RHEL-07-020040 - The Red Hat Enterprise Linux operating system must be configured so that designated personnel are notified if baseline configurations are changed in an unauthorized manner.

Information

Unauthorized changes to the baseline configuration could make the system vulnerable to various attacks or allow unauthorized access to the operating system. Changes to operating system configurations can have unintended side effects, some of which may be relevant to security.

Detecting such changes and providing an automated response can help avoid unintended, negative consequences that could ultimately affect the security state of the operating system. The operating system's Information System Security Manager (ISSM)/Information System Security Officer (ISSO) and System Administrators (SAs) must be notified via email and/or monitoring system trap when there is an unauthorized modification of a configuration item.

Solution

Configure the operating system to notify designated personnel if baseline configurations are changed in an unauthorized manner. The AIDE tool can be configured to email designated personnel with the use of the cron system.

The following example output is generic. It will set cron to run AIDE daily and to send email at the completion of the analysis.

# more /etc/cron.daily/aide

/usr/sbin/aide --check | /bin/mail -s '$HOSTNAME - Daily AIDE integrity check run' root@example_server_name.mil

Note: Per requirement RHEL-07-020028, the 'mailx' package must be installed on the system to enable email functionality.

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_RHEL_7_V3R15_STIG.zip

Item Details

Category: CONFIGURATION MANAGEMENT

References: 800-53|CM-3(5), CAT|II, CCI|CCI-001744, Rule-ID|SV-204446r958794_rule, STIG-ID|RHEL-07-020040, STIG-Legacy|SV-86599, STIG-Legacy|V-71975, Vuln-ID|V-204446

Plugin: Unix

Control ID: 736f71d29f02236e5d5785814e8565e3a6f2d343235538b561bba0acca301ef9