From Canonical Ubuntu 16.04 Security Technical Implementation Guide
Part of SRG-OS-000037-GPOS-00015
Associated with: CCI-000130 CCI-000135 CCI-000169 CCI-000172 CCI-002884
Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one.
Verify that an audit event is generated for any successful/unsuccessful use of the "chage" command. Check for the following system call being audited by performing the following command to check the file system rules in "/etc/audit/audit.rules": # sudo grep -w chage /etc/audit/audit.rules -a always,exit -F arch=b32 path=/usr/bin/chage -F perm=x -F auid>=1000 -F auid!=4294967295 -k privileged-chage -a always,exit -F arch=b64 path=/usr/bin/chage -F perm=x -F auid>=1000 -F auid!=4294967295 -k privileged-chage If the command does not return a line, or the line is commented out, this is a finding.
Configure the audit system to generate an audit event for any successful/unsuccessful uses of the "chage" command. Add or update the following rules in the "/etc/audit/audit.rules" file: -a always,exit -F arch=b32 path=/usr/bin/chage -F perm=x -F auid>=1000 -F auid!=4294967295 -k privileged-chage -a always,exit -F arch=b64 path=/usr/bin/chage -F perm=x -F auid>=1000 -F auid!=4294967295 -k privileged-chage The audit daemon must be restarted for the changes to take effect. To restart the audit daemon, run the following command: # sudo systemctl restart auditd.service
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