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.
                
            Metrics
Affected Vendors & Products
Advisories
    | Source | ID | Title | 
|---|---|---|
  EUVD | 
                EUVD-2020-6508 | 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. | 
  Ubuntu USN | 
                USN-4475-1 | Chrony vulnerability | 
Fixes
    Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
        History
                    Sun, 13 Jul 2025 13:45:00 +0000
| Type | Values Removed | Values Added | 
|---|---|---|
| Metrics | 
        
        
        epss
         
  | 
    
        
        
        epss
         
  | 
Status: PUBLISHED
Assigner: redhat
Published:
Updated: 2024-08-04T12:46:33.289Z
Reserved: 2020-06-17T00:00:00
Link: CVE-2020-14367
No data.
Status : Modified
Published: 2020-08-24T15:15:13.147
Modified: 2024-11-21T05:03:06.350
Link: CVE-2020-14367
                        OpenCVE Enrichment
                    No data.
 EUVD
 Ubuntu USN