CVE-2022-27274
📋 TL;DR
CVE-2022-27274 is a critical remote code execution vulnerability in InHand Networks InRouter 900 Industrial 4G Routers. Attackers can execute arbitrary code on affected devices by sending specially crafted packets to the vulnerable function sub_12028. Organizations using these routers in industrial or critical infrastructure environments are at risk.
💻 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 router allowing persistent backdoor installation, network traffic interception, lateral movement to connected industrial systems, and disruption of critical operations.
Likely Case
Router takeover leading to network monitoring, credential theft, denial of service, and potential access to 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 exists in GitHub repositories and PDF documentation. The vulnerability requires sending crafted packets to the vulnerable function.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v1.0.0.r11700 and later
Vendor Advisory: Not provided in references, check InHand Networks official website
Restart Required: Yes
Instructions:
1. Download firmware v1.0.0.r11700 or later from InHand Networks support portal. 2. Backup current configuration. 3. Upload new firmware via web interface. 4. Apply configuration backup. 5. Verify successful update.
🔧 Temporary Workarounds
Network Segmentation
allIsolate InRouter 900 devices in dedicated network segments with strict firewall rules
Access Control Lists
allImplement strict ACLs to limit which IP addresses can communicate with router management interfaces
🧯 If You Can't Patch
- Immediately remove internet-facing access and place behind VPN with strict authentication
- Implement network monitoring for anomalous traffic patterns and connection attempts to router services
🔍 How to Verify
Check if Vulnerable:
Check router firmware version via web interface or CLI. If version is below v1.0.0.r11700, device is vulnerable.Check Version:
Login to router web interface and check System Information, or use CLI command: show versionVerify Fix Applied:
Confirm firmware version is v1.0.0.r11700 or higher after update.📡 Detection & Monitoring
Log Indicators:
- Unusual connection attempts to router services
- Unexpected process execution
- Configuration changes not initiated by administrators
Network Indicators:
- Anomalous packet patterns to router management interfaces
- Unexpected outbound connections from router
- Traffic to known malicious IPs from router
SIEM Query:
source="router_logs" AND (event_type="connection_attempt" OR event_type="process_execution") AND severity=HIGH🔗 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
