15.4: Disable Wireless Access on Devices if Not Required

Disable wireless access on devices that do not have a business purpose for wireless access.

Asset Type

Security Function

Implementation Groups

Devices

Protect

3

Dependencies

  • Sub-control 1.4: Maintain Detailed Asset Inventory

  • Sub-control 1.5: Maintain Asset Inventory Information

Inputs

  1. The list of endpoints

Operations

  1. Enumerate all wireless-access-capable endpoints

  2. For each identified endpoint:
    1. Determine whether the device has an identified business purpose for wireless access

    2. Examine the endpoint’s configuration to determine whether wireless access is enabled

  3. Enumerate all endpoints with wireless access enabled and without an identified business purpose for wireless access

  4. Enumerate all endpoints without wireless access enabled and without an identified business purpose for wireless access

  5. Enumerate all endpoints with wireless access enabled and with an identified business purpose for wireless access

Measures

  • M1 = List of all wireless-access-capable endpoints

  • M2 = List of endpoints with wireless access enabled and without an identified business purpose for wireless access

  • M3 = List of endpoints without wireless access enabled and without an identified business purpose

  • M4 = List of endpoints with wireless access enabled and with an identified business purpose for wireless access

  • M5 = Count of wireless-access-capable endpoints (count of M1)

  • M6 = Count of endpoints with wireless access enabled and without an identified business purpose for wireless access (count of M2)

  • M7 = Count of endpoints without wireless access enabled and without an identified business purpose (count of M3)

  • M8 = Count of endpoints with wireless access enabled and with an identified business purpose for wireless access (count of M4)

  • M9 = M7 + M8

Metrics

Coverage

Metric

The ratio of appropriately configured wireless-access-capable endpoints to the total
number of wireless-access-capable endpoints

Calculation

M9 / M5