Title

The Red Hat Enterprise Linux operating system must be configured so that the audit system takes appropriate action when the audit storage volume is full. (Cat II impact)

Discussion

Taking appropriate action in case of a filled audit storage volume will minimize the possibility of losing audit records. One method of off-loading audit logs in Red Hat Enterprise Linux is with the use of the audisp-remote dameon.

Check Content

Verify the action the operating system takes if the disk the audit records are written to becomes full. To determine the action that takes place if the disk is full on the remote server, use the following command: # grep -i disk_full_action /etc/audisp/audisp-remote.conf disk_full_action = single If the value of the "disk_full_action" option is not "syslog", "single", or "halt", or the line is commented out, ask the System Administrator to indicate how the audit logs are off-loaded to a different system or storage media, and to indicate the action taken when the disk is full on the remote server. If there is no evidence that the system is configured to off-load audit logs to a different system or storage media, or if the configuration does not take appropriate action when the disk is full on the remote server, this is a finding.

Fix Text

Configure the action the operating system takes if the disk the audit records are written to becomes full. Uncomment or edit the "disk_full_action" option in "/etc/audisp/audisp-remote.conf" and set it to "syslog", "single", or "halt", such as the following line: disk_full_action = single

Additional Identifiers

Rule ID: SV-204511r877390_rule

Vulnerability ID: V-204511

Group Title: SRG-OS-000342-GPOS-00133

Expert Comments

CCIs tied to check.

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