Affected Product: Intelbras CFTV IP NVD 9032
Vendor: Intelbras
Vulnerability Class: Authentication Bypass / MFA Bypass
Impact: Full Administrator Account Takeover
Attack Vector: Remote (Network)
Authentication Required: No
User Interaction: None
CVSS v3.1 Score: 9.8
Severity: Critical
Exploitability: High
Exploit Availability: Practical exploitation possible using standard HTTP requests (educational and research context only)
Vulnerability Overview
CVE-2025-67070 is a critical security flaw in the Intelbras CFTV IP NVD 9032 network video recorder. The issue resides in the device’s password recovery functionality, where Multi-Factor Authentication (MFA) is not properly enforced on the server side.
Although the product advertises MFA protection for administrative actions, the password recovery endpoint processes reset requests without validating the MFA challenge. This allows an unauthenticated remote attacker to reset the administrator password and gain full control of the device.
The vulnerability does not rely on brute force, credential guessing, or user interaction. Any attacker with network access to the management interface can exploit it.
Root Cause Analysis
The root cause is a logic flaw in the backend authentication workflow:
- The password recovery endpoint accepts password reset requests without verifying the MFA token.
- MFA validation is either performed only on the client side or skipped entirely under certain request conditions.
- The server trusts user-supplied parameters and proceeds with password changes even when MFA data is missing, empty, or malformed.
This results in a complete bypass of the second authentication factor.
Exploitation Details (Educational)
An attacker can exploit this vulnerability by directly interacting with the device’s password recovery API.
High-level exploitation flow:
- Identify an accessible Intelbras NVD 9032 device on the network.
- Send a crafted HTTP request to the password recovery endpoint.
- Specify the administrator account and a new password.
- Omit the MFA token or submit an invalid value.
- The device accepts the request and updates the admin password.
- The attacker logs in using the new credentials.
No authentication session, MFA confirmation, or prior access is required.
This exploit is reliable and repeatable on vulnerable firmware versions.
Indicators of Compromise
Organizations should consider a device potentially compromised if any of the following are observed:
- Administrator password changed without a corresponding MFA challenge
- Password recovery events without prior login attempts
- Administrative logins immediately following a password reset
- Configuration changes, camera disablement, or firmware modifications without authorization
- Access attempts originating from unfamiliar IP addresses
Detection Strategy
Recommended Log Sources
- NVD 9032 system logs
- Authentication and user management logs
- Web interface or API access logs
- Network firewall or reverse proxy logs
What to Look For
- Requests to password recovery endpoints
- Password reset actions where MFA fields are empty or missing
- Password recovery requests coming from non-management networks
- Multiple recovery attempts in a short time window
WAF Detection and Prevention Rules
The following WAF rules are conceptual and should be adapted to your specific environment. They are written to help defenders understand what to block or alert on.
Rule 1: Block Password Recovery Without MFA Parameter
Condition:
- HTTP method is POST
- Request URI contains password recovery endpoint
- MFA parameter is missing or empty
Action:
- Block request
- Log as high-severity security event
Example logic:
IF request.method == POST
AND request.uri CONTAINS "/password_recovery"
AND (mfa_token IS NULL OR mfa_token == "")
THEN BLOCK
Rule 2: Restrict Password Recovery to Trusted IPs
Condition:
- Request targets password recovery endpoint
- Source IP not in approved management network range
Action:
- Block or challenge request
Example logic:
IF request.uri CONTAINS "/password_recovery"
AND source.ip NOT IN trusted_admin_ips
THEN BLOCK
Rule 3: Rate Limit Password Recovery Attempts
Condition:
- Multiple password recovery requests from same IP within short timeframe
Action:
- Temporarily block IP
- Generate alert
Example logic:
IF count(password_recovery_requests FROM source.ip) > threshold
WITHIN time_window
THEN BLOCK source.ip
SIEM Correlation Use Case
A strong detection use case combines multiple events:
- Password recovery event for admin account
- No corresponding MFA verification event
- Successful admin login within minutes
This correlation should be treated as a confirmed compromise.
MITRE ATT&CK Mapping
- T1190 – Exploit Public-Facing Application
- T1556 – Modify Authentication Process
- T1078 – Valid Accounts
- T1565 – Data Manipulation
Business and Security Impact
Successful exploitation allows an attacker to:
- View, modify, or delete surveillance footage
- Disable cameras or recording functions
- Create or remove user accounts
- Establish persistence through configuration changes
- Use the device as a pivot point into internal networks
Because NVR devices often operate continuously with limited monitoring, attackers may retain access for extended periods.
Remediation and Patch Information
This vulnerability cannot be mitigated reliably through configuration changes alone. Firmware update is required.
Official Patch / Firmware Upgrade Link:
https://www.intelbras.com/pt-br/atualizacao-nvd-9032
Final Takeaway
CVE-2025-67070 represents a high-risk scenario due to the combination of remote access, no authentication requirement, and full administrative impact. Any unpatched Intelbras NVD 9032 device should be treated as exposed and prioritized for immediate upgrade and monitoring.
