id: openvpn-hhi

info:
  name: OpenVPN Host Header Injection
  author: twitter.com/Dheerajmadhukar
  severity: info
  description: A vulnerability in OpenVPN Access Server allows remote attackers to inject arbitrary redirection URLs by using the 'Host' HTTP header field.
  metadata:
    max-request: 1
  tags: openvpn,hostheader-injection

http:
  - raw:
      - |
        GET / HTTP/1.1
        Host: {{randstr}}.tld

    matchers-condition: and
    matchers:
      - type: word
        words:
          - "https://{{randstr}}.tld/__session_start__/"
          - "openvpn_sess"
        part: header
        condition: and

      - type: status
        status:
          - 302

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