CVE-2019-12780
📋 TL;DR
This vulnerability allows unauthenticated remote attackers to execute arbitrary commands on Belkin Wemo-enabled Crock-Pot devices via command injection in the UPnP API. Attackers can send specially crafted POST requests to trigger the exploit. All users of affected Belkin Wemo Crock-Pot devices are at risk.
💻 Affected Systems
- Belkin Wemo Enabled Crock-Pot
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing attackers to execute arbitrary commands, potentially gaining persistent access, modifying device functionality, or using the device as a pivot point into the network.
Likely Case
Attackers execute commands to disrupt device operation, install malware, or use the device for botnet participation.
If Mitigated
Limited impact with proper network segmentation and access controls preventing external exploitation.
🎯 Exploit Status
Simple POST request with command injection payload required. Exploit code publicly available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Firmware updates released by Belkin
Vendor Advisory: https://www.belkin.com/us/support-article?articleNum=48726
Restart Required: Yes
Instructions:
1. Access Wemo app or web interface. 2. Check for firmware updates. 3. Apply available updates. 4. Restart device after update.
🔧 Temporary Workarounds
Network Segmentation
allIsolate IoT devices on separate VLAN or network segment
Disable UPnP
allDisable Universal Plug and Play if not required
🧯 If You Can't Patch
- Disconnect device from network entirely
- Implement strict firewall rules blocking all external access to device
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against patched versions in vendor advisory. Test with controlled exploit attempt in isolated environment.Check Version:
Check via Wemo app or web interface for firmware versionVerify Fix Applied:
Verify firmware version matches patched version. Attempt exploit in controlled environment to confirm failure.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /upnp/control/basicevent1
- Commands with shell metacharacters in SmartDevURL parameter
Network Indicators:
- POST requests to device on port 49152 with command injection payloads
- Unusual outbound connections from IoT device
SIEM Query:
source="network_device" AND dest_port=49152 AND http_method="POST" AND uri="/upnp/control/basicevent1" AND (payload CONTAINS "||" OR payload CONTAINS ";" OR payload CONTAINS "`")