Load balancer listener must use a secure SSL policy

High AWS General aws-elasticloadbalancingv2-listener-load-balancer

Applies to

AWS::ElasticLoadBalancingV2::Listener

What CGPulse checks

A resource passes this rule when sslPolicy must not be one of ["ELBSecurityPolicy-2016-08","ELBSecurityPolicy-TLS-1-0-2015-04","ELBSecurityPolicy-TLS-1-1-2017-01"]. Anything else is reported as a finding with the evaluated property value attached as evidence.

How to fix it

Set minimum TLS version to 1.2 to prevent protocol downgrade attacks. In AWS Console: Resource > Settings > set Minimum TLS version to 1.2. See: https://docs.aws.amazon.com/prescriptive-guidance/latest/encryption-best-practices/welcome.html

Terraform

resource "aws_lb_listener" "{name}" {
  ssl_policy = "ELBSecurityPolicy-TLS13-1-2-2021-06"
}

Compliance frameworks

Cloud Security: AWS Foundations
GDPR: Data Protection Controls
HIPAA: Health Information Protection164.312(e)(1)
ISO 27001: Information SecurityA.10.1.1
NIST 800-53: Cloud Security ControlsSC-8
PCI DSS v4.04.2.1
SOC 2: Trust ServicesCC6.1

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