CVE-2023-46423
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary commands on TOTOLINK X6000R routers via the sub_417094 function. Attackers can gain full control of affected devices without authentication. All users running the vulnerable firmware version are affected.
💻 Affected Systems
- TOTOLINK X6000R
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of router leading to network takeover, data exfiltration, malware deployment, and pivot to internal network devices.
Likely Case
Router compromise leading to DNS hijacking, credential theft, man-in-the-middle attacks, and botnet recruitment.
If Mitigated
Limited impact if device is behind firewall with strict inbound filtering and not internet-facing.
🎯 Exploit Status
Public GitHub repository contains technical details and likely exploit code. No authentication required for exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.totolink.cn/index.php/home/menu/detail.html?menu_listtpl=download&id=88&ids=36
Restart Required: Yes
Instructions:
1. Check vendor website for firmware updates. 2. Download latest firmware. 3. Upload via router admin interface. 4. Reboot router.
🔧 Temporary Workarounds
Network Isolation
allPlace router behind firewall with strict inbound filtering to block external access.
Access Restriction
allConfigure firewall to only allow management access from trusted IP addresses.
🧯 If You Can't Patch
- Replace vulnerable router with different model or vendor
- Implement network segmentation to isolate router from critical systems
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface. If version matches affected version, device is vulnerable.Check Version:
Login to router admin interface and check firmware version in System Status or similar section.Verify Fix Applied:
Verify firmware version has been updated to a version newer than v9.4.0cu.652_B20230116.📡 Detection & Monitoring
Log Indicators:
- Unusual command execution in router logs
- Unexpected system process creation
- Suspicious network traffic from router
Network Indicators:
- Unexpected outbound connections from router
- DNS queries to malicious domains
- Port scanning originating from router
SIEM Query:
source="router_logs" AND ("command injection" OR "exec" OR "system" OR suspicious_process_name)🔗 References
- https://github.com/XYIYM/Digging/blob/main/TOTOLINK/X6000R/4/1.md
- https://www.totolink.cn/index.php/home/menu/detail.html?menu_listtpl=download&id=88&ids=36
- https://github.com/XYIYM/Digging/blob/main/TOTOLINK/X6000R/4/1.md
- https://www.totolink.cn/index.php/home/menu/detail.html?menu_listtpl=download&id=88&ids=36
