UBUNTU-CVE-2020-14367

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Source
https://ubuntu.com/security/CVE-2020-14367
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-14367.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2020-14367
Related
Published
2020-08-24T15:15:00Z
Modified
2024-10-15T14:07:30Z
Severity
  • 6.0 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H CVSS Calculator
Summary
[none]
Details

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

Affected packages

Ubuntu:Pro:14.04:LTS / chrony

Package

Name
chrony
Purl
pkg:deb/ubuntu/chrony?arch=src?distro=trusty/esm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.26-4
1.29-1
1.29-1ubuntu0.1
1.29-1ubuntu0.1+esm1

Ecosystem specific 

{
    "ubuntu_priority": "medium"
}

Ubuntu:Pro:16.04:LTS / chrony

Package

Name
chrony
Purl
pkg:deb/ubuntu/chrony?arch=src?distro=esm-apps/xenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*

1.30-2
1.31.1-2

2.*

2.1.1-1
2.1.1-1ubuntu0.1

Ecosystem specific 

{
    "ubuntu_priority": "medium"
}

Ubuntu:18.04:LTS / chrony

Package

Name
chrony
Purl
pkg:deb/ubuntu/chrony?arch=src?distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.2-4ubuntu4.5

Affected versions

3.*

3.1-5
3.2-1build1
3.2-1ubuntu3
3.2-2
3.2-2ubuntu2
3.2-2ubuntu3
3.2-4ubuntu1
3.2-4ubuntu2
3.2-4ubuntu3
3.2-4ubuntu4
3.2-4ubuntu4.1
3.2-4ubuntu4.2
3.2-4ubuntu4.4

Ecosystem specific 

{
    "availability": "No subscription required",
    "ubuntu_priority": "medium",
    "binaries": [
        {
            "binary_version": "3.2-4ubuntu4.5",
            "binary_name": "chrony"
        },
        {
            "binary_version": "3.2-4ubuntu4.5",
            "binary_name": "chrony-dbgsym"
        }
    ]
}

Ubuntu:20.04:LTS / chrony

Package

Name
chrony
Purl
pkg:deb/ubuntu/chrony?arch=src?distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.5-6ubuntu6.2

Affected versions

3.*

3.5-2ubuntu2
3.5-2ubuntu3
3.5-4ubuntu2
3.5-5ubuntu1
3.5-6ubuntu1
3.5-6ubuntu2
3.5-6ubuntu3
3.5-6ubuntu5
3.5-6ubuntu6
3.5-6ubuntu6.1

Ecosystem specific 

{
    "availability": "No subscription required",
    "ubuntu_priority": "medium",
    "binaries": [
        {
            "binary_version": "3.5-6ubuntu6.2",
            "binary_name": "chrony"
        },
        {
            "binary_version": "3.5-6ubuntu6.2",
            "binary_name": "chrony-dbgsym"
        }
    ]
}