CVE-2020-14367

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.

• CWE-59
• CWE-59

• https://bugzilla.redhat.com/show_bug.cgi?id=1870298Issue Tracking, Patch, Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6WKABKNLCSC3MACCWU6OM2YGWVWFWFMU/
• https://security.gentoo.org/glsa/202008-23Third Party Advisory
• https://usn.ubuntu.com/4475-1/Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=1870298Issue Tracking, Patch, Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6WKABKNLCSC3MACCWU6OM2YGWVWFWFMU/
• https://security.gentoo.org/glsa/202008-23Third Party Advisory
• https://usn.ubuntu.com/4475-1/Third Party Advisory

Published

Aug 24, 2020

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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