lollms-webui/docs/vulenerabilities/events/lollms_chatbox_events.md

Security Vulnerability Report for lollms_chatbox_events.py

This report presents an analysis of the provided Python code in the lollms_chatbox_events.py file and identifies potential security vulnerabilities. The vulnerabilities are presented with corresponding code snippets, explanations of potential flaws, and suggested fixes.

Table of Contents

1. Uncontrolled Resource Consumption (CWE-400)
2. Path Traversal (CWE-22)
3. Missing Access Control for Sensitive Functionality

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1. Uncontrolled Resource Consumption (CWE-400)

Vulnerable Code Snippet:

@sio.on('take_picture')
def take_picture(sid):
    try:
        client = lollmsElfServer.session.get_client(sid)
        lollmsElfServer.info("Loading camera")
        if not PackageManager.check_package_installed("cv2"):
            PackageManager.install_package("opencv-python")
        import cv2
        cap = cv2.VideoCapture(0)
        # ...

Explanation: The take_picture function captures an image using the default camera device (cv2.VideoCapture(0)). This functionality can lead to uncontrolled resource consumption, as an attacker could potentially trigger this event multiple times, causing the application to consume significant resources.

Recommended Fix: Implement a rate-limiting mechanism to restrict the number of times the take_picture event can be triggered within a certain timeframe.

from fastapi.security import OAuth2PasswordBearer

oauth2_scheme = OAuth2PasswordBearer(tokenUrl="token")

@sio.on('take_picture')
@ratelimit(requests=1, per=60)  # Limit to 1 request per minute
def take_picture(sid, auth: str = Depends(oauth2_scheme)):
    # ...

---

2. Path Traversal (CWE-22)

Vulnerable Code Snippet:

def add_webpage(sid, data):
    # ...
    url = data['url']
    index = find_first_available_file_index(lollmsElfServer.lollms_paths.personal_uploads_path, "web_", ".txt")
    file_path = lollmsElfServer.lollms_paths.personal_uploads_path / f"web_{index}.txt"
    scrape_and_save(url=url, file_path=file_path)
    # ...

Explanation: The add_webpage function saves the scraped webpage content to a file. The file path is constructed using the lollmsElfServer.lollms_paths.personal_uploads_path and a generated index. An attacker may manipulate the URL to perform a path traversal attack, overwriting sensitive files or accessing unauthorized data.

Recommended Fix: Use the provided sanitize_path function from the lollms.security module to ensure that the generated file path is safe and does not allow path traversal attacks.

from lollms.security import sanitize_path

def add_webpage(sid, data):
    # ...
    url = data['url']
    index = find_first_available_file_index(lollmsElfServer.lollms_paths.personal_uploads_path, "web_", ".txt")
    file_path = sanitize_path(lollmsElfServer.lollms_paths.personal_uploads_path / f"web_{index}.txt")
    scrape_and_save(url=url, file_path=file_path)
    # ...

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3. Missing Access Control for Sensitive Functionality

Explanation: The provided code does not have any access control checks for sensitive functionality, such as taking pictures or adding web pages. If the server is exposed to the internet, an attacker could potentially trigger these events and consume resources or access sensitive data.

Recommended Fix: Use the provided forbid_remote_access function from the lollms.security module to ensure that sensitive functionality is restricted to localhost.

from lollms.security import forbid_remote_access

def add_events(sio:socketio):
    forbid_remote_access(lollmsElfServer)

    # ...

Add the forbid_remote_access call at the beginning of the add_events function to restrict sensitive functionality to localhost.