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

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-72171	RHEL-07-030740	SV-86795r6_rule		Medium

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 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

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 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

STIG	Date
Red Hat Enterprise Linux 7 Security Technical Implementation Guide	2019-03-08

Details

Check Text ( C-72405r10_chk )
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.

Check Text ( C-72405r10_chk )

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 (F-78525r8_fix)
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.

Fix Text (F-78525r8_fix)

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.