Out-of-bounds Read Affecting libsepol-devel package, versions <0:2.9-3.el8


Severity

Recommended
medium

Based on Rocky Linux security rating.

Threat Intelligence

EPSS
0.48% (40th percentile)

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  • Snyk IDSNYK-ROCKY8-LIBSEPOLDEVEL-3223535
  • published5 Jan 2023
  • disclosed1 Jul 2021

Introduced: 1 Jul 2021

CVE-2021-36087  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade Rocky-Linux:8 libsepol-devel to version 0:2.9-3.el8 or higher.
This issue was patched in RLSA-2021:4513.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libsepol-devel package and not the libsepol-devel package as distributed by Rocky-Linux. See How to fix? for Rocky-Linux:8 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1