STIGQter: STIG Summary: Canonical Ubuntu 18.04 LTS Security Technical Implementation Guide Version: 2 Release: 3 Benchmark Date: 23 Apr 2021:

The Ubuntu operating system audit event multiplexor must be configured to off-load audit logs onto a different system in real time, if the system is interconnected.

DISA Rule

SV-219153r610963_rule

Vulnerability Number

V-219153

Group Title

SRG-OS-000479-GPOS-00224

Rule Version

UBTU-18-010007

Severity

CAT III

CCI(s)

• CCI-001851 - The information system off-loads audit records per organization-defined frequency onto a different system or media than the system being audited.

Weight

10

Fix Recommendation

Configure the audit event multiplexor to off-load audit records to a different system or storage media from the system being audited.

Install the audisp-remote plugin:

# sudo apt-get install audispd-plugins -y

Set the audisp-remote plugin as active, by editing the /etc/audisp/plugins.d/au-remote.conf file:

# sudo sed -i -E 's/active\s*=\s*no/active = yes/' /etc/audisp/plugins.d/au-remote.conf

Set the address of the remote machine, by editing the /etc/audisp/audisp-remote.conf file:

# sudo sed -i -E 's/(remote_server\s*=).*/\1 <remote addr>/' audisp-remote.conf

where <remote addr> must be substituted by the address of the remote server receiving the audit log.

Make the audit service reload its configuration files:

# sudo systemctl restart auditd.service

Check Contents

Verify the audit event multiplexor is configured to off-load audit records to a different system or storage media from the system being audited.

Check that audisp-remote plugin is installed:

# sudo dpkg -s audispd-plugins

If status is "not installed", this is a finding.

Check that the records are being off-loaded to a remote server with the following command:

# sudo grep -i active /etc/audisp/plugins.d/au-remote.conf

active = yes

If "active" is not set to "yes", or the line is commented out, this is a finding.

Check that audisp-remote plugin is configured to send audit logs to a different system:

# sudo grep -i ^remote_server /etc/audisp/audisp-remote.conf

remote_server = 192.168.122.126

If the remote_server parameter is not set or is set with a local address, or is set with invalid address, this is a finding.

Vulnerability Number

V-219153

Documentable

False

Rule Version

UBTU-18-010007

Severity Override Guidance

Verify the audit event multiplexor is configured to off-load audit records to a different system or storage media from the system being audited.

Check that audisp-remote plugin is installed:

# sudo dpkg -s audispd-plugins

If status is "not installed", this is a finding.

Check that the records are being off-loaded to a remote server with the following command:

# sudo grep -i active /etc/audisp/plugins.d/au-remote.conf

active = yes

If "active" is not set to "yes", or the line is commented out, this is a finding.

Check that audisp-remote plugin is configured to send audit logs to a different system:

# sudo grep -i ^remote_server /etc/audisp/audisp-remote.conf

remote_server = 192.168.122.126

If the remote_server parameter is not set or is set with a local address, or is set with invalid address, this is a finding.

Check Content Reference

M

Target Key

4055

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