TOSS must take appropriate action when the internal event queue is full.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-253089	TOSS-04-040390	SV-253089r826065_rule		Medium

Description
Information stored in one location is vulnerable to accidental or incidental deletion or alteration. Offloading is a common process in information systems with limited audit storage capacity. TOSS installation media provides "rsyslogd." "rsyslogd" is a system utility providing support for message logging. Support for both internet and UNIX domain sockets enables this utility to support both local and remote logging. Couple this utility with "gnutls" (which is a secure communications library implementing the SSL, TLS, and DTLS protocols), and now there is a method to securely encrypt and offload auditing.

Description

Information stored in one location is vulnerable to accidental or incidental deletion or alteration. Offloading is a common process in information systems with limited audit storage capacity. TOSS installation media provides "rsyslogd." "rsyslogd" is a system utility providing support for message logging. Support for both internet and UNIX domain sockets enables this utility to support both local and remote logging. Couple this utility with "gnutls" (which is a secure communications library implementing the SSL, TLS, and DTLS protocols), and now there is a method to securely encrypt and offload auditing.

STIG	Date
Tri-Lab Operating System Stack (TOSS) 4 Security Technical Implementation Guide	2022-08-29

Details

Check Text ( C-56542r826064_chk )
Verify the audit system is configured to take an appropriate action when the internal event queue is full: $ sudo grep -i overflow_action /etc/audit/auditd.conf overflow_action = syslog If the value of the "overflow_action" option is not set to "syslog", "single", "halt", or the line is commented out, ask the System Administrator to indicate how the audit logs are offloaded to a different system or media. If there is no evidence that the transfer of the audit logs being offloaded to another system or media takes appropriate action if the internal event queue becomes full, this is a finding.

Check Text ( C-56542r826064_chk )

Verify the audit system is configured to take an appropriate action when the internal event queue is full:

$ sudo grep -i overflow_action /etc/audit/auditd.conf

overflow_action = syslog

If the value of the "overflow_action" option is not set to "syslog", "single", "halt", or the line is commented out, ask the System Administrator to indicate how the audit logs are offloaded to a different system or media.

If there is no evidence that the transfer of the audit logs being offloaded to another system or media takes appropriate action if the internal event queue becomes full, this is a finding.

Fix Text (F-56492r824938_fix)
Edit the /etc/audit/auditd.conf file and add or update the "overflow_action" option to one of "syslog", "single", or "halt": overflow_action = syslog The audit daemon must be restarted for changes to take effect.