CVE-2024-25343
📋 TL;DR
This vulnerability in Tenda N300 F3 routers allows attackers to bypass password policy enforcement and set weak passwords, potentially compromising router security. It affects users of Tenda N300 F3 routers who rely on the device's built-in password strength requirements.
💻 Affected Systems
- Tenda N300 F3
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain unauthorized access to router administration, reconfigure network settings, intercept traffic, or install malicious firmware.
Likely Case
Weak passwords are set, making the router vulnerable to brute-force attacks and unauthorized administrative access.
If Mitigated
With strong external authentication controls and network segmentation, impact is limited to potential policy bypass without actual compromise.
🎯 Exploit Status
Exploitation requires access to the router's administration interface but bypasses password policy checks.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: http://tenda.com
Restart Required: Yes
Instructions:
1. Check Tenda website for firmware updates. 2. Download latest firmware. 3. Access router admin panel. 4. Navigate to firmware upgrade section. 5. Upload and apply new firmware. 6. Reboot router.
🔧 Temporary Workarounds
Enforce External Password Policy
allManually enforce strong password requirements regardless of router policy
Disable Remote Administration
allPrevent external access to router administration interface
🧯 If You Can't Patch
- Implement network segmentation to isolate router management traffic
- Enable logging and monitoring for unauthorized configuration changes
🔍 How to Verify
Check if Vulnerable:
Attempt to set a weak password (e.g., 'password123') through the router's web interface. If accepted despite policy warnings, the device is vulnerable.Check Version:
Check router web interface under System Status or Firmware Version sectionVerify Fix Applied:
After patching, attempt to set a weak password. The system should properly enforce password policy and reject weak passwords.📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts followed by successful login with weak password
- Password change events with weak passwords
Network Indicators:
- Unusual administrative access patterns
- Traffic to router administration interface from unexpected sources
SIEM Query:
source="router_logs" AND (event="password_change" AND password_strength="weak")