CVE-2021-46422
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary operating system commands on Telesquare SDT-CW3B1 devices without authentication. Attackers can gain complete control of affected devices, potentially compromising network infrastructure. All users of SDT-CW3B1 version 1.1.0 are affected.
💻 Affected Systems
- Telesquare SDT-CW3B1
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device takeover leading to network compromise, data exfiltration, lateral movement, and persistent backdoor installation
Likely Case
Device compromise leading to credential theft, network reconnaissance, and potential ransomware deployment
If Mitigated
Limited impact if device is isolated, monitored, and has strict network controls
🎯 Exploit Status
Multiple public exploit scripts available, trivial to execute
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Contact Telesquare for updated firmware or consider device replacement.
🔧 Temporary Workarounds
Network Isolation
allPlace device behind firewall with strict inbound/outbound rules
Access Control
allRestrict network access to device management interface
🧯 If You Can't Patch
- Immediately remove device from internet-facing networks
- Implement strict network segmentation and monitor all traffic to/from device
🔍 How to Verify
Check if Vulnerable:
Check device firmware version via web interface or SSH. If version is 1.1.0, device is vulnerable.Check Version:
Check web interface or use vendor-specific CLI commandsVerify Fix Applied:
No fix available to verify. Consider device replacement with updated model.📡 Detection & Monitoring
Log Indicators:
- Unusual command execution patterns
- Multiple failed authentication attempts followed by successful access
- Suspicious process creation
Network Indicators:
- Unexpected outbound connections from device
- Traffic to known malicious IPs
- Unusual port scanning from device
SIEM Query:
source_ip=[device_ip] AND (event_type="command_execution" OR event_type="process_creation") AND command CONTAINS [suspicious_patterns]🔗 References
- http://packetstormsecurity.com/files/167201/SDT-CW3B1-1.1.0-Command-Injection.html
- http://packetstormsecurity.com/files/167387/Telesquare-SDT-CW3B1-1.1.0-Command-Injection.html
- https://drive.google.com/drive/folders/1YJlVlb4SlTEGONzIjiMwd2P7ucP_Pm7T?usp=sharing
- http://packetstormsecurity.com/files/167201/SDT-CW3B1-1.1.0-Command-Injection.html
- http://packetstormsecurity.com/files/167387/Telesquare-SDT-CW3B1-1.1.0-Command-Injection.html
- https://drive.google.com/drive/folders/1YJlVlb4SlTEGONzIjiMwd2P7ucP_Pm7T?usp=sharing
