Level 5 CMMC - CMMC Practices

MP.2.121  

Reference: CMMC 1.02

Family: MP

Level Introduced: 2

Practice:
Control the use of removable media on system components.

CMMC Clarification:
Removable media is any type of media storage that you can remove from your computer or machine, for example, CDs, DVDs, diskettes and USB drives. Write a specific policy for removable media for your company. The policy should cover that there are two types of removable media: write-once media and rewritable media. Limit the use of removable media to the smallest number needed. Scan all removable media for viruses. Track removable media that you own and make sure you reuse and dispose of it properly.

Example
You are in charge of IT operations at your company. You establish a policy for USB drives. All of them must be scanned for viruses and bugs before use on the company’s networks. You set up a separate computer to scan these drives before anyone uses them on the network. This computer has anti-virus software installed that is kept up to date.

3.8.7

Control the use of removable media on system components.

Discussion:
In contrast to requirement 3.8.1, which restricts user access to media, this requirement restricts the use of certain types of media on systems, for example, restricting or prohibiting the use of flash drives or external hard disk drives. Organizations can employ technical and nontechnical controls (e.g., policies, procedures, and rules of behavior) to control the use of system media. Organizations may control the use of portable storage devices, for example, by using physical cages on workstations to prohibit access to certain external ports, or disabling or removing the ability to insert, read, or write to such devices.

Organizations may also limit the use of portable storage devices to only approved devices including devices provided by the organization, devices provided by other approved organizations, and devices that are not personally owned. Finally, organizations may control the use of portable storage devices based on the type of device, prohibiting the use of writeable, portable devices, and implementing this restriction by disabling or removing the capability to write to such devices.

Source: NIST Special Publication 800-171 Rev. 2

MP-7

MEDIA USE

Description:
The organization [Selection: restricts; prohibits] the use of [Assignment: organization-defined types of information system media] on [Assignment: organization-defined information systems or system components] using [Assignment: organization-defined security safeguards].

Supplemental Guidance:
Information system media includes both digital and non-digital media. Digital media includes, for example, diskettes, magnetic tapes, external/removable hard disk drives, flash drives, compact disks, and digital video disks. Non-digital media includes, for example, paper and microfilm. This control also applies to mobile devices with information storage capability (e.g., smart phones, tablets, E-readers). In contrast to MP-2, which restricts user access to media, this control restricts the use of certain types of media on information systems, for example, restricting/prohibiting the use of flash drives or external hard disk drives. Organizations can employ technical and nontechnical safeguards (e.g., policies, procedures, rules of behavior) to restrict the use of information system media. Organizations may restrict the use of portable storage devices, for example, by using physical cages on workstations to prohibit access to certain external ports, or disabling/removing the ability to insert, read or write to such devices. Organizations may also limit the use of portable storage devices to only approved devices including, for example, devices provided by the organization, devices provided by other approved organizations, and devices that are not personally owned. Finally, organizations may restrict the use of portable storage devices based on the type of device, for example, prohibiting the use of writeable, portable storage devices, and implementing this restriction by disabling or removing the capability to write to such devices. Related controls: AC-19, PL-4.

Source: NIST Special Publication 800-53 Rev. 4

Source: CMMC v1.02