SLEM 5 must generate audit records for all uses of the "mount" system call.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-261458	SRG-OS-000037-GPOS-00015	SLEM-05-654175	SV-261458r996781_rule	2024-06-04	1

Description
Reconstruction of harmful events or forensic analysis is not possible if audit records do not contain enough information. At a minimum, the organization must audit the full-text recording of privileged commands. The organization must maintain audit trails in sufficient detail to reconstruct events to determine the cause and impact of compromise.

ℹ️ Check
Verify SLEM 5 generates an audit record for all uses of the "mount" system call with the following command: > sudo auditctl -l \| grep -w 'mount' -a always,exit -F arch=b32 -S mount -F auid>=1000 -F auid!=-1 -F key=privileged-mount -a always,exit -F arch=b64 -S mount -F auid>=1000 -F auid!=-1 -F key=privileged-mount If both the "b32" and "b64" audit rules are not defined for the "mount" syscall, this is a finding. Note: The "key=" value is arbitrary and can be different from the example output above.

ℹ️ Check

Verify SLEM 5 generates an audit record for all uses of the "mount" system call with the following command: > sudo auditctl -l | grep -w 'mount' -a always,exit -F arch=b32 -S mount -F auid>=1000 -F auid!=-1 -F key=privileged-mount -a always,exit -F arch=b64 -S mount -F auid>=1000 -F auid!=-1 -F key=privileged-mount If both the "b32" and "b64" audit rules are not defined for the "mount" syscall, this is a finding. Note: The "key=" value is arbitrary and can be different from the example output above.

✔️ Fix
Configure SLEM 5 to generate an audit record for all uses of the "mount" system call. Add or modify the following lines in the "/etc/audit/rules.d/audit.rules" file: -a always,exit -F arch=b32 -S mount -F auid>=1000 -F auid!=unset -k privileged-mount -a always,exit -F arch=b64 -S mount -F auid>=1000 -F auid!=unset -k privileged-mount To reload the rules file, restart the audit daemon: > sudo systemctl restart auditd.service or issue the following command: > sudo augenrules --load

✔️ Fix

Configure SLEM 5 to generate an audit record for all uses of the "mount" system call. Add or modify the following lines in the "/etc/audit/rules.d/audit.rules" file: -a always,exit -F arch=b32 -S mount -F auid>=1000 -F auid!=unset -k privileged-mount -a always,exit -F arch=b64 -S mount -F auid>=1000 -F auid!=unset -k privileged-mount To reload the rules file, restart the audit daemon: > sudo systemctl restart auditd.service or issue the following command: > sudo augenrules --load