Windows Server 2019 shared user accounts must not be permitted.

Documentable No

Rule ID SV-205699r958482_rule

CCI References

CCI-000764

Discussion

Shared accounts (accounts where two or more people log on with the same user identification) do not provide adequate identification and authentication. There is no way to provide for nonrepudiation or individual accountability for system access and resource usage.

Check Procedure

Determine whether any shared accounts exist. If no shared accounts exist, this is NA.

Shared accounts, such as required by an application, may be approved by the organization.  This must be documented with the ISSO. Documentation must include the reason for the account, who has access to the account, and how the risk of using the shared account is mitigated to include monitoring account activity.

If unapproved shared accounts exist, this is a finding.

Fix Action

Remove unapproved shared accounts from the system.

Document required shared accounts with the ISSO. Documentation must include the reason for the account, who has access to the account, and how the risk of using the shared account is mitigated to include monitoring account activity.