CIS Ubuntu 14.04 LTS - 2.2.1.3 Ensure chrony is configured

DevOps & Security

Verify that chrony is properly configured with remote time server

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Source SKILL.md: https://github.com/CyberStrikeus/CyberStrike/blob/HEAD/.cyberstrike/skill/CIS_benchmarks/Operating_Systems/Ubuntu/CIS_Ubuntu_Linux_14.04_LTS_Benchmark_v2.1.0/cis-ubuntu1404-v210-2-2-1-3/SKILL.md

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2.2.1.3 Ensure chrony is configured (Scored)

Profile Applicability

Level 1 - Server
Level 1 - Workstation

Description

chrony is a daemon which implements the Network Time Protocol (NTP) is designed to synchronize system clocks across a variety of systems and use a source that is highly accurate. More information on chrony can be found at http://chrony.tuxfamily.org/. chrony can be configured to be a client and/or a server.

This recommendation only applies if chrony is in use on the system.

Rationale

If chrony is in use on the system proper configuration is vital to ensuring time synchronization is working properly.

Audit Procedure

Run the following command and verify remote server is configured properly:

grep "^(server|pool)" /etc/chrony/chrony.conf

Expected output:

server <remote-server>

Multiple servers may be configured.

Expected Result

At least one remote server or pool should be configured in /etc/chrony/chrony.conf.

Remediation

Add or edit server or pool lines to /etc/chrony/chrony.conf as appropriate:

server <remote-server>

Default Value

chrony server settings are not configured by default.

References

http://chrony.tuxfamily.org/
CIS Controls: 6.1 Use At Least Two Synchronized Time Sources For All Servers And Network Equipment

Profile

Level 1 - Server
Level 1 - Workstation