RHEL-10-500660 RHEL 10 must generate audit records for successful and unsuccessful uses of the "umount" system call.
All changes in this version
Maps to AU-3, AU-12, MA-4(1) via CCI-000130, CCI-000169, CCI-002884, CCI-000172
Title
RHEL 10 must generate audit records for successful and unsuccessful uses of the "umount" system call.
Control
Verify RHEL 10 generates an audit record for all uses of the "umount" system call with the following command: $ sudo auditctl -l | grep b32 | grep 'umount\b' -a always,exit -F arch=b32 -S umount -F auid>=1000 -F auid!=-1 -F key=privileged-umount If the command does not return a line, or the line is commented out, this is a finding.
Discussion
The changing of file permissions could indicate that a user is attempting to gain access to information that would otherwise be disallowed. Auditing discretionary access control (DAC) modifications can facilitate the identification of patterns of abuse among both authorized and unauthorized users. Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215
Related controls
CCI-000130, CCI-000169, CCI-000172, CCI-002884
Fix
Configure RHEL 10 to generate audit records upon successful and unsuccessful uses of the "umount" system call by adding or updating the following rules in "/etc/audit/audit.rules" and adding the following rules to "/etc/audit/rules.d/perm_mod.rules" or updating the existing rules in files in the "/etc/audit/rules.d/" directory: -a always,exit -F arch=b32 -S umount -F auid>=1000 -F auid!=unset -k privileged-umount Restart the audit daemon with the following command for the changes to take effect: $ sudo service auditd restart