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CVE-2021-36087

Public on 2021-07-01
Modified on 2023-10-05
Description

The CIL compiler in SELinux 3.2 has a heap-based buffer over-read in ebitmap_match_any (called indirectly from cil_check_neverallow). This occurs because there is sometimes a lack of checks for invalid statements in an optional block.

Severity
Low
See what this means
CVSS v3 Base Score
3.3
See breakdown

Affected Packages

Platform Package Release Date Advisory
Amazon Linux 2 - Core libsepol 2023-10-12 15:09 ALAS2-2023-2307
Amazon Linux 2 - Selinux-ng Extra libsepol 2023-08-07 05:23 ALAS2SELINUX-NG-2023-001
Amazon Linux 2023 libsepol 2023-02-17 20:43 ALAS2023-2023-017

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 3.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
NVD CVSSv2 2.1 AV:L/AC:L/Au:N/C:N/I:N/A:P
NVD CVSSv3 3.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

References

Red Hat: CVE-2021-36087 Mitre: CVE-2021-36087 FAQs regarding Amazon Linux ALAS/CVE Severity