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NACL Allows Unrestricted Access To Admin Ports

Overview​

The Network Access Control List (NACL) function provide stateless filtering of ingress and egress network traffic to AWS resources. It is recommended that no NACL allows unrestricted ingress access to remote server administration ports, such as SSH to port 22 and RDP to port 3389.

Public access to remote server administration ports, such as 22 and 3389, increases resource attack surface and unnecessarily raises the risk of resource compromise.

Vendor​

AWS

Cloud Service​

EC2

Input​

{"adminPorts":{"label":"Admin ports","value":[22,3389],"type":"number[]"}}

CIS AWS v1.5.0 5.1, EC2.21

Severity​

3

Item Types​

AWS::EC2::NetworkAcl