CVE-2023-27229
📋 TL;DR
This CVE describes a command injection vulnerability in TOTOlink A7100RU routers that allows attackers to execute arbitrary commands on the device. Attackers can exploit this by sending specially crafted requests to the /setting/setWanIeCfg endpoint. All users running the affected firmware version are vulnerable.
💻 Affected Systems
- TOTOlink A7100RU
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the router leading to network takeover, data interception, malware deployment, and lateral movement into connected networks.
Likely Case
Router compromise allowing attackers to modify network settings, intercept traffic, or use the device as a foothold for further attacks.
If Mitigated
Limited impact if the router is behind a firewall with strict inbound filtering and network segmentation.
🎯 Exploit Status
The GitHub references contain exploit details, and command injection vulnerabilities are commonly weaponized due to their simplicity and impact.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: No
Instructions:
Check TOTOlink's official website or contact vendor support for firmware updates. No specific patching instructions are available at this time.
🔧 Temporary Workarounds
Network Access Control
allRestrict access to the router's management interface using firewall rules
Disable WAN Management
allIf possible, disable remote management from the WAN interface
🧯 If You Can't Patch
- Replace the vulnerable router with a different model or vendor
- Segment the network to isolate the router from critical systems
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in web interface or via SSH if available. Version V7.4cu.2313_B20191024 is vulnerable.Check Version:
Check router web interface at System Status or similar menuVerify Fix Applied:
Verify firmware has been updated to a version newer than V7.4cu.2313_B20191024📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /setting/setWanIeCfg
- Suspicious command execution in system logs
- Multiple failed login attempts followed by successful access
Network Indicators:
- Unusual outbound connections from router
- Traffic to unexpected destinations
- Port scans originating from router
SIEM Query:
source="router_logs" AND (uri="/setting/setWanIeCfg" OR command="*;*" OR command="*|*" OR command="*`*")