IA.L2-3.5.6  

Reference: CMMC v2.13

Family: IA

Level Introduced: 2

Title: Identifier Handling

Practice:
Disable identifiers after a defined period of inactivity.

Further Discussion:
Identifiers are uniquely associated with an individual, account, process, or device. An inactive identifier is one that has not been used for a defined extended period of time. For example, a user account may be needed for a certain time to allow for transition of business processes to existing or new staff. Once use of the identifier is no longer necessary, it should be disabled as soon as possible. Failure to maintain awareness of accounts that are no longer needed yet still active could allow an adversary to exploit IT services.

Example
One of your responsibilities is to enforce your company’s inactive account policy: any account that has not been used in the last 45 days must be disabled [a]. You enforce this by writing a script that runs once a day to check the last login date for each account and generates a report of the accounts with no login records for the last 45 days. After reviewing the report, you notify each inactive employee’s supervisor and disable the account [b].

Potential Assessment Considerations
• Are user accounts or identifiers monitored for inactivity [b]?

Source: CMMC v2.13