VPC security groups attached to EC2 instances should not permit ingress from ‘0.0.0.0/0’ to all ports¶
EC2 security groups should permit access only to necessary ports to prevent access to potentially vulnerable services on other ports.
Console Remediation Steps¶
Navigate to EC2.
In the left navigation, select Security Groups.
Select the desired security group and click the Inbound tab.
Click Edit rules.
Remove any permissions that allow ‘0.0.0.0/0’ to all ports.
CLI Remediation Steps¶
Remove ingress rules which allow connectivity from anywhere to all ports and protocols:
aws ec2 revoke-security-group-ingress --group-id <id> --ip-permissions <ip_permissions>