Rule ID
SV-45308r1_rule
Version
V1R12
CCIs
If the system is not configured to audit certain activities and write them to an audit log, it is more difficult to detect and track system compromises and damages incurred during a system compromise.
Determine if execution of the usermod and groupmod executable are audited. # auditctl -l | egrep '(usermod|groupmod)' If either usermod or groupmod are not listed with a permissions filter of at least 'x', this is a finding. Determine if /etc/passwd, /etc/shadow, /etc/group, and /etc/gshadow are audited for writing. # auditctl -l | egrep '(/etc/passwd|/etc/shadow|/etc/group|/etc/gshadow)' If any of these are not listed with a permissions filter of at least 'w', this is a finding.
Configure execute auditing of the usermod and groupmod executables. Add the following to the audit.rules file:
-w /usr/sbin/usermod -p x -k usermod
-w /usr/sbin/groupmod -p x -k groupmod
Configure append auditing of the passwd, shadow, group, and gshadow files. Add the following to the audit.rules file:
-w /etc/passwd -p w -k passwd
-w /etc/shadow -p w -k shadow
-w /etc/group -p w -k group
-w /etc/gshadow -p w -k gshadow
Restart the auditd service.
# rcauditd restart
OR
# service auditd restart