CVE-2024-37662
📋 TL;DR
This vulnerability allows attackers on the same wireless network to disrupt or hijack TCP connections by sending forged TCP RST packets to the router. The router improperly handles these packets, causing it to remove NAT mappings and disconnect victims from remote servers. Anyone using the affected TP-LINK router with vulnerable firmware is at risk.
💻 Affected Systems
- TP-LINK TL-7DR5130
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could persistently disconnect victims from critical services (banking, email, VPN) or hijack sessions to steal credentials and sensitive data.
Likely Case
Intermittent connection drops and service disruptions for users on the affected network, potentially causing productivity loss.
If Mitigated
With proper network segmentation and monitoring, impact is limited to temporary connection issues for affected devices.
🎯 Exploit Status
The attack requires only basic network tools to craft and send TCP RST packets. No authentication or special privileges needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Not available
Restart Required: Yes
Instructions:
1. Check TP-LINK website for firmware updates. 2. Download latest firmware for TL-7DR5130. 3. Access router admin interface. 4. Navigate to System Tools > Firmware Upgrade. 5. Upload and install new firmware. 6. Reboot router.
🔧 Temporary Workarounds
Enable MAC filtering
allRestrict WLAN access to known devices only to prevent unauthorized attackers from joining the network.
Use WPA3 encryption
allUpgrade wireless security to WPA3 if supported to make network access more difficult for attackers.
🧯 If You Can't Patch
- Segment critical devices onto separate VLANs or physical networks
- Monitor for unusual TCP RST traffic patterns and implement network intrusion detection
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface. If version is exactly v1.0.23, the device is vulnerable.Check Version:
Login to router admin interface and navigate to System Tools > Firmware Upgrade to view current version.Verify Fix Applied:
After updating firmware, verify the version has changed from v1.0.23 to a newer version.📡 Detection & Monitoring
Log Indicators:
- Unusual TCP connection resets
- Multiple TCP RST packets from internal sources
- NAT table flushes
Network Indicators:
- Spoofed TCP RST packets with valid sequence numbers
- Unusual TCP traffic patterns from single internal source
SIEM Query:
source.ip IN internal_network AND tcp.flags.reset = 1 AND count() > threshold GROUP BY dest.ip