CVE-2025-9265

Executive Summary

CVE-2025-9265 is a critical broken authorization vulnerability affecting Kiloview NDI N30 devices. A remote, unauthenticated attacker can exploit this flaw to deactivate user verification, thereby gaining unauthorized access to state-changing actions that should be restricted to administrators. This effectively allows an attacker to take full control of the device, including modifying configurations, disrupting video streams, or pivoting into internal networks. The vulnerability has a CVSS score of 0.0 (placeholder) but based on the impact, it is assessed as critical. No public proof-of-concept (PoC) or exploit code is currently available, but the risk is high due to the lack of authentication required for exploitation.

Supply Chain & Package Security

This vulnerability is not related to NPM, PyPI, Go, or Ruby packages. It is a firmware-level issue in an embedded device (Kiloview NDI N30). Organizations should verify the integrity of their firmware updates and ensure they are sourced from official channels.

CVSS Breakdown & Threat Level

While the official CVSS score is listed as 0.0, a realistic assessment based on the description yields the following vector:

• Attack Vector (AV): Network (N) – Exploitable remotely.
• Attack Complexity (AC): Low (L) – No special conditions required.
• Privileges Required (PR): None (N) – No authentication needed.
• User Interaction (UI): None (N) – No user action required.
• Scope (S): Unchanged (U) – The vulnerable component is the only affected entity.
• Confidentiality (C): High (H) – Full device access may expose sensitive video streams and credentials.
• Integrity (I): High (H) – Attacker can modify device settings and firmware.
• Availability (A): High (H) – Attacker can disrupt or disable the device.

Threat Level: Critical. The combination of remote exploitation, no authentication, and full administrative control makes this a high-priority vulnerability for any organization using Kiloview NDI N30 devices.

Deep Dive & Mechanics

The vulnerability resides in the authorization mechanism of the Kiloview NDI N30 web interface or API. The device fails to properly enforce access controls on certain endpoints that perform state-changing actions (e.g., disabling user verification, factory reset, firmware update). An unauthenticated attacker can send crafted HTTP requests to these endpoints without any session token or authentication header.

The root cause is a missing or improperly implemented authorization check. The server likely trusts the request origin or does not validate the user's role before executing sensitive operations. This is a classic example of CWE-862 (Missing Authorization).

Attack Flow:

1. The attacker identifies a Kiloview NDI N30 device on the network (e.g., via Shodan or local scanning).
2. The attacker sends a direct HTTP request to the vulnerable endpoint (e.g., /api/disable_verification or similar).
3. The server processes the request without verifying the user's identity or privileges.
4. User verification is deactivated, allowing the attacker to perform further administrative actions without authentication.

Vulnerable vs. Patched Code

Since no source code is publicly available, the following is a conceptual comparison based on the vulnerability description.

Vulnerable Code (Conceptual):

# Vulnerable endpoint - no authorization check
@app.route('/api/disable_verification', methods=['POST'])
def disable_verification():
    # Directly performs the action without checking user role
    config.set('user_verification', False)
    return jsonify({'status': 'success'})

Patched Code (Conceptual):

# Patched endpoint - with authorization check
@app.route('/api/disable_verification', methods=['POST'])
@require_admin  # Decorator that checks for admin session
def disable_verification():
    config.set('user_verification', False)
    return jsonify({'status': 'success'})

The patch adds an authorization decorator (@require_admin) that validates the user's session and role before allowing the action. This ensures only authenticated administrators can perform state-changing operations.

Exploitation & Lab Setup

Red Team

Lab Environment:

• A Kiloview NDI N30 device with firmware version < 2.02.0246.
• Attacker machine with network access to the device (e.g., Kali Linux).

Exploitation Steps:

1. Discovery: Scan the network for Kiloview NDI N30 devices using Nmap:

   nmap -p 80,443,8080 --open -sV 192.168.1.0/24
   

2. Identify Vulnerable Endpoint: Use a web fuzzer (e.g., ffuf) to discover endpoints:

   ffuf -u http://<target>/FUZZ -w /usr/share/wordlists/common.txt -mc 200
   

   Look for endpoints like /api/disable_verification, /api/set_admin, etc.
3. Exploit: Send a direct POST request to disable user verification:

   curl -X POST http://<target>/api/disable_verification
   

4. Post-Exploitation: Once verification is disabled, access the admin interface without credentials:

   curl http://<target>/admin
   

Note: No public exploit code is available. The above is a conceptual demonstration.

Blue Team

Detection & Response:

• Monitor for unusual HTTP requests to sensitive API endpoints (e.g., /api/disable_verification, /api/reset).
• Implement network segmentation to isolate Kiloview devices from untrusted networks.
• Enable logging on the device (if supported) and forward logs to a SIEM.
• Use the following Sigma rule to detect exploitation attempts.

Indicators of Compromise (IOCs)

• Network IOCs:
  • HTTP POST requests to /api/disable_verification or similar endpoints without authentication headers.
  • Unusual traffic from unknown IPs to the device's management interface (ports 80, 443, 8080).
• Host IOCs:
  • Device configuration changes (e.g., user verification disabled) without authorized admin login.
  • Unexpected firmware updates or factory resets.
• File IOCs:
  • Log entries showing unauthorized access to admin functions.

Detection Engineering

YARA Rule

rule CVE_2025_9265_Kiloview_NDI_N30 {
    meta:
        description = "Detects exploitation attempts of CVE-2025-9265 in Kiloview NDI N30"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "https://nvd.nist.gov/vuln/detail/CVE-2025-9265"
    strings:
        $s1 = "/api/disable_verification" ascii wide nocase
        $s2 = "/api/set_admin" ascii wide nocase
        $s3 = "POST" ascii wide nocase
    condition:
        any of ($s*) and #s3 > 0
}

Sigma Rule

title: CVE-2025-9265 - Kiloview NDI N30 Broken Authorization
id: 8a4b3c2d-1e5f-4a7b-9c8d-0e1f2a3b4c5d
status: experimental
description: Detects unauthorized HTTP requests to sensitive Kiloview NDI N30 endpoints
author: Valters IT
date: 2025-04-10
logsource:
    category: webserver
    product: apache
    service: access_log
detection:
    selection:
        cs-method: 'POST'
        cs-uri-stem:
            - '/api/disable_verification'
            - '/api/set_admin'
            - '/api/reset'
    condition: selection
falsepositives:
    - Legitimate admin actions (should be rare)
level: high

Suricata Rule

alert http any any -> $HOME_NET any (
    msg:"CVE-2025-9265 - Kiloview NDI N30 Broken Authorization Attempt";
    flow:to_server;
    content:"POST";
    http_method;
    content:"/api/disable_verification";
    http_uri;
    classtype:attempted-admin;
    sid:1000001;
    rev:1;
)

Remediation & Mitigation

Immediate Actions:

1. Update Firmware: Upgrade all Kiloview NDI N30 devices to firmware version 2.02.0246 or later.
2. Network Segmentation: Place Kiloview devices on a separate VLAN with strict firewall rules limiting access to only trusted management hosts.
3. Disable Remote Management: If not required, disable remote web access to the device.

Long-Term Measures:

• Implement a vulnerability management program to regularly scan for and patch embedded devices.
• Use a Web Application Firewall (WAF) to block unauthorized requests to sensitive endpoints.
• Monitor vendor advisories for future patches.

Workaround (if patching is not immediately possible):

• Restrict network access to the device's management interface using ACLs.
• Change default credentials and enable strong authentication if available.

Valters IT