CVE-2024-39225
📋 TL;DR
This CVE describes a remote code execution vulnerability in multiple GL-iNet router models that allows attackers to bypass authentication mechanisms and execute arbitrary code. The vulnerability affects numerous GL-iNet router products running specific firmware versions. With a CVSS score of 9.8, this represents a critical security risk.
💻 Affected Systems
- AR750
- AR750S
- AR300M
- AR300M16
- MT300N-V2
- B1300
- MT1300
- SFT1200
- X750
- MT3000
- MT2500
- AXT1800
- AX1800
- A1300
- X300B
- XE300
- E750
- AP1300
- S1300
- XE3000
- X3000
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain complete control of affected routers, enabling them to intercept network traffic, deploy malware, pivot to internal networks, and establish persistent backdoors.
Likely Case
Attackers bypass authentication to access administrative interfaces and execute commands, potentially compromising router configuration and network security.
If Mitigated
With proper network segmentation and access controls, impact is limited to the router itself rather than entire networks.
🎯 Exploit Status
The GitHub reference provides technical details about bypassing login mechanisms, suggesting exploitation is straightforward.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific patched versions
Vendor Advisory: https://github.com/gl-inet/CVE-issues/blob/main/4.0.0/Bypass%20the%20login%20mechanism.md
Restart Required: Yes
Instructions:
1. Check current firmware version. 2. Visit GL-iNet support portal. 3. Download latest firmware for your model. 4. Upload via web interface. 5. Apply update and restart router.
🔧 Temporary Workarounds
Disable Remote Management
allDisable web interface access from WAN/Internet to prevent external exploitation
Network Segmentation
allPlace routers in isolated network segments with strict firewall rules
🧯 If You Can't Patch
- Implement strict network access controls to limit access to router management interfaces
- Monitor router logs for authentication bypass attempts and unusual administrative activity
🔍 How to Verify
Check if Vulnerable:
Check router web interface for firmware version and compare against affected versions listCheck Version:
Login to router web interface and check System > Firmware or similar sectionVerify Fix Applied:
Verify firmware version has been updated to a version not listed in affected versions📡 Detection & Monitoring
Log Indicators:
- Failed login attempts followed by successful administrative access
- Unusual command execution in system logs
- Authentication bypass patterns
Network Indicators:
- Unexpected administrative access to router interfaces
- Unusual outbound connections from router
SIEM Query:
source="router_logs" AND (event_type="auth_bypass" OR (failed_auth AND successful_auth within 1s))