Check: RHEL-09-654215
RHEL 9 STIG:
RHEL-09-654215
(in version v2 r3)
Title
RHEL 9 must generate audit records for all account creations, modifications, disabling, and termination events that affect /etc/sudoers. (Cat II impact)
Discussion
The actions taken by system administrators must be audited to keep a record of what was executed on the system, as well as for accountability purposes. Editing the sudoers file may be sign of an attacker trying to establish persistent methods to a system, auditing the editing of the sudoers files mitigates this risk. Satisfies: SRG-OS-000004-GPOS-00004, SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000304-GPOS-00121, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000470-GPOS-00214, SRG-OS-000471-GPOS-00215, SRG-OS-000239-GPOS-00089, SRG-OS-000240-GPOS-00090, SRG-OS-000241-GPOS-00091, SRG-OS-000303-GPOS-00120, SRG-OS-000466-GPOS-00210, SRG-OS-000476-GPOS-00221
Check Content
Verify RHEL 9 generates audit records for all account creations, modifications, disabling, and termination events that affect "/etc/sudoers" with the following command: $ sudo auditctl -l | grep '/etc/sudoers[^.]' -w /etc/sudoers -p wa -k identity If the command does not return a line, or the line is commented out, this is a finding.
Fix Text
Configure RHEL 9 to generate audit records for all account creations, modifications, disabling, and termination events that affect "/etc/sudoers". Add or update the following file system rule to "/etc/audit/rules.d/audit.rules": -w /etc/sudoers -p wa -k identity To load the rules to the kernel immediately, use the following command: $ sudo augenrules --load
Additional Identifiers
Rule ID: SV-258217r1045436_rule
Vulnerability ID: V-258217
Group Title: SRG-OS-000004-GPOS-00004
Expert Comments
CCIs
| Number | Definition |
|---|---|
| CCI-000015 |
Support the management of system accounts using organization-defined automated mechanisms. |
| CCI-000018 |
Automatically audit account creation actions. |
| CCI-000130 |
Ensure that audit records contain information that establishes what type of event occurred. |
| CCI-000135 |
Generate audit records containing the organization-defined additional information that is to be included in the audit records. |
| CCI-000169 |
Provide audit record generation capability for the event types the system is capable of auditing as defined in AU-2 a on organization-defined information system components. |
| CCI-000172 |
Generate audit records for the event types defined in AU-2 c that include the audit record content defined in AU-3. |
| CCI-001403 |
Automatically audit account modification actions. |
| CCI-001404 |
Automatically audit account disabling actions. |
| CCI-001405 |
Automatically audit account removal actions. |
| CCI-002130 |
Automatically audit account enabling actions. |
| CCI-002132 |
The information system notifies organization-defined personnel or roles for account enabling actions. |
| CCI-002884 |
Log organization-defined audit events for nonlocal maintenance and diagnostic sessions. |