CVE-2024-32005

Local file inclusion vulnerability in NiceGUI allows unauthorized file access.

• CVSS 8.2
• CWE-22
• Input Validation and Sanitization
• Remote

NiceGUI is an easy-to-use, Python-based UI framework. A local file inclusion is present in the NiceUI leaflet component when requesting resource files under the `/_nicegui/{__version__}/resources/{key}/{path:path}` route. As a result any file on the backend filesystem which the web server has access to can be read by an attacker with access to the NiceUI leaflet website. This vulnerability has been addressed in version 1.4.21. Users are advised to upgrade. There are no known workarounds for this vulnerability.

CVE

CVE-2024-32005

CWE

CWE-22

CVSS base score

8.2

Published

2024-04-12

OWASP

A06 Security Misconfiguration

Orthogonal defect classification

Checking

Code defect classification

Incorrect Functionality

Category

Input Validation and Sanitization

Subcategory

Local File Inclusion (LFI)

Accessibility scope

Remote

Impact

Information Disclosure

Fixed by upgrading

Yes

Solution

Upgrade to NiceGUI version 1.4.21 or later.

from nicegui import ui

@ui.route('/_nicegui/{__version__}/resources/{key}/{path:path}')
def serve_resource(key, path):
    return ui.send_file(f'resources/{key}/{path}')

ui.run()

from nicegui import ui
from fastapi.responses import FileResponse
from pathlib import Path

SAFE_BASE_DIR = Path('resources').resolve()
ALLOWED_EXTENSIONS = {'.txt', '.csv'}

@ui.route('/_nicegui/{__version__}/resources/{key}/{path:path}')
def serve_resource(key: str, path: str):
    requested_path = (SAFE_BASE_DIR / key / path).resolve()

    if not requested_path.is_file():
        return {'error': 'File not found'}

    if not str(requested_path).startswith(str(SAFE_BASE_DIR)):
        return {'error': 'Access denied'}

    if requested_path.suffix.lower() not in ALLOWED_EXTENSIONS:
        return {'error': 'Only .txt and .csv files are allowed'}

    return FileResponse(requested_path)

ui.run()

/_nicegui/1.4.20/resources/key/../../../../etc/passwd

@misc{vaitp:cve202432005,
  title        = {{Local file inclusion vulnerability in NiceGUI allows unauthorized file access.}},
  author       = {Bogaerts, Fr\'ed\'eric and Ivaki, Naghmeh and Fonseca, Jos\'e},
  year         = {2024},
  note         = {VAITP Python Vulnerability Dataset, entry CVE-2024-32005},
  howpublished = {\url{https://netpack.pt/vaitp/vulnerability/CVE-2024-32005/}}
}