The Red Hat Enterprise Linux operating system must take appropriate action when the remote logging buffer is full.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-204507	RHEL-07-030210	SV-204507r603261_rule		Medium

Description
Information stored in one location is vulnerable to accidental or incidental deletion or alteration. Off-loading is a common process in information systems with limited audit storage capacity. One method of off-loading audit logs in Red Hat Enterprise Linux is with the use of the audisp-remote dameon. When the remote buffer is full, audit logs will not be collected and sent to the central log server. Satisfies: SRG-OS-000342-GPOS-00133, SRG-OS-000479-GPOS-00224

Description

Information stored in one location is vulnerable to accidental or incidental deletion or alteration. Off-loading is a common process in information systems with limited audit storage capacity. One method of off-loading audit logs in Red Hat Enterprise Linux is with the use of the audisp-remote dameon. When the remote buffer is full, audit logs will not be collected and sent to the central log server. Satisfies: SRG-OS-000342-GPOS-00133, SRG-OS-000479-GPOS-00224

STIG	Date
Red Hat Enterprise Linux 7 Security Technical Implementation Guide	2020-12-08

Details

Check Text ( C-36349r602645_chk )
Verify the audisp daemon is configured to take an appropriate action when the internal queue is full: # grep "overflow_action" /etc/audisp/audispd.conf overflow_action = syslog If the "overflow_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 what action that system takes when the internal queue is full. If there is no evidence 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 internal queue is full, this is a finding.

Check Text ( C-36349r602645_chk )

Verify the audisp daemon is configured to take an appropriate action when the internal queue is full:

# grep "overflow_action" /etc/audisp/audispd.conf

overflow_action = syslog

If the "overflow_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 what action that system takes when the internal queue is full.

If there is no evidence 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 internal queue is full, this is a finding.

Fix Text (F-36312r602646_fix)
Edit the /etc/audisp/audispd.conf file and add or update the "overflow_action" option: overflow_action = syslog The audit daemon must be restarted for changes to take effect: # service auditd restart