vmware:vmhost_module

Description

The vmware:vmhost_module test is used to verify no unauthorized kernel modules are loaded on the ESXi host.

The vmhost_module_object element is used by a vmhost_module_test to define the vmhost name and connection string, and name of the module to be evaluated.

The vmhost_module_state element holds information regarding the signed status of the specified module.

Technical Details

Artifact Parameters

vmware.vmhost_module_v2

Name	Type	Description
check_existence	string	Defines how many items should be collected.
vmhost_name	string	The name of the ESXi host to limit collection to. Set to NA if not applicable. Cannot be blank.
module_name	string	The name of the module to collect. Set to NA if not applicable. Cannot be blank.
vmhost_name_operation	string	Comparison operation.
module_name_operation	string	Comparison operation.

NOTE: The check_existence parameter is governed by a constraint allowing only the following values:

all_exist
any_exist
at_least_one_exists
none_exist
only_one_exists

NOTE: The vmhost_name_operation and module_name_operation parameters are governed by a constraint allowing only the following values:

equals
not equal
case insensitive equals
case insensitive not equal
greater than
less than
greater than or equal
less than or equal
bitwise and
bitwise or
pattern match
subset of
superset of

Supported Test Types

vmware:vmhost_module_signed_status

Test Type Parameters

vmware:vmhost_module_signed_status_v2

Name	Type	Description
check	string	Defines how many collected items must match the expected state.
operation	string	Comparison operation.
datatype	string	Data type.
signed_status	string	The digital signature status of the kernel module.

NOTE: The signed_status parameter is governed by a constraint allowing only the following values:

NA
VMware Signed
VMWare Certified

NOTE: The check parameter is governed by a constraint allowing only the following values:

all
at least one
none satisfy
only one

NOTE: The operation parameter is governed by a constraint allowing only the following values:

equals
not equal
case insensitive equals
case insensitive not equal
greater than
less than
greater than or equal
less than or equal
bitwise and
bitwise or
pattern match
subset of
superset of

NOTE: The datatype parameter is governed by a constraint allowing only the following values:

boolean
float
int
string
version
set

Generated Content

vmware:vmhost_module_signed_status_v2

XCCDF+AE

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

<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="check_existence">[check_existence.value]</ae:parameter>
          <ae:parameter dt="string" name="vmhost_name">[vmhost_name.value]</ae:parameter>
          <ae:parameter dt="string" name="vmhost_name_operation">[vmhost_name_operation.value]</ae:parameter>
          <ae:parameter dt="string" name="module_name">[module_name.value]</ae:parameter>
          <ae:parameter dt="string" name="module_name_operation">[module_name_operation.value]</ae:parameter>
        </ae:parameters>
      </ae:artifact>
      <ae:test type="[TEST-TYPE-NAME]">
        <ae:parameters>
          <ae:parameter dt="string" name="check">[check.value]</ae:parameter>
          <ae:parameter dt="string" name="operation">[operation.value]</ae:parameter>
          <ae:parameter dt="string" name="datatype">[datatype.value]</ae:parameter>
          <ae:parameter dt="string" name="signed_status">[signed_status.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>

SCAP

XCCDF

For vmware.vmhost_module_v2 vmware:vmhost_module_signed_status_v2 artifacts, an XCCDF Value element is generated.

<Value
  id="xccdf_org.cisecurity.benchmarks_value_[ARTIFACT-OVAL-ID]_var"
  operator="[operator.value]"
  type="[type.value]">
  <title>[RECOMMENDATION-TITLE]</title>
  <description>This value is used in Rule: [RECOMMENDATION-TITLE]</description>
  <value>[value.value]</value>
</Value>

For vmware.vmhost_module_v2 vmware:vmhost_module_signed_status_v2 artifacts, the XCCDF check looks like this.

<check system="http://oval.mitre.org/XMLSchema/oval-definitions-5">
  <check-export
    export-name="oval:org.cisecurity.benchmarks.[PLATFORM]:var:[ARTIFACT-OVAL-ID]"
    value-id="xccdf_org.cisecurity.benchmarks_value_[ARTIFACT-OVAL-ID]_var" />
  <check-export
    export-name="oval:org.cisecurity.benchmarks:var:100000"
    value-id="xccdf_org.cisecurity.benchmarks_value_esxi.connection" />
  <check-content-ref
    href="[BENCHMARK-TITLE]-oval.xml"
    name="oval:org.cisecurity.benchmarks.[PLATFORM]:def:[ARTIFACT-OVAL-ID]" />
</check>

