Title

Optional component installation and component repair must be prevented from using Windows Update. (Cat III impact)

Discussion

Uncontrolled system updates can introduce issues to a system. Obtaining update components from an outside source may also potentially provide sensitive information outside of the enterprise. Optional component installation or repair must be obtained from an internal source.

Check Content

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Subkey: \Software\Microsoft\Windows\CurrentVersion\Policies\Servicing \ Value Name: UseWindowsUpdate Type: REG_DWORD Value: 2

Fix Text

Configure the policy value for Computer Configuration -> Administrative Templates -> System -> "Specify settings for optional component installation and component repair" to "Enabled" and with "Never attempt to download payload from Windows Update" selected.

Additional Identifiers

Rule ID: SV-48296r2_rule

Vulnerability ID: V-36677

Group Title: WINCC-000018

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.