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Gentoo Linux Security Advisory                           GLSA 202409-01
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: Portage: Unverified PGP Signatures
     Date: September 22, 2024
     Bugs: #905356
       ID: 202409-01

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Synopsis
========

A vulnerability has been discovered in Portage, where PGP signatures
would not be verified.

Background
==========

Portage is the default Gentoo package management system.

Affected packages
=================

Package           Vulnerable    Unaffected
----------------  ------------  ------------
sys-apps/portage  < 3.0.47      >= 3.0.47

Description
===========

Multiple vulnerabilities have been discovered in Portage. Please review
the CVE identifiers referenced below for details.

Impact
======

When using the webrsync mechanism to sync the tree the PGP signatures
that protect the integrity of the data in the tree would not be
verified. This would allow a man-in-the-middle attack to inject
arbitrary content into the tree.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Portage users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=sys-apps/portage-3.0.47"

References
==========

[ 1 ] CVE-2016-20021
      https://nvd.nist.gov/vuln/detail/CVE-2016-20021

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

 https://security.gentoo.org/glsa/202409-01

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users' machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
https://bugs.gentoo.org.

License
=======

Copyright 2024 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

https://creativecommons.org/licenses/by-sa/2.5