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CVE-2020-14367

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 its 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.

Risk Information

Base Score
6.0
MODERATE
Vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H
EPSS Score
Exploitation Probability
0.27

Associated Vulnerability

VulnerabilityOS Platform
An implementation of the Network Time Protocol (USN-4475-1) chrony_3.2-4ubuntu4.5_i386.debLinux
An implementation of the Network Time Protocol (USN-4475-1) chrony_3.2-4ubuntu4.5_amd64.debLinux
An implementation of the Network Time Protocol (USN-4475-1) chrony_3.5-6ubuntu6.2_amd64.debLinux
SUSE-SU-2021:4147-1(SUSE Linux Enterprise Server 12-SP5 ) chrony-4.1-5.9.1.x86_64.rpmLinux
SUSE-SU-2021:4147-1(SUSE Linux Enterprise Server 12-SP5 ) chrony-debuginfo-4.1-5.9.1.x86_64.rpmLinux
SUSE-SU-2021:4147-1(SUSE Linux Enterprise Server 12-SP5 ) chrony-debugsource-4.1-5.9.1.x86_64.rpmLinux
SUSE-SU-2023:4614-1(SUSE Linux Enterprise Server 12 SP5 ) java-1_8_0-ibm-1.8.0_sr8.15-30.117.1.x86_64.rpmLinux
SUSE-SU-2023:4614-1(SUSE Linux Enterprise Server 12 SP5 ) java-1_8_0-ibm-alsa-1.8.0_sr8.15-30.117.1.x86_64.rpmLinux
SUSE-SU-2023:4614-1(SUSE Linux Enterprise Server 12 SP5 ) java-1_8_0-ibm-devel-1.8.0_sr8.15-30.117.1.x86_64.rpmLinux
SUSE-SU-2023:4614-1(SUSE Linux Enterprise Server 12 SP5 ) java-1_8_0-ibm-plugin-1.8.0_sr8.15-30.117.1.x86_64.rpmLinux
chrony Security Update (ALAS-2021-1575) chrony-3.5.1-1.amzn2.0.1.x86_64.rpmLinux

Patch Details

No records found

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234