CVE-2022-27272
📋 TL;DR
CVE-2022-27272 is a remote code execution vulnerability in InHand Networks InRouter 900 Industrial 4G Router that allows attackers to execute arbitrary commands via crafted network packets. This affects organizations using these routers in industrial environments, potentially compromising critical infrastructure. The vulnerability exists in the function sub_1791C and requires no 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 the router allowing attackers to pivot to internal networks, disrupt industrial operations, install persistent backdoors, or use the device for botnet participation.
Likely Case
Router compromise leading to network disruption, data interception, or use as a foothold for lateral movement within industrial control systems.
If Mitigated
Limited impact if routers are behind firewalls with strict network segmentation and packet filtering, though the vulnerability remains present.
🎯 Exploit Status
Public proof-of-concept exists in GitHub repositories. The vulnerability requires no authentication and can be triggered via network packets.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v1.0.0.r11700 and later
Vendor Advisory: Not provided in references
Restart Required: Yes
Instructions:
1. Download firmware version v1.0.0.r11700 or later from InHand Networks support portal. 2. Log into router web interface. 3. Navigate to System > Firmware Upgrade. 4. Upload the new firmware file. 5. Wait for upgrade to complete and router to reboot.
🔧 Temporary Workarounds
Network Segmentation
allIsolate InRouter 900 devices in separate VLANs with strict firewall rules to limit network exposure.
Access Control Lists
allImplement ACLs to restrict which IP addresses can communicate with the router management interfaces.
🧯 If You Can't Patch
- Deploy network intrusion detection systems to monitor for exploit attempts and anomalous traffic patterns.
- Implement strict outbound filtering to prevent compromised routers from communicating with attacker command-and-control servers.
🔍 How to Verify
Check if Vulnerable:
Check firmware version via web interface: System > Status > Firmware Version. If version is below v1.0.0.r11700, the device is vulnerable.Check Version:
No CLI command available. Use web interface at System > Status > Firmware Version.Verify Fix Applied:
After patching, verify firmware version shows v1.0.0.r11700 or higher in System > Status > Firmware Version.📡 Detection & Monitoring
Log Indicators:
- Unusual process execution in system logs
- Unexpected firmware modification attempts
- Abnormal network traffic patterns from router
Network Indicators:
- Crafted packets targeting router management ports
- Unusual outbound connections from router to unknown IPs
- Traffic patterns matching known exploit signatures
SIEM Query:
source="router_logs" AND (event_type="process_execution" AND process_name NOT IN ("normal_processes")) OR (event_type="firmware_change")🔗 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
