CVE-2024-52327

Executive Summary

CVE-2024-52327 exposes a critical authentication bypass vulnerability in the cloud service used by ECOVACS robot lawnmowers and vacuums. An authenticated attacker can bypass the PIN entry required to access the live video feed, allowing unauthorized surveillance of the device’s camera. This flaw undermines the security of IoT devices that rely on cloud-based PIN verification, potentially leading to privacy breaches and physical security risks. The vulnerability is currently unpatched, and no official fix has been released by ECOVACS.

Supply Chain & Package Security

This vulnerability is not related to NPM, PyPI, Go, or Ruby packages. It is a cloud service authentication flaw specific to ECOVACS IoT devices.

CVSS Breakdown & Threat Level

• CVSS Score: 0.0 (No official CVSS vector provided)
• Attack Vector (AV): Network (N)
• Attack Complexity (AC): Low (L)
• Privileges Required (PR): Low (L) – requires authentication to the cloud service
• User Interaction (UI): None (N)
• Scope (S): Unchanged (U)
• Confidentiality (C): High (H) – unauthorized access to live video
• Integrity (I): None (N)
• Availability (A): None (N)

Threat Level: High. The vulnerability allows unauthorized video surveillance, posing significant privacy and physical security risks.

Deep Dive & Mechanics

The vulnerability resides in the cloud service backend that mediates access to the live video feed of ECOVACS devices. When an authenticated user requests the video stream, the service enforces a PIN check. However, due to improper validation, an attacker can manipulate the request (e.g., by altering parameters or session tokens) to bypass the PIN requirement. This allows direct access to the video feed without the correct PIN.

The root cause is a failure to properly verify the PIN on the server side, likely due to a missing or flawed authorization check. The attacker must first authenticate to the cloud service (e.g., via compromised credentials or session hijacking), but once authenticated, they can bypass the additional PIN layer.

Vulnerable vs. Patched Code

No official patch is available. The vulnerable code is in the cloud service’s API endpoint that handles video feed requests. A patched version would include a server-side PIN verification step that cannot be bypassed by client-side manipulation.

Vulnerable Code (Conceptual):

@app.route('/api/video_feed')
def video_feed():
    user = authenticate(request)
    if not user:
        return "Unauthorized", 401
    # PIN check is missing or flawed
    # Attacker can bypass by omitting PIN parameter
    return stream_video(user)

Patched Code (Conceptual):

@app.route('/api/video_feed')
def video_feed():
    user = authenticate(request)
    if not user:
        return "Unauthorized", 401
    pin = request.args.get('pin')
    if not pin or not verify_pin(user, pin):
        return "Invalid PIN", 403
    return stream_video(user)

Exploitation & Lab Setup

Red Team

Prerequisites:

• Valid credentials for the ECOVACS cloud service (e.g., username/password or session token).
• Network access to the cloud service endpoint.

Exploitation Steps:

1. Authenticate to the ECOVACS cloud service and obtain a session token.
2. Identify the API endpoint for live video feed (e.g., /api/video_feed).
3. Send a request to the endpoint without the PIN parameter or with an invalid PIN.
4. If the server returns the video stream, the bypass is successful.

Proof-of-Concept (Python):

import requests

session = requests.Session()
# Authenticate (example)
login_data = {'username': 'attacker@example.com', 'password': 'password123'}
session.post('https://cloud.ecovacs.com/login', data=login_data)

# Bypass PIN check
response = session.get('https://cloud.ecovacs.com/api/video_feed')
if response.status_code == 200:
    print("Video feed accessed without PIN!")
else:
    print("Bypass failed")

Blue Team

Detection:

• Monitor for repeated failed PIN attempts followed by successful video feed access.
• Alert on requests to the video feed endpoint without a PIN parameter.
• Correlate with authentication logs to identify anomalous access patterns.

Mitigation:

• Implement server-side PIN verification that cannot be bypassed.
• Enforce rate limiting on video feed requests.
• Require multi-factor authentication for sensitive operations.

Indicators of Compromise (IOCs)

• Network: Unusual requests to /api/video_feed without PIN parameter.
• Logs: Authentication logs showing access to video feed without prior PIN validation.
• Device: Unauthorized video stream access from unknown IP addresses.

Detection Engineering

YARA Rule

rule CVE_2024_52327_ECOVACS_Bypass {
    meta:
        description = "Detects exploitation attempts of CVE-2024-52327"
        author = "Valters IT"
        date = "2025-04-10"
    strings:
        $s1 = "/api/video_feed" ascii wide nocase
        $s2 = "pin=" ascii wide nocase
    condition:
        $s1 and not $s2
}

Sigma Rule

title: ECOVACS Video Feed PIN Bypass
id: 8a9b7c6d-5e4f-3a2b-1c0d-9e8f7a6b5c4d
status: experimental
description: Detects requests to ECOVACS video feed endpoint without PIN parameter
author: Valters IT
date: 2025-04-10
logsource:
    category: webserver
    product: apache
detection:
    selection:
        cs-uri-query|contains: "/api/video_feed"
    filter:
        cs-uri-query|contains: "pin="
    condition: selection and not filter
falsepositives:
    - Legitimate requests with PIN parameter
level: high

Suricata Rule

alert http $HOME_NET any -> $EXTERNAL_NET any (
    msg:"CVE-2024-52327 ECOVACS Video Feed PIN Bypass";
    flow:to_server,established;
    content:"/api/video_feed"; http_uri;
    pcre:"/pin\=/I";
    sid:1000001;
    rev:1;
)

Remediation & Mitigation

• Immediate: Disable remote video feed access until a patch is available.
• Short-term: Implement additional authentication layers (e.g., MFA) for video feed access.
• Long-term: Apply server-side PIN verification and conduct a security audit of the cloud service.
• Workaround: Use local network access only and disable cloud-based video streaming.

Report generated by Valters IT DevSecOps & CTI Division