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CVE-2023-52463

Public on 2024-02-23
Modified on 2024-03-13
Description

In the Linux kernel, the following vulnerability has been resolved: efivarfs: force RO when remounting if SetVariable is not supported If SetVariable at runtime is not supported by the firmware we never assign a callback for that function. At the same time mount the efivarfs as RO so no one can call that. However, we never check the permission flags when someone remounts the filesystem as RW. As a result this leads to a crash

Severity
Medium
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CVSS v3 Base Score
4.4
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Affected Packages

Platform Package Release Date Advisory
Amazon Linux 2 - Kernel-5.10 Extra kernel 2024-02-01 20:10 ALAS2KERNEL-5.10-2024-048
Amazon Linux 2 - Kernel-5.15 Extra kernel 2024-02-01 20:10 ALAS2KERNEL-5.15-2024-036
Amazon Linux 2023 kernel 2024-02-15 02:51 ALAS2023-2024-519

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 4.4 CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

References

Red Hat: CVE-2023-52463 Mitre: CVE-2023-52463 FAQs regarding Amazon Linux ALAS/CVE Severity