STIGQter: STIG Summary: SLES 12 Security Technical Implementation Guide Version: 2 Release: 3 Benchmark Date: 23 Apr 2021:

The SUSE operating system clock must, for networked systems, be synchronized to an authoritative DoD time source at least every 24 hours.

DISA Rule

SV-217281r646755_rule

Vulnerability Number

V-217281

Group Title

SRG-OS-000355-GPOS-00143

Rule Version

SLES-12-030300

Severity

CAT II

CCI(s)

• CCI-002046 - The information system synchronizes the internal system clocks to the authoritative time source when the time difference is greater than the organization-defined time period.
• CCI-001891 - The information system compares internal information system clocks on an organization-defined frequency with an organization-defined authoritative time source.

Weight

10

Fix Recommendation

Configure the SUSE operating system clock must be configured to synchronize to an authoritative DoD time source when the time difference is greater than one second.

To configure the system clock to synchronize to an authoritative DoD time source at least every 24 hours, edit the file "/etc/ntp.conf". Add or correct the following lines by replacing "[time_source]" with an authoritative DoD time source:

server [time_source] maxpoll 16

Check Contents

Verify the SUSE operating system clock must be configured to synchronize to an authoritative DoD time source when the time difference is greater than one second.

Check that the SUSE operating system clock must be configured to synchronize to an authoritative DoD time source when the time difference is greater than one second with the following command:

> sudo grep maxpoll /etc/ntp.conf

server 0.us.pool.ntp.mil maxpoll 16

If nothing is returned or "maxpoll" is greater than "16", or is commented out, this is a finding.

Verify the "ntp.conf" file is configured to an authoritative DoD time source by running the following command:

> sudo grep -i server /etc/ntp.conf
server 0.us.pool.ntp.mil

If the parameter "server" is not set or is not set to an authoritative DoD time source, this is a finding.

Vulnerability Number

V-217281

Documentable

False

Rule Version

SLES-12-030300

Severity Override Guidance

Verify the SUSE operating system clock must be configured to synchronize to an authoritative DoD time source when the time difference is greater than one second.

Check that the SUSE operating system clock must be configured to synchronize to an authoritative DoD time source when the time difference is greater than one second with the following command:

> sudo grep maxpoll /etc/ntp.conf

server 0.us.pool.ntp.mil maxpoll 16

If nothing is returned or "maxpoll" is greater than "16", or is commented out, this is a finding.

Verify the "ntp.conf" file is configured to an authoritative DoD time source by running the following command:

> sudo grep -i server /etc/ntp.conf
server 0.us.pool.ntp.mil

If the parameter "server" is not set or is not set to an authoritative DoD time source, this is a finding.

Check Content Reference

M

Target Key

4033

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