CVE-2022-21505

MEDIUM6.7

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

Published Dec 24, 2024

Modified 1 years ago

Details

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).

References

WEBhttps://git.kernel.org/linus/543ce63b664e2c2f9533d089a4664b559c3e6b5b ADVISORYhttps://linux.oracle.com/cve/CVE-2022-21505.html ADVISORYhttps://www.cve.org/CVERecord?id=CVE-2022-21505

CVSS Analysis

CVSS v3.1

6.7

Exploitability

Attack Vector

LocalAV:L

Attack Complexity

LowAC:L

Privileges Required

HighPR:H

User Interaction

NoneUI:N

Scope

UnchangedS:U

Impact

Confidentiality

HighC:H

Integrity

HighI:H

Availability

HighA:H

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

Ecosystems

Timeline

PublishedDec 24, 2024

ModifiedDec 27, 2024