Title

Access control lists between development and testing network segments within a test and development environment must be in a deny-by-default posture. (Cat III impact)

Discussion

To prevent malicious or accidental leakage of information between test and development environments, organizations must implement a deny-by-default security posture. All traffic not explicitly permitted must be denied. Such rule sets prevent many malicious exploits or accidental leakage by regulating the ports, protocols, or services necessary between network segments within the test and development environment.

Check Content

Determine whether a deny-by-default security posture has been implemented for both ingress and egress traffic for the test and development environment. If the organization is not using a deny-by-default security posture for ingress and ingress traffic for the test and development environment, this is a finding.

Fix Text

Implement a deny-by-default security posture for both ingress and egress traffic between network segments in the test and development environment.

Additional Identifiers

Rule ID: SV-51529r1_rule

Vulnerability ID: V-39662

Group Title: ENTD0230 - Access control lists not in deny-by-default posture.

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.