Ubuntu 22.04 LTS must generate audit records for successful/unsuccessful uses of the umount command.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-260625	SRG-OS-000064-GPOS-00033	UBTU-22-654115	SV-260625r958446_rule	2025-03-03	2

Description
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. Audit records can be generated from various components within the information system (e.g., module or policy filter).

ℹ️ Check
Verify if Ubuntu 22.04 LTS generates audit records upon successful/unsuccessful attempts to use the "umount" command by using the following command: $ sudo auditctl -l \| grep /usr/bin/umount -a always,exit -S all -F path=/usr/bin/umount -F perm=x -F auid>=1000 -F auid!=-1 -F key=privileged-umount If the command does not return lines that match the example or the lines are commented out, this is a finding. Note: The "key=" value is arbitrary and can be different from the example output above.

ℹ️ Check

Verify if Ubuntu 22.04 LTS generates audit records upon successful/unsuccessful attempts to use the "umount" command by using the following command: $ sudo auditctl -l | grep /usr/bin/umount -a always,exit -S all -F path=/usr/bin/umount -F perm=x -F auid>=1000 -F auid!=-1 -F key=privileged-umount If the command does not return lines that match the example or the lines are commented out, this is a finding. Note: The "key=" value is arbitrary and can be different from the example output above.

✔️ Fix
Configure the audit system to generate an audit event for any successful/unsuccessful use of the "umount" command. Add or modify the following line in the "/etc/audit/rules.d/stig.rules" file: -a always,exit -F path=/usr/bin/umount -F perm=x -F auid>=1000 -F auid!=unset -k privileged-umount To reload the rules file, issue the following command: $ sudo augenrules --load Note: The "-k <keyname>" at the end of the line gives the rule a unique meaning to help during an audit investigation. The <keyname> does not need to match the example above.

✔️ Fix

Configure the audit system to generate an audit event for any successful/unsuccessful use of the "umount" command. Add or modify the following line in the "/etc/audit/rules.d/stig.rules" file: -a always,exit -F path=/usr/bin/umount -F perm=x -F auid>=1000 -F auid!=unset -k privileged-umount To reload the rules file, issue the following command: $ sudo augenrules --load Note: The "-k <keyname>" at the end of the line gives the rule a unique meaning to help during an audit investigation. The <keyname> does not need to match the example above.