4.8: Uninstall or Disable Unnecessary Services on Enterprise Assets and Software

Uninstall or disable unnecessary services on enterprise assets and software, such as an unused file sharing service, web application module, or service function.

Asset Type	Security Function	Implementation Groups
Devices	Protect	2, 3

Dependencies

• Safeguard 1.1: Establish and Maintain Detailed Enterprise Asset Inventory

• Safeguard 2.1: Establish and Maintain a Software Inventory

Inputs

1. GV1: Enterprise asset inventory

2. GV5: Authorized software inventory

3. GV3: Configuration standard

Operations

1. Use GV5 to identify and enumerate authorized services (M1)

2. Use GV1 to identify and enumerate services on enterprise assets (M2)

3. Compare outputs from Operations 1 and 2

   1. Identify and enumerate authorized services on assets (M3)

   2. Identify and enumerate unauthorized services on assets (M4)

4. For authorized services in Operation 3.2, use GV3 to check configurations

   1. Identify and enumerate services that are configured correctly (disabled) (M5)

   2. Identify and enumerate services that are configured improperly (enabled) (M6)

Measures

• M1 = Count of authorized services

• M2 = Count of services on enterprise assets

• M3 = Count of authorized services on assets

• M4 = Count of unauthorized services on assets

• M5 = Count of unauthorized services that are disabled

• M6 = Count of unauthorized serivces that are enabled

Metrics

Compliant Services

Metric	The percentage of services installed/running that are enterprise essential
Calculation	(M3 + M5) / M2

Non-compliant Services

• • Metric

  • The percentage of services installed/running that are

    not enteprise essential

• • Calculation

  • M6 / M2