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Gentoo: GLSA-202008-23 Advisory: chrony Symlink Vulnerability Warning

gentoo
Calendar Grey August 30, 2020
Dist Gentoo Esm H88
A symlink vulnerability in Chrony on Gentoo Linux could let attackers overwrite or delete files. Users should upgrade to version 4.0-r4 or higher to mitigate risks
A vulnerability in chrony may allow a privileged attacker to cause data loss via a symlink.

Summary

It was found that chrony did not check whether its PID file was a symlink.

Topics%20covered

Topics Covered

security advisory gentoo data loss symlink network time protocol

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
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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.

Severity: Normal
Title: chrony: Symlink vulnerability
Date: August 30, 2020
Bugs: #738154
ID: 202008-23

Topics%20covered

Topics Covered

security advisory gentoo data loss symlink network time protocol

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).

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Affected Packages

------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-misc/chrony < 3.5.1 >= 3.5.1

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.

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