Linux: Kernel Module

Description

The Linux: Kernel Module test executes a shell command and evaluates the lines of output to determine if a kernel module is loaded or loadable.

The shellcommand_object element is used by a shellcommand_test to define the shell command being run.

The shellcommand_state element specifies the output value to check.

Technical Details

Artifact Parameters

linux.kernel_module_v1

Name	Type	Description
module	string	The name of the module being tested.

Supported Test Types

Linux: Kernel Module: Loadable

Linux: Kernel Module: Loaded

Test Type Parameters

linux.kernel_module.loadable_v1

Name	Type	Description
loadable	string	Is the module loadable? (Yes/No)

linux.kernel_module.loaded_v1

Name	Type	Description
loaded	string	Is the module currently loaded? (Yes/No)

Generated Content

linux.kernel_module.loadable_v1

XCCDF+AE

This is what the AE check looks like, inside a Rule, in the XCCDF.

<xccdf:complex-check operator="AND">
  <xccdf:check system="https://benchmarks.cisecurity.org/ae/0.5">
    <xccdf:check-content>
      <ae:artifact_expression id="xccdf_org.cisecurity.benchmarks_ae_[SECTION-NUMBER]">
        <ae:artifact_oval_id>[ARTIFACT-OVAL-ID]</ae:artifact_oval_id>
        <ae:title>[ARTIFACT-TITLE]</ae:title>
        <ae:artifact type="[ARTIFACT-TYPE-NAME]">
          <ae:parameters>
            <ae:parameter dt="string" name="module">[module.value]</ae:parameter>
          </ae:parameters>
        </ae:artifact>
        <ae:test type="[TEST-TYPE-NAME]">
          <ae:parameters>
            <ae:parameter dt="string" name="loadable">[loadable.value]</ae:parameter>
          </ae:parameters>
        </ae:test>
        <ae:profiles>
          <ae:profile idref="xccdf_org.cisecurity.benchmarks_profile_Level_1" />
        </ae:profiles>
      </ae:artifact_expression>
    </xccdf:check-content>
  </xccdf:check>
</xccdf:complex-check>

SCAP

XCCDF

For linux.kernel_module_v1 linux.kernel_module.loadable_v1 artifacts, the XCCDF check looks like this. There is no Value element in the XCCDF for this artifact.

<check system="http://oval.mitre.org/XMLSchema/oval-definitions-5">
  <check-content-ref
    href="[BENCHMARK-TITLE]-oval.xml"
    name="oval:org.cisecurity.benchmarks.[PLATFORM]:def:[ARTIFACT-OVAL-ID]" />
</check>

OVAL

Test

<shellcommand_test
  xmlns="http://oval.mitre.org/XMLSchema/oval-definitions-5#cmd"
  id="oval:org.cisecurity.benchmarks.[PLATFORM]:tst:[ARTIFACT-OVAL-ID]"
  check_existence="at_least_one_exists"
  check="[check.value]"
  comment="[ARTIFACT-TITLE]"
  version="1">
  <object object_ref="oval:org.cisecurity.benchmarks.[PLATFORM]:obj:[ARTIFACT-OVAL-ID]" />
  <state state_ref="oval:org.cisecurity.benchmarks.[PLATFORM]:ste:[ARTIFACT-OVAL-ID]" />
</shellcommand_test>

Object

<shellcommand_object
  xmlns="http://oval.mitre.org/XMLSchema/oval-definitions-5#cmd"
  id="oval:org.cisecurity.benchmarks.[PLATFORM]:obj:[ARTIFACT-OVAL-ID]"
  comment="[ARTIFACT-TITLE]"
  version="1">
  <command>[command.value]</command>
  <line_selection operation="pattern match">
    [line_selection.value]
  </line_selection>
</shellcommand_object>

State

<shellcommand_state
  xmlns="http://oval.mitre.org/XMLSchema/oval-definitions-5#cmd"
  id="oval:org.cisecurity.benchmarks.[PLATFORM]:ste:[ARTIFACT-OVAL-ID]"
  comment="[ARTIFACT-TITLE]"
  version="1">
  <stdout_line
    entity_check="at least one"
    operation="pattern match">
      [stdout_line.value]
  </stdout_line>
</shellcommand_state>

YAML

artifact-expression:
  artifact-unique-id: "[ARTIFACT-OVAL-ID]"
  artifact-title: "[ARTIFACT-TITLE]"
  artifact:
    type: "[ARTIFACT-TYPE-NAME]"
    parameters:
      - parameter:
          name: "module"
          dt: "string"
          value: "[module.value]"
  test:
    type: "[TEST-TYPE-NAME]"
    parameters:
      - parameter:
          name: "loadable"
          dt: "string"
          value: "[loadable.value]"

JSON

{
  "artifact-expression": {
    "artifact-unique-id": "[ARTIFACT-OVAL-ID]",
    "artifact-title": "[ARTIFACT-TITLE]",
    "artifact": {
      "type": "[ARTIFACT-TYPE-NAME]",
      "parameters": [
        {
          "parameter": {
            "name": "module",
            "type": "string",
            "value": "[module.value]"
          }
        }
      ]
    },
    "test": {
      "type": "[TEST-TYPE-NAME]",
      "parameters": [
        {
          "parameter": {
            "name": "loadable",
            "type": "string",
            "value": "[loadable.value]"
          }
        }
      ]
    }
  }
}