CVE-2023-48849
📋 TL;DR
CVE-2023-48849 is a critical remote code execution vulnerability affecting Ruijie EG Series Routers. Unauthenticated attackers can execute arbitrary code on affected devices due to insufficient input filtering. Organizations using Ruijie EG routers with vulnerable firmware are at risk.
💻 Affected Systems
- Ruijie EG Series Routers
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of router with persistent backdoor installation, network traffic interception, lateral movement to internal systems, and data exfiltration.
Likely Case
Router takeover leading to network disruption, credential theft, and deployment of malware or botnet clients.
If Mitigated
Limited impact with proper network segmentation and monitoring, potentially only affecting isolated router management interface.
🎯 Exploit Status
Public exploit code available on GitHub. Simple HTTP request triggers the vulnerability without authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: No
Instructions:
No official patch available. Check Ruijie vendor website for firmware updates. If unavailable, implement workarounds immediately.
🔧 Temporary Workarounds
Network Segmentation
allIsolate Ruijie routers from internet and restrict access to management interfaces
Access Control Lists
allImplement strict firewall rules to limit access to router management interfaces
🧯 If You Can't Patch
- Immediately disconnect vulnerable routers from internet-facing networks
- Implement network monitoring for suspicious traffic to router management interfaces
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via web interface or CLI. If version is EG_3.0(1)B11P216 or earlier, device is vulnerable.Check Version:
show version (via CLI) or check web interface System Information pageVerify Fix Applied:
No official fix available. Monitor for firmware updates from Ruijie vendor.📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP requests to router management interface
- Unexpected process execution in router logs
- Authentication bypass attempts
Network Indicators:
- Suspicious HTTP traffic to router management ports (typically 80/443)
- Unusual outbound connections from router
SIEM Query:
source_ip="router_ip" AND (http_method="POST" OR http_method="GET") AND uri_contains="/cgi-bin" AND status_code=200