CVE-2018-15477
📋 TL;DR
CVE-2018-15477 is a command injection vulnerability in myStrom WiFi Switch V1 devices where malicious cloud servers could execute arbitrary operating system commands on the device. This affects myStrom WiFi Switch V1 devices running firmware versions before 2.66. The vulnerability allows remote code execution with high privileges.
💻 Affected Systems
- myStrom WiFi Switch V1
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing attackers to install persistent malware, pivot to internal networks, or brick devices.
Likely Case
Attackers controlling malicious cloud servers could execute commands to steal data, modify device behavior, or use devices as botnet nodes.
If Mitigated
With proper network segmentation and updated firmware, impact is limited to isolated device compromise.
🎯 Exploit Status
Exploitation requires control of cloud servers that communicate with devices. Public details available in Swisscom bug bounty report.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.66 and later
Vendor Advisory: https://www.swisscom.ch/content/dam/swisscom/de/about/nachhaltigkeit/digitale-schweiz/sicherheit/bug-bounty/files/cve-2018-15476ff.txt
Restart Required: Yes
Instructions:
1. Access device web interface or mobile app. 2. Check for firmware updates. 3. Apply firmware version 2.66 or later. 4. Reboot device after update.
🔧 Temporary Workarounds
Disable Cloud Connectivity
allPrevent device from communicating with external cloud servers to block exploitation vector.
Configure device to use local-only mode if supported
Network Segmentation
allIsolate IoT devices on separate VLAN to limit lateral movement if compromised.
🧯 If You Can't Patch
- Replace vulnerable devices with updated models or alternative products
- Implement strict network firewall rules to block all outbound traffic from devices
🔍 How to Verify
Check if Vulnerable:
Check firmware version via device web interface or mobile app. If version is below 2.66, device is vulnerable.Check Version:
Check via device web interface at http://[device-ip]/api/v1/device or mobile appVerify Fix Applied:
Confirm firmware version is 2.66 or higher after update. Test cloud connectivity to ensure functionality remains.📡 Detection & Monitoring
Log Indicators:
- Unusual command execution in system logs
- Unexpected process creation
- Abnormal cloud server connections
Network Indicators:
- Suspicious outbound connections from IoT devices
- Unexpected command and control traffic
SIEM Query:
source="iot-device" AND (event_type="command_execution" OR process_name NOT IN ["normal_processes"])