CVE-2022-33314
📋 TL;DR
CVE-2022-33314 is a critical command injection vulnerability in Robustel R1510 routers that allows remote attackers to execute arbitrary commands on affected devices. Attackers can exploit this by sending specially crafted requests to the /action/import_sdk_file/ API endpoint. Organizations using Robustel R1510 routers with internet-facing management interfaces are at highest risk.
💻 Affected Systems
- Robustel R1510 Industrial Cellular Router
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing attacker to install persistent backdoors, pivot to internal networks, intercept traffic, or use device as botnet node.
Likely Case
Unauthenticated remote code execution leading to device takeover, credential theft, and network reconnaissance.
If Mitigated
Limited impact if device is behind firewall with no internet exposure and proper network segmentation.
🎯 Exploit Status
Exploit details published in Talos Intelligence reports; simple HTTP request with command injection payload.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check with Robustel for updated firmware
Vendor Advisory: https://www.robustel.com/security-advisory/
Restart Required: Yes
Instructions:
1. Contact Robustel support for patched firmware. 2. Backup configuration. 3. Upload new firmware via web interface. 4. Reboot device. 5. Verify version update.
🔧 Temporary Workarounds
Network Access Control
linuxRestrict access to web management interface using firewall rules.
iptables -A INPUT -p tcp --dport 80 -s trusted_ip -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -s trusted_ip -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP
Disable Web Interface
linuxTemporarily disable web management if not required.
killall httpd
systemctl stop httpd
🧯 If You Can't Patch
- Isolate device in separate VLAN with strict firewall rules
- Implement network-based intrusion detection to monitor for exploit attempts
🔍 How to Verify
Check if Vulnerable:
Check if device responds to crafted requests at /action/import_sdk_file/ endpoint with command injection payloads.Check Version:
Check web interface System Status page or use Robustel management toolsVerify Fix Applied:
Test if command injection attempts are properly sanitized or blocked after patch.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /action/import_sdk_file/
- System command execution from web user
- Failed authentication attempts followed by API access
Network Indicators:
- HTTP requests containing shell metacharacters in parameters
- Unexpected outbound connections from router
SIEM Query:
source="router_logs" AND (uri="/action/import_sdk_file/" OR cmd="*;*" OR cmd="*|*" OR cmd="*`*" OR cmd="*$(*")