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CVE-2016-20021: Gentoo Portage missing PGP validation of executed code

January 12, 2024 (updated August 30, 2024)

In Gentoo Portage before 3.0.47, there is missing PGP validation of executed code: the standalone emerge-webrsync downloads a .gpgsig file but does not perform signature verification.

References

  • bugs.gentoo.org/597800
  • github.com/advisories/GHSA-pw5x-x5jw-ccmh
  • github.com/gentoo/portage
  • github.com/gentoo/portage/commit/28cd240fb23d880b8641a058831c6762db71c3e2
  • github.com/pypa/advisory-database/tree/main/vulns/portage/PYSEC-2024-10.yaml
  • gitweb.gentoo.org/proj/portage.git/tree/NEWS
  • gitweb.gentoo.org/repo/gentoo.git/commit/?id=5b3c80502e96406b4b175e2ee79eb65f3f3cd9f6
  • nvd.nist.gov/vuln/detail/CVE-2016-20021
  • wiki.gentoo.org/wiki/Portage

Code Behaviors & Features

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Affected versions

All versions before 3.0.47

Fixed versions

  • 3.0.47

Solution

Upgrade to version 3.0.47 or above.

Impact 9.8 CRITICAL

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

Learn more about CVSS

Weakness

  • CWE-347: Improper Verification of Cryptographic Signature

Source file

pypi/portage/CVE-2016-20021.yml

Spotted a mistake? Edit the file on GitLab.

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