Link Following The advisory has been revoked - it doesn't affect any version of package chrony (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU1604-CHRONY-1144280
- published19 Aug 2025
- disclosed24 Aug 2020
Introduced: 24 Aug 2020
CVE-2020-14367 (opens in a new tab)Amendment
The Ubuntu security team deemed this advisory irrelevant for Ubuntu:16.04.
NVD Description
Note: Versions mentioned in the description apply only to the upstream chrony package and not the chrony package as distributed by Ubuntu.
A flaw was found in chrony versions before 3.5.1 when creating the PID file under the /var/run/chrony folder. The file is created during chronyd startup while still running as the root user, and when it's opened for writing, chronyd does not check for an existing symbolic link with the same file name. This flaw allows an attacker with privileged access to create a symlink with the default PID file name pointing to any destination file in the system, resulting in data loss and a denial of service due to the path traversal.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2020-14367
- https://security-tracker.debian.org/tracker/CVE-2020-14367
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6WKABKNLCSC3MACCWU6OM2YGWVWFWFMU/
- https://security.gentoo.org/glsa/202008-23
- https://bugzilla.redhat.com/show_bug.cgi?id=1870298
- https://usn.ubuntu.com/4475-1/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6WKABKNLCSC3MACCWU6OM2YGWVWFWFMU/