Check: UBTU-16-020770
Canonical Ubuntu 16.04 LTS STIG:
UBTU-16-020770
(in versions v2 r3 through v1 r3)
Title
Successful/unsuccessful uses of the unix_update command must generate an audit record. (Cat II 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-000042-GPOS-00020, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215
Check Content
Verify that an audit event is generated for any successful/unsuccessful use of the "unix_update" command. Check for the following system call being audited by performing the following command to check the file system rules in "/etc/audit/audit.rules": # sudo grep -w "unix_update" /etc/audit/audit.rules -a always,exit -F path=/sbin/unix_update -F perm=x -F auid>=1000 -F auid!=4294967295 -k privileged-unix-update 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 uses of the "unix_update" command. Add or update the following rules in the "/etc/audit/audit.rules" file: -a always,exit -F path=/sbin/unix_update -F perm=x -F auid>=1000 -F auid!=4294967295 -k privileged-unix-update The audit daemon must be restarted for the changes to take effect. To restart the audit daemon, run the following command: # sudo systemctl restart auditd.service
Additional Identifiers
Rule ID: SV-215099r610931_rule
Vulnerability ID: V-215099
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-000135 |
The information system generates audit records containing the organization-defined additional, more detailed information that is to be included in the audit records. |
| 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. |