CVE-2025-69929 Overview
A privilege escalation vulnerability exists in N3uron Web User Interface v.1.21.7-240207.1047 that allows a remote attacker to escalate privileges. The vulnerability stems from the implementation of password hashing on the client side using the MD5 algorithm over a predictable string format, enabling attackers to potentially compromise user authentication and gain unauthorized elevated access.
Critical Impact
Remote attackers can exploit weak client-side MD5 password hashing to escalate privileges and gain unauthorized access to the N3uron industrial automation platform.
Affected Products
- N3uron Web User Interface v.1.21.7-240207.1047
Discovery Timeline
- 2026-01-29 - CVE CVE-2025-69929 published to NVD
- 2026-01-29 - Last updated in NVD database
Technical Details for CVE-2025-69929
Vulnerability Analysis
This vulnerability represents a significant cryptographic weakness in the N3uron Web User Interface authentication mechanism. The application performs password hashing on the client side using the MD5 algorithm, which presents multiple security concerns. MD5 is a cryptographically broken hash function that has been deprecated for security purposes due to its susceptibility to collision attacks and rainbow table lookups.
The implementation compounds this weakness by using a predictable string format for the hash input. When password hashing occurs client-side with a predictable format, attackers can observe the authentication process, reverse-engineer the hashing scheme, and potentially craft valid authentication tokens or bypass authentication entirely.
N3uron is an industrial automation and IIoT platform commonly used in operational technology (OT) environments, making this vulnerability particularly concerning for critical infrastructure security.
Root Cause
The root cause of this vulnerability is the use of cryptographically weak MD5 hashing combined with client-side password processing and a predictable string format. Modern authentication systems should:
- Use strong hashing algorithms such as bcrypt, scrypt, or Argon2
- Perform all password hashing server-side
- Implement random salts to prevent predictability
- Never expose hashing logic to client-side code where it can be inspected and exploited
Attack Vector
An attacker with network access to the N3uron Web User Interface can exploit this vulnerability through the following approach:
- Intercept Authentication Traffic - Monitor network communications to observe the client-side hashing process
- Analyze Hashing Implementation - Inspect client-side JavaScript to understand the predictable string format used for MD5 hashing
- Generate Valid Hashes - Using the predictable format and MD5 algorithm, craft authentication credentials
- Escalate Privileges - Leverage the weak authentication to gain elevated access within the N3uron platform
The vulnerability mechanism relies on the exposure of hashing logic in client-side code. For technical details and proof-of-concept information, refer to the GitHub Gist Security Code published by the security researcher.
Detection Methods for CVE-2025-69929
Indicators of Compromise
- Unusual authentication attempts or patterns against the N3uron Web User Interface
- Multiple failed login attempts followed by successful authentication from the same source
- Authentication requests with abnormal MD5 hash patterns or timing anomalies
- Unexpected privilege changes or user account modifications within the N3uron platform
Detection Strategies
- Monitor network traffic for anomalous authentication patterns targeting N3uron web interfaces
- Implement web application firewall (WAF) rules to detect authentication bypass attempts
- Enable verbose logging on the N3uron Web User Interface to capture authentication events
- Deploy behavioral analysis to identify privilege escalation patterns within the application
Monitoring Recommendations
- Configure alerts for failed authentication attempts against N3uron systems
- Monitor for unauthorized configuration changes within the N3uron platform
- Implement network segmentation monitoring for OT/IIoT environments
- Review access logs regularly for signs of privilege escalation or unauthorized access
How to Mitigate CVE-2025-69929
Immediate Actions Required
- Restrict network access to the N3uron Web User Interface to trusted networks and IP addresses only
- Implement additional authentication layers such as VPN or multi-factor authentication (MFA)
- Place the N3uron system behind a reverse proxy with additional security controls
- Monitor for any signs of exploitation while awaiting an official patch
Patch Information
No vendor patch information is currently available for this vulnerability. Organizations should monitor the N3uron Platform website for security updates and patch releases. Contact N3uron support directly for guidance on remediation timelines and interim security measures.
Workarounds
- Isolate the N3uron Web User Interface from untrusted networks using firewall rules and network segmentation
- Implement IP-based access controls to limit who can reach the authentication interface
- Deploy a reverse proxy with strong authentication to protect the vulnerable endpoint
- Consider disabling the web interface if not operationally required until a patch is available
# Example firewall configuration to restrict N3uron Web UI access
# Restrict access to trusted management network only
iptables -A INPUT -p tcp --dport 443 -s 10.0.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP
# Alternative: Use network segmentation for OT environments
# Place N3uron systems in isolated VLAN with controlled access points
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
