CVE-2022-27276
📋 TL;DR
CVE-2022-27276 is a remote code execution vulnerability in InHand Networks InRouter 900 Industrial 4G Router that allows attackers to execute arbitrary code via crafted network packets. This affects organizations using these industrial routers in critical infrastructure, manufacturing, or remote operations. Attackers can gain complete control of affected devices without authentication.
💻 Affected Systems
- InHand Networks InRouter 900 Industrial 4G Router
📦 What is this software?
Inrouter 900 Firmware by Inhandnetworks
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of industrial router allowing attackers to intercept/modify network traffic, pivot to internal networks, disrupt industrial operations, or deploy ransomware/malware.
Likely Case
Router compromise leading to network eavesdropping, credential theft, and potential lateral movement into connected industrial control systems.
If Mitigated
Limited impact if routers are isolated in segmented networks with strict firewall rules and monitored for anomalous traffic.
🎯 Exploit Status
Public proof-of-concept available in GitHub repository; exploitation requires sending crafted packets to vulnerable service.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v1.0.0.r11700 and later
Vendor Advisory: Not publicly documented by vendor; information primarily from security researchers
Restart Required: Yes
Instructions:
1. Download latest firmware from InHand Networks support portal. 2. Backup current configuration. 3. Upload firmware via web interface. 4. Apply firmware update. 5. Restart router. 6. Restore configuration if needed.
🔧 Temporary Workarounds
Network Segmentation
allIsolate InRouter devices in separate VLANs with strict firewall rules limiting access to management interfaces.
Access Control Lists
allImplement IP-based restrictions to only allow management from trusted networks/addresses.
🧯 If You Can't Patch
- Deploy network-based intrusion detection systems to monitor for exploit attempts and anomalous traffic patterns
- Implement strict outbound firewall rules to prevent compromised routers from communicating with attacker C2 servers
🔍 How to Verify
Check if Vulnerable:
Check firmware version via web interface (System > System Info) or SSH connection; compare against v1.0.0.r11700.Check Version:
ssh admin@router-ip 'cat /etc/version' or check web interface at System > System InfoVerify Fix Applied:
Confirm firmware version is v1.0.0.r11700 or later in System Info page.📡 Detection & Monitoring
Log Indicators:
- Unusual process execution in system logs
- Failed authentication attempts followed by successful exploitation
- Unexpected service restarts
Network Indicators:
- Crafted packets to router management ports (typically 80, 443, 22)
- Unusual outbound connections from router to unknown IPs
- Anomalous traffic patterns from router
SIEM Query:
source="router-logs" AND (event_type="process_execution" AND process_name NOT IN ("normal_processes")) OR (dest_port IN (80,443,22) AND packet_size>threshold)🔗 References
- https://drive.google.com/drive/folders/1zJ2dGrKar-WTlYz13v1f0BIsoIm3aU0l?usp=sharing
- https://github.com/wu610777031/IoT_Hunter/blob/main/Inhand%20InRouter%20900%20Industrial%204G%20Router%20%20Vulnerabilities%28RCE%29.pdf
- https://drive.google.com/drive/folders/1zJ2dGrKar-WTlYz13v1f0BIsoIm3aU0l?usp=sharing
- https://github.com/wu610777031/IoT_Hunter/blob/main/Inhand%20InRouter%20900%20Industrial%204G%20Router%20%20Vulnerabilities%28RCE%29.pdf
