CVE-2022-27270
📋 TL;DR
CVE-2022-27270 is a remote code execution vulnerability in InHand Networks InRouter 900 Industrial 4G Routers that allows attackers to execute arbitrary commands via crafted packets to the ipsec_secrets component. This affects organizations using these routers in industrial environments, potentially compromising network security and device control. The vulnerability requires no authentication and has a critical CVSS score of 9.8.
💻 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 the router allowing attackers to pivot to internal networks, intercept/modify traffic, install persistent backdoors, or disable critical industrial communications.
Likely Case
Router compromise leading to network disruption, data interception, or use as a foothold for further attacks on connected industrial systems.
If Mitigated
Limited impact if routers are behind firewalls with strict ingress filtering and network segmentation prevents lateral movement.
🎯 Exploit Status
Public proof-of-concept exists in GitHub repositories. The vulnerability requires sending crafted packets to the vulnerable component.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v1.0.0.r11700 and later
Vendor Advisory: https://www.inhandnetworks.com/support/security-advisory.html
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
Disable IPSec functionality
allTemporarily disable IPSec services if not required for operations
# Via web interface: Navigate to VPN > IPSec and disable all tunnels
Network segmentation and filtering
linuxIsolate routers and restrict access to management interfaces
# Firewall rule example: iptables -A INPUT -p tcp --dport [router_ports] -j DROP
🧯 If You Can't Patch
- Segment routers in isolated VLANs with strict firewall rules blocking unnecessary inbound traffic
- Implement network monitoring for suspicious traffic patterns to/from router management interfaces
🔍 How to Verify
Check if Vulnerable:
Check firmware version via web interface (System > Status) or CLI command 'show version'Check Version:
show versionVerify Fix Applied:
Confirm firmware version is v1.0.0.r11700 or higher and test IPSec functionality remains operational📡 Detection & Monitoring
Log Indicators:
- Unusual IPSec connection attempts
- Failed authentication attempts to router services
- Unexpected configuration changes
Network Indicators:
- Crafted packets to router IPSec ports
- Unusual outbound connections from router
- Traffic patterns suggesting command execution
SIEM Query:
source_ip="router_ip" AND (event_type="config_change" OR event_type="failed_auth" OR port=500 OR port=4500)🔗 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
