Check: SLES-15-030360
SUSE Linux Enterprise Server 15 STIG:
SLES-15-030360
(in versions v1 r13 through v1 r1)
Title
The SUSE operating system must generate audit records for all uses of the umount system call. (Cat III impact)
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 commands. The organization must maintain audit trails in sufficient detail to reconstruct events to determine the cause and impact of compromise. 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
Check Content
Verify the SUSE operating system generates an audit record for all uses of the "umount" and "umount2" system calls. Check that the system calls are being audited by performing the following command: > sudo auditctl -l | grep 'umount' -a always,exit -F arch=b32 -S umount -F auid>=1000 -F auid!=-1 -k privileged-umount -a always,exit -F arch=b32 -S umount2 -F auid>=1000 -F auid!=-1 -k privileged-umount -a always,exit -F arch=b64 -S umount2 -F auid>=1000 -F auid!=-1 -k privileged-umount If both the "b32" and "b64" audit rules are not defined for the "umount" syscall, this is a finding. Note: The "-k" allows for specifying an arbitrary identifier. The string following "-k" does not need to match the example output above.
Fix Text
Configure the SUSE operating system to generate an audit record for all uses of the "umount" and "umount2" system calls. Add or update the following rules to "/etc/audit/rules.d/audit.rules": -a always,exit -F arch=b32 -S umount -F auid>=1000 -F auid!=4294967295 -k privileged-umount -a always,exit -F arch=b32 -S umount2 -F auid>=1000 -F auid!=4294967295 -k privileged-umount -a always,exit -F arch=b64 -S umount2 -F auid>=1000 -F auid!=4294967295 -k privileged-umount To reload the rules file, restart the audit daemon > sudo systemctl restart auditd.service or issue the following command: > sudo augenrules --load
Additional Identifiers
Rule ID: SV-234935r854242_rule
Vulnerability ID: V-234935
Group Title: SRG-OS-000037-GPOS-00015
Expert Comments
CCIs
| Number | Definition |
|---|---|
| CCI-000130 |
The information system generates audit records containing information that establishes what type of event occurred. |
| CCI-000169 |
The information system provides audit record generation capability for the auditable events defined in AU-2 a. at organization-defined information system components. |
| CCI-000172 |
The information system generates audit records for the events defined in AU-2 d. with the content defined in AU-3. |
| CCI-002884 |
The organization audits nonlocal maintenance and diagnostic sessions^ organization-defined audit events. |