Webhooks Should Be Configured To Use SSL

policy name: organization_webhook_doesnt_require_ssl

severity: LOW

Description

Webhooks that are not configured with SSL enabled could expose your software to man in the middle attacks (MITM).

Threat Example(s)

If SSL verification is disabled, any party with access to the target DNS domain can masquerade as your designated payload URL, allowing it freely read and affect the response of any webhook request. In the case of GitHub Enterprise Server instances, it may be sufficient only to control the DNS configuration of the network where the instance is deployed, as an attacker can redirect traffic to the target domain in your internal network directly to them, and this is often much easier than compromising an internet-facing domain.

Remediation

  1. Make sure you have admin permissions
  2. Go to the organization settings page
  3. Select ‘Webhooks’
  4. Press on the insecure webhook
  5. Verify URL starts with https
  6. Enable ‘SSL verification’
  7. Click ‘Update webhook’