The Red Hat Enterprise Linux operating system must audit all uses of the mount command and syscall.

From Red Hat Enterprise Linux 7 Security Technical Implementation Guide

Part of SRG-OS-000042-GPOS-00020

Associated with: CCI-000135 CCI-002884

SV-86795r6_rule The Red Hat Enterprise Linux operating system must audit all uses of the mount command and syscall.

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 "mount" command and syscall 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 "mount" /etc/audit/audit.rules -a always,exit -F arch=b32 -S mount -F auid>=1000 -F auid!=4294967295 -k privileged-mount -a always,exit -F arch=b64 -S mount -F auid>=1000 -F auid!=4294967295 -k privileged-mount -a always,exit -F path=/usr/bin/mount -F auid>=1000 -F auid!=4294967295 -k privileged-mount If all uses of the "mount" command and syscall are not being audited, this is a finding.

Fix text

Configure the operating system to generate audit records when successful/unsuccessful attempts to use the "mount" command and syscall occur. Add or update the following rules in "/etc/audit/rules.d/audit.rules": Note: The rules are duplicated to cover both 32-bit and 64-bit architectures. Only the lines appropriate for the system architecture must be configured. -a always,exit -F arch=b32 -S mount -F auid>=1000 -F auid!=4294967295 -k privileged-mount -a always,exit -F arch=b64 -S mount -F auid>=1000 -F auid!=4294967295 -k privileged-mount -a always,exit -F path=/usr/bin/mount -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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