CVE-2022-21505

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 Metrics

• v3.1•MEDIUM•Score: 6.7CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.07%• Percentile: 22%

Techniques & Countermeasures

• CWE-346•Origin Validation Error

  The product does not properly verify that the source of data or communication is valid.

Affected Systems

• oracle corporation•oracle linux

  Oracle Linux: 7 | Oracle Linux: 8 | Oracle Linux: 9

• oracle•linux

  7 | 8 | 9

References (2)

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