The Red Hat Enterprise Linux operating system must audit all uses of the umount command.

From Red Hat Enterprise Linux 7 Security Technical Implementation Guide

SV-86797r5_rule The Red Hat Enterprise Linux operating system must audit all uses of the umount command.

Vulnerability discussion

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 mount commands. The organization must maintain audit trails in sufficient detail to reconstruct events to determine the cause and impact of compromise.Satisfies: SRG-OS-000042-GPOS-00020, SRG-OS-000392-GPOS-00172

Check content

Verify the operating system generates audit records when successful/unsuccessful attempts to use the "umount" command occur. Check that the following system call is being audited by performing the following series of commands to check the file system rules in "/etc/audit/audit.rules": # grep -iw "/usr/bin/umount" /etc/audit/audit.rules -a always,exit -F path=/usr/bin/umount -F auid>=1000 -F auid!=4294967295 -k privileged-mount If the command does not return any output, this is a finding.

Fix text

Configure the operating system to generate audit records when successful/unsuccessful attempts to use the "umount" command occur. Add or update the following rule in "/etc/audit/rules.d/audit.rules": -a always,exit -F path=/usr/bin/umount -F auid>=1000 -F auid!=4294967295 -k privileged-mount The audit daemon must be restarted for the changes to take effect.

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