Check: TOSS-04-030480
Tri-Lab Operating System Stack (TOSS) 4 STIG:
TOSS-04-030480
(in versions v2 r1 through v1 r1)
Title
Successful/unsuccessful uses of the "finit_module" command in TOSS must generate an audit record. (Cat II impact)
Discussion
Without generating audit records that are specific to the security and mission needs of the organization, it would be difficult to establish, correlate, and investigate the events relating to an incident or identify those responsible for one. Audit records can be generated from various components within the information system (e.g., module or policy filter). The "finit_module" command is used to load a kernel module. When a user logs on, the AUID is set to the UID of the account that is being authenticated. Daemons are not user sessions and have the loginuid set to "-1." The AUID representation is an unsigned 32-bit integer, which equals "4294967295." The audit system interprets "-1", "4294967295", and "unset" in the same way. Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000468-GPOS-00212, SRG-OS-000471-GPOS-00215
Check Content
Verify that an audit event is generated for any successful/unsuccessful use of the "finit_module" syscall by performing the following command to check the file system rules in "/etc/audit/audit.rules": $ sudo grep -w "finit_module" /etc/audit/audit.rules -a always,exit -F arch=b32 -S finit_module -F auid>=1000 -F auid!=unset -k module_chng -a always,exit -F arch=b64 -S finit_module -F auid>=1000 -F auid!=unset -k module_chng If the command does not return a line, or the line is commented out, this is a finding.
Fix Text
Configure the audit system to generate an audit event for any successful/unsuccessful use of the "finit_module" syscall by adding or updating the following rules in the "/etc/audit/rules.d/audit.rules" file: -a always,exit -F arch=b32 -S finit_module -F auid>=1000 -F auid!=unset -k module_chng -a always,exit -F arch=b64 -S finit_module -F auid>=1000 -F auid!=unset -k module_chng The audit daemon must be restarted for the changes to take effect.
Additional Identifiers
Rule ID: SV-253002r958412_rule
Vulnerability ID: V-253002
Group Title: SRG-OS-000037-GPOS-00015
Expert Comments
CCIs
| Number | Definition |
|---|---|
| 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-002884 |
Log organization-defined audit events for nonlocal maintenance and diagnostic sessions. |