CVE-2023-24795
📋 TL;DR
A command execution vulnerability in JHR-N916R router firmware allows attackers to execute arbitrary commands on affected devices, potentially gaining full control. This affects users of JHR-N916R routers with firmware version 21.11.1.1483 or earlier, exposing them to remote compromise.
💻 Affected Systems
- JHR-N916R router
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise leading to data theft, network disruption, or use as a botnet node.
Likely Case
Unauthorized access to router settings, data interception, or malware deployment.
If Mitigated
Limited impact if isolated or patched, but still poses risk if exposed.
🎯 Exploit Status
Exploit details are publicly available, making it easy for attackers to leverage.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
Check vendor website for firmware updates; if none, consider workarounds or replacement.
🔧 Temporary Workarounds
Network Isolation
allRestrict access to the router's management interface to trusted IPs only.
Configure firewall rules to block external access to router ports (e.g., 80, 443, 22).
Disable Unused Services
allTurn off unnecessary services on the router to reduce attack surface.
Access router admin panel and disable remote management, UPnP, or other non-essential features.
🧯 If You Can't Patch
- Replace the router with a model that receives security updates.
- Implement network segmentation to limit the router's exposure to critical systems.
🔍 How to Verify
Check if Vulnerable:
Access router admin interface and check firmware version; if <=21.11.1.1483, it is vulnerable.Check Version:
Log into router web interface and navigate to system info or use CLI command if supported (e.g., 'show version').Verify Fix Applied:
Update firmware if available and confirm version is >21.11.1.1483.📡 Detection & Monitoring
Log Indicators:
- Unusual command execution logs, unexpected configuration changes, or failed login attempts.
Network Indicators:
- Suspicious traffic to router management ports from untrusted sources.
SIEM Query:
Example: 'source_ip:external AND dest_port:80 AND event:command_execution'