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Medium ELB Regional

Application load balancer should be configured to drop invalid http headers

NIST

Description

Verifies that Application Load Balancers drop invalid HTTP headers, reducing the risk of header injection and malformed request issues.

Remediation

To remediate this issue, configure your load balancer to drop invalid header fields.

Steps

  1. Open the Amazon EC2 console at https://console.aws.amazon.com/ec2/.
  2. In the navigation pane, choose Load balancers.
  3. Choose the Application Load Balancer.
  4. From Actions, choose Edit attributes.
  5. Under Drop Invalid Header Fields, choose Enable.
  6. Choose Save.

Compliance

NIST
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