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Missing description for security group rule.

Default Severity: low

Explanation

Security group rules should include a description for auditing purposes.

Simplifies auditing, debugging, and managing security groups.

Possible Impact

Descriptions provide context for the firewall rule reasons

Suggested Resolution

Add descriptions for all security groups rules

Insecure Example

The following example will fail the aws-ec2-add-description-to-security-group-rule check. 

 resource "aws_security_group" "bad_example" {
   name        = "http"

   ingress {
     from_port   = 80
     to_port     = 80
     protocol    = "tcp"
     cidr_blocks = [aws_vpc.main.cidr_block]
   }
 }

Secure Example

The following example will pass the aws-ec2-add-description-to-security-group-rule check. 

 resource "aws_security_group" "good_example" {
   name        = "http"
   description = "Allow inbound HTTP traffic"

   ingress {
     description = "HTTP from VPC"
     from_port   = 80
     to_port     = 80
     protocol    = "tcp"
     cidr_blocks = [aws_vpc.main.cidr_block]
   }
 }