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Gentoo Linux Security Advisory                           GLSA 202507-05
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: NTP: Multiple Vulnerabilities
     Date: July 08, 2025
     Bugs: #904337
       ID: 202507-05

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Synopsis
========

Multiple vulnerabilities have been discovered in NTP, the worst of which
could lead to the execution of arbitrary code.

Background
==========

NTP contains software for the Network Time Protocol.

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

Package       Vulnerable    Unaffected
------------  ------------  ------------
net-misc/ntp  < 4.2.8_p16   >= 4.2.8_p16

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

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

Impact
======

The first four of these CVEs affect a function in libntp that is only
used by ntpq, but not by ntpd.

The last CVE affects the driver for a hardware clock (GPS receiver), so
ntpd might be vulnerable to manipulated devices of that type, but not to
remote attacks.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All NTP users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=net-misc/ntp-4.2.8_p16"

References
==========

[ 1 ] CVE-2023-26551
      https://nvd.nist.gov/vuln/detail/CVE-2023-26551
[ 2 ] CVE-2023-26552
      https://nvd.nist.gov/vuln/detail/CVE-2023-26552
[ 3 ] CVE-2023-26553
      https://nvd.nist.gov/vuln/detail/CVE-2023-26553
[ 4 ] CVE-2023-26554
      https://nvd.nist.gov/vuln/detail/CVE-2023-26554
[ 5 ] CVE-2023-26555
      https://nvd.nist.gov/vuln/detail/CVE-2023-26555

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

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

 https://security.gentoo.org/glsa/202507-05

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 2025 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