V-243483

Discussion

The configuration of an AD trust relationship is one of the steps used to allow users in one domain to access resources in another domain, forest, or Kerberos realm. When a trust is defined between a DoW organization and a non-DoW organization, the security posture of the two organizations might be significantly different. If the non-DoW organization maintained a less secure environment and that environment were compromised, the presence of the AD trust might allow the DoW environment to be compromised also.

Check Content

1. Refer to the list of identified trusts obtained in a previous check (V8530).

2. For each of the identified trusts, determine if the other trust party is a non-DoW entity. For example, if the fully qualified domain name of the other party does not end in ".mil", the other party is probably not a DoW entity.

3. Review the local documentation approving the external network connection and documentation indicating explicit approval of the trust by the DAA.

4. The external network connection documentation is maintained by the IAO\NSO for compliance with the Network Infrastructure STIG.

5. If any trust is defined with a non-DoW system and there is no documentation indicating approval of the external network connection and explicit DAA approval of the trust, then this is a finding.