boot param lockdown can be defeated with kexec on any machine when Secure Boot is disabled or unavailable. IMA prevents setting \ima_appraise=log\ from the boot param when Secure Boot is enabled but this does not cover cases where lockdown is used without Secure Boot. CVSS 3.1 Base Score 6.7 (Confidentiality Integrity Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H).

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Reference

https://git.kernel.org/linus/543ce63b664e2c2f9533d089a4664b559c3e6b5b https://linux.oracle.com/cve/CVE-2022-21505.html

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction Required

HIGH

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

6.7