privesc-lua: lua - Privilege Escalation

id: privesc-lua

info:
  name: lua - Privilege Escalation
  author: daffainfo
  severity: high
  description: |
    Lua is a powerful, efficient, lightweight, embeddable scripting language. It is often used as a scripting language for game development and other applications that require a customizable and extensible scripting interface. Lua is known for its simplicity, speed, and ease of integration with other languages and systems.
  reference:
    - https://gtfobins.github.io/gtfobins/lua/
  metadata:
    verified: true
    max-request: 3
  tags: code,linux,lua,privesc,local

self-contained: true
code:
  - engine:
      - sh
      - bash
    source: |
      whoami

  - engine:
      - sh
      - bash
    source: |
      lua -e 'os.execute("whoami")'

  - engine:
      - sh
      - bash
    source: |
      sudo lua -e 'os.execute("whoami")'

    matchers-condition: and
    matchers:
      - type: word
        part: code_1_response
        words:
          - "root"
        negative: true

      - type: dsl
        dsl:
          - 'contains(code_2_response, "root")'
          - 'contains(code_3_response, "root")'
        condition: or
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