CVEvulnerability

CVE-2020-14367

6.0 MEDIUM Published 2020-08-24 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2020-08-24
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
6.0 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
CVSS 2.0 ([email protected])
3.6 LOW — AV:L/AC:L/Au:N/C:N/I:P/A:P
Weaknesses
CWE-59

Description

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.

Affected configurations

• tuxfamily chrony (< 3.5.1) • fedoraproject fedora 32 • canonical ubuntu linux 18.04 • canonical ubuntu linux 20.04

Related

Weakness · CWE (1)

  • CWE-59 Improper Link Resolution Before File Access weakness

References