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The audit system must be configured to audit the loading and unloading of dynamic kernel modules - /sbin/rmmod
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-29288 | GEN002825-5 | SV-37741r2_rule | ECAR-1 ECAR-2 ECAR-3 | Medium |
| Description |
|---|
| Actions concerning dynamic kernel modules must be recorded as they are substantial events. Dynamic kernel modules can increase the attack surface of a system. A malicious kernel module can be used to substantially alter the functioning of a system, often with the purpose of hiding a compromise from the SA. |
| STIG | Date |
|---|---|
| Red Hat Enterprise Linux 5 Security Technical Implementation Guide | 2013-04-10 |
Details
| Check Text ( C-36939r1_chk ) |
|---|
| Determine if the /sbin/rmmod file is audited. # cat /etc/audit/audit.rules | grep "/sbin/rmmod" If the result does not start with "-w" and contain "-p x", this is a finding. |
| Fix Text (F-32203r2_fix) |
|---|
| The use of audit keys consistent with the provided example is encouraged to provide for uniform audit logs, however omitting the audit key or using an alternate audit key is not a finding. Procedure: Configure auditing of the /sbin/rmmod file. Add the following to the "etc/audit/audit.rules" or "etc/audit.rules" file: -w /sbin/rmmod -p x Restart the auditd service. # service auditd restart |