The SUSE operating system must notify the System Administrator (SA) when AIDE discovers anomalies in the operation of any security functions.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-77153	SLES-12-010510	SV-91849r2_rule		Medium

Description
If anomalies are not acted on, security functions may fail to secure the system. Security function is defined as the hardware, software, and/or firmware of the information system responsible for enforcing the system security policy and supporting the isolation of code and data on which the protection is based. Security functionality includes, but is not limited to, establishing system accounts, configuring access authorizations (i.e., permissions, privileges), setting events to be audited, and setting intrusion detection parameters. Notifications provided by information systems include messages to local computer consoles and/or hardware indications, such as lights. This capability must take into account operational requirements for availability for selecting an appropriate response. The organization may choose to shut down or restart the information system upon security function anomaly detection.

Description

If anomalies are not acted on, security functions may fail to secure the system. Security function is defined as the hardware, software, and/or firmware of the information system responsible for enforcing the system security policy and supporting the isolation of code and data on which the protection is based. Security functionality includes, but is not limited to, establishing system accounts, configuring access authorizations (i.e., permissions, privileges), setting events to be audited, and setting intrusion detection parameters. Notifications provided by information systems include messages to local computer consoles and/or hardware indications, such as lights. This capability must take into account operational requirements for availability for selecting an appropriate response. The organization may choose to shut down or restart the information system upon security function anomaly detection.

STIG	Date
SLES 12 Security Technical Implementation Guide	2019-03-12

Details

Check Text ( C-76763r2_chk )
Verify the SUSE operating system notifies the SA when AIDE discovers anomalies in the operation of any security functions. Check to see if the aide cron job sends an email when executed with the following command: # sudo grep -i "aide" /etc/cron./aide 0 0 * * /usr/sbin/aide --check \| /bin/mail -s "aide integrity check run for " root@notareal.email If the "aide" file does not exist under the "/etc/cron" directory structure or the cron job is not configured to execute a binary to send an email (such as "/usr/bin/mail"), this is a finding.

Check Text ( C-76763r2_chk )

Verify the SUSE operating system notifies the SA when AIDE discovers anomalies in the operation of any security functions.

Check to see if the aide cron job sends an email when executed with the following command:

# sudo grep -i "aide" /etc/cron.*/aide
0 0 * * * /usr/sbin/aide --check | /bin/mail -s "aide integrity check run for " root@notareal.email

If the "aide" file does not exist under the "/etc/cron" directory structure or the cron job is not configured to execute a binary to send an email (such as "/usr/bin/mail"), this is a finding.

Fix Text (F-83849r2_fix)
Configure the SUSE operating system to notify the SA when AIDE discovers anomalies in the operation of any security functions. Create the aide crontab file in "/etc/cron.daily" and add following command replacing the "[E-MAIL]" parameter with a proper email address for the SA: 0 0 * * * /usr/sbin/aide --check \| /bin/mail -s "aide integrity check run for " root@notareal.email