An egress security group rule allows traffic to /0.
Default Severity: critical
Explanation
Opening up ports to connect out to the public internet is generally to be avoided. You should restrict access to IP addresses or ranges that are explicitly required where possible.
Possible Impact
Your port is egressing data to the internet
Suggested Resolution
Set a more restrictive cidr range
Insecure Example
The following example will fail the aws-ec2-no-public-egress-sgr check.
resource "aws_security_group" "bad_example" {
egress {
cidr_blocks = ["0.0.0.0/0"]
}
}
Secure Example
The following example will pass the aws-ec2-no-public-egress-sgr check.
resource "aws_security_group" "good_example" {
egress {
cidr_blocks = ["1.2.3.4/32"]
}
}