Practice MP.L2-3.8.2 Details

Source of Reference: The official CMMC Level 2 Assessment Guide from the Office of the Under Secretary of Defense Acquisition & Sustainment.

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MP.L2-3.8.2 – MEDIA ACCESS

SECURITY REQUIREMENT

Limit access to CUI on system media to authorized users.

ASSESSMENT OBJECTIVES

Determine if:

[a] access to CUI on system media is limited to authorized users.

POTENTIAL ASSESSMENT METHODS AND OBJECTS

Examine

[SELECT FROM: System media protection policy; procedures addressing media storage;physical and environmental protection policy and procedures; access control policy and procedures; system security plan; system media; designated controlled areas; other relevant documents or records].

Interview

[SELECT FROM: Personnel with system media protection and storage responsibilities;personnel with information security responsibilities].

Test

[SELECT FROM: Organizational processes for storing media; mechanisms supporting or implementing secure media storage and media protection].

DISCUSSION

Access can be limited by physically controlling system media and secure storage areas.Physically controlling system media includes conducting inventories, ensuring procedures are in place to allow individuals to check out and return system media to the media library, and maintaining accountability for all stored media. Secure storage includes a locked drawer, desk, or cabinet, or a controlled media library.

FURTHER DISCUSSION

Limit physical access to CUI to people permitted to access CUI. Use locked or controlled storage areas and limit access to only those allowed to access CUI. Keep track of who accesses physical CUI in an audit log.

Example

Your company has CUI for a specific Army contract contained on a USB drive. In order to control the data, you establish specific procedures for handling the drive. You designate the project manager as the owner of the data and require anyone who needs access to the data to get permission from the data owner [a]. The data owner maintains a list of users that are authorized to access the information. Before an authorized individual can get access to the USB drive that contains the CUI they have to fill out a log and check out the drive. When they are done with the data, they check in the drive and return it to its secure storage location.

Potential Assessment Considerations

• Is a list of users who are authorized to access the CUI contained on system media maintained [a]?

KEY REFERENCES

• NIST SP 800-171 Rev 2 3.8.2