Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Tuxfamily | Chrony | < 3.5.1 |
| Fedoraproject | Fedora | 32 |
| Canonical | Ubuntu Linux | 18.04 |
Related Weaknesses (CWE)
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1870298Issue TrackingPatchVendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- 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 TrackingPatchVendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.gentoo.org/glsa/202008-23Third Party Advisory
- https://usn.ubuntu.com/4475-1/Third Party Advisory
FAQ
What is CVE-2020-14367?
CVE-2020-14367 is a vulnerability with a CVSS score of 6.0 (MEDIUM). 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 ...
How severe is CVE-2020-14367?
CVE-2020-14367 has been rated MEDIUM with a CVSS base score of 6.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-14367?
Check the references section above for vendor advisories and patch information. Affected products include: Tuxfamily Chrony, Fedoraproject Fedora, Canonical Ubuntu Linux.