Home / mailings [gentoo-announce] [ GLSA 202008-23 ] chrony: Symlink vulnerability
Posted on 30 August 2020
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Gentoo Linux Security Advisory GLSA 202008-23
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https://security.gentoo.org/
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Severity: Normal
Title: chrony: Symlink vulnerability
Date: August 30, 2020
Bugs: #738154
ID: 202008-23
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Synopsis
========
A vulnerability in chrony may allow a privileged attacker to cause data
loss via a symlink.
Background
==========
chrony is a versatile implementation of the Network Time Protocol
(NTP).
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-misc/chrony < 3.5.1 >= 3.5.1
Description
===========
It was found that chrony did not check whether its PID file was a
symlink.
Impact
======
A local attacker could perform symlink attack(s) to overwrite arbitrary
files with root privileges.
Workaround
==========
There is no known workaround at this time.
Resolution
==========
All chrony users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/chrony-3.5.1"
References
==========
[ 1 ] CVE-2020-14367
https://nvd.nist.gov/vuln/detail/CVE-2020-14367
[ 2 ] chrony-3.5.1 release announcement
=https://listengine.tuxfamily.org/chrony.tuxfamily.org/chrony-announce/2020=/08/msg00000.html
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
https://security.gentoo.org/glsa/202008-23
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 2020 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
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