OVAL

Test

<vmhost_module_test
  xmlns="http://oval.mitre.org/XMLSchema/oval-definitions-5#esxi"
  id="oval:org.cisecurity.benchmarks.[PLATFORM]:tst:[ARTIFACT-OVAL-ID]"
  check_existence="[check_existence.value]"
  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]" />
</vmhost_module_test>

Object

<vmhost_module_object
  xmlns="http://oval.mitre.org/XMLSchema/oval-definitions-5#esxi"
  id="oval:org.cisecurity.benchmarks.[PLATFORM]:obj:[ARTIFACT-OVAL-ID]"
  comment="[ARTIFACT-TITLE]"
  version="1">
  <connection_string var_ref="oval:org.cisecurity.benchmarks:var:100000" />
  <vmhost_name operation="[operation.value]">[vmhost_name.value]</vmhost_name>
  <module_name operation="[operation.value]">[module_name.value]</module_name>
</vmhost_module_object>

State

<vmhost_module_state
  xmlns="http://oval.mitre.org/XMLSchema/oval-definitions-5#esxi"
  id="oval:org.cisecurity.benchmarks.[PLATFORM]:ste:[ARTIFACT-OVAL-ID]"
  comment="[ARTIFACT-TITLE]"
  version="1">
  <signed_status
    datatype="[datatype.value]"
    operation="[operation.value]"
    var_ref="oval:org.cisecurity.benchmarks.[PLATFORM]:var:[ARTIFACT-OVAL-ID]" />
</vmhost_module_state>

Variable

<external_variable
  id="oval:org.cisecurity.benchmarks.[PLATFORM]:var:[ARTIFACT-OVAL-ID]"
  datatype="string"
  version="1"
  comment="This value is used in Rule: [RECOMMENDATION-TITLE]" />

YAML

artifact-expression:
  artifact-unique-id: "[ARTIFACT-OVAL-ID]"
  artifact-title: "[ARTIFACT-TITLE]"
  artifact:
    type: "[ARTIFACT-TYPE-NAME]"
    parameters:
      - parameter:
          name: "check_existence"
          dt: "string"
          value: "[check_existence.value]"
      - parameter:
          name: "vmhost_name"
          dt: "string"
          value: "[vmhost_name.value]"
      - parameter:
          name: "vmhost_name_operation"
          dt: "string"
          value: "[vmhost_name_operation.value]"
      - parameter:
          name: "module_name"
          dt: "string"
          value: "[module_name.value]"
      - parameter:
          name: "module_name_operation"
          dt: "string"
          value: "[module_name_operation.value]"
  test:
    type: "[TEST-TYPE-NAME]"
    parameters:
      - parameter:
          name: "check"
          dt: "string"
          value: "[check.value]"
      - parameter:
          name: "operation"
          dt: "string"
          value: "[operation.value]"
      - parameter:
          name: "datatype"
          dt: "string"
          value: "[datatype.value]"
      - parameter:
          name: "signed_status"
          dt: "string"
          value: "[signed_status.value]"

JSON

{
  "artifact-expression": {
    "artifact-unique-id": "[ARTIFACT-OVAL-ID]",
    "artifact-title": "[ARTIFACT-TITLE]",
    "artifact": {
      "type": "[ARTIFACT-TYPE-NAME]",
      "parameters": [
        {
          "parameter": {
            "name": "check_existence",
            "dt": "string",
            "value": "[check_existence.value]"
          }
        },
        {
          "parameter": {
            "name": "vmhost_name",
            "dt": "string",
            "value": "[vmhost_name.value]"
          }
        },
        {
          "parameter": {
            "name": "vmhost_name_operation",
            "dt": "string",
            "value": "[vmhost_name_operation.value]"
          }
        },
        {
          "parameter": {
            "name": "module_name",
            "dt": "string",
            "value": "[module_name.value]"
          }
        },
        {
          "parameter": {
            "name": "module_name_operation",
            "dt": "string",
            "value": "[module_name_operation.value]"
          }
        }
      ]
    },
    "test": {
      "type": "[TEST-TYPE-NAME]",
      "parameters": [
        {
          "parameter": {
            "name": "check",
            "dt": "string",
            "value": "[check.value]"
          }
        },
        {
          "parameter": {
            "name": "operation",
            "dt": "string",
            "value": "[operation.value]"
          }
        },
        {
          "parameter": {
            "name": "datetype",
            "dt": "string",
            "value": "[datatype.value]"
          }
        },
        {
          "parameter": {
            "name": "signed_status",
            "dt": "string",
            "value": "[signed_status.value]"
          }
        }
      ]
    }
  }
}