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Out-of-Bounds Affecting libsepol package, versions <0:2.5-10.amzn2.0.1

medium

Snyk CVSS

    Attack Complexity Low

    Threat Intelligence

    EPSS 0.07% (30th percentile)
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NVD
3.3 low
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Red Hat
3.3 low

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  • Snyk ID SNYK-AMZN2-LIBSEPOL-6016208
  • published 20 Oct 2023
  • disclosed 1 Jul 2021
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Introduced: 1 Jul 2021

CVE-2021-36087 Open this link in a new tab
CWE-119 Open this link in a new tab

How to fix?

Upgrade Amazon-Linux:2 libsepol to version 0:2.5-10.amzn2.0.1 or higher.
This issue was patched in ALAS2-2023-2307.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libsepol package and not the libsepol package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 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.