CVE-2021-45814
📋 TL;DR
CVE-2021-45814 is a critical SQL injection vulnerability in Nettmp NNT 5.1 that allows attackers to bypass authentication and gain administrative access to the system. This affects all organizations using the vulnerable version of Nettmp NNT software. Attackers can exploit this to take full control of affected systems.
💻 Affected Systems
- Nettmp NNT
📦 What is this software?
Nnt by Nettemp
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with administrative privileges, allowing data theft, system manipulation, and potential lateral movement to other systems.
Likely Case
Unauthorized administrative access leading to data exfiltration, configuration changes, and installation of backdoors or malware.
If Mitigated
Limited impact with proper network segmentation, strong authentication controls, and regular monitoring in place.
🎯 Exploit Status
Public exploit code is available, making this easily exploitable by attackers with basic skills.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified
Vendor Advisory: Not found in provided references
Restart Required: No
Instructions:
1. Check vendor website for security updates
2. Apply any available patches immediately
3. If no patch exists, implement workarounds and consider alternative solutions
🔧 Temporary Workarounds
Web Application Firewall (WAF)
allDeploy a WAF with SQL injection protection rules to block exploitation attempts
Network Segmentation
allRestrict access to Nettmp NNT panel to only trusted IP addresses/networks
🧯 If You Can't Patch
- Isolate the system from the internet and restrict internal access
- Implement additional authentication layers and monitor for suspicious activity
🔍 How to Verify
Check if Vulnerable:
Check if running Nettmp NNT version 5.1. Review authentication logs for SQL injection patterns.Check Version:
Check application version in admin panel or configuration filesVerify Fix Applied:
Test authentication bypass attempts after implementing controls. Verify no unauthorized administrative access is possible.📡 Detection & Monitoring
Log Indicators:
- SQL syntax errors in authentication logs
- Multiple failed login attempts followed by successful admin login from unusual IP
- Unusual database queries in application logs
Network Indicators:
- SQL injection patterns in HTTP requests to authentication endpoints
- Unusual traffic to admin panel from external sources
SIEM Query:
source="*nettmp*" AND ("sql" OR "injection" OR "union select" OR "' OR '1'='1")🔗 References
- http://packetstormsecurity.com/files/165438/Nettmp-NNT-5.1-SQL-Injection.html
- https://drive.google.com/file/d/1-WiC1RDbcUqNB5sYd2h2n4rcU873s3gM/view?usp=sharing
- https://drive.google.com/file/d/1WS_pa2PzLS1EplBu7pjx7hXlyBwCepP9/view?usp=sharing
- http://packetstormsecurity.com/files/165438/Nettmp-NNT-5.1-SQL-Injection.html
- https://drive.google.com/file/d/1-WiC1RDbcUqNB5sYd2h2n4rcU873s3gM/view?usp=sharing
- https://drive.google.com/file/d/1WS_pa2PzLS1EplBu7pjx7hXlyBwCepP9/view?usp=sharing
