GLSA 202008-23: chrony: Symlink vulnerability

http://security.gentoo.org/

Severity:	normal
Title:	chrony: Symlink vulnerability
Date:	08/30/2020
Bugs:	#738154
ID:	202008-23

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	Architecture(s)
net-misc/chrony	< 3.5.1	>= 3.5.1	All supported architectures

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

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-202008-23.xml

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.