CVE-2019-17215
📋 TL;DR
V-Zug Combi-Steam MSLQ devices lack brute-force protection for authentication, allowing attackers to guess passwords through repeated attempts. This affects devices with Ethernet firmware before R07 and WLAN firmware before R05. The vulnerability enables unauthorized access to the device's administrative interface.
💻 Affected Systems
- V-Zug Combi-Steam MSLQ
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full device compromise allowing attacker to control steam/oven functions, access user data, or pivot to other network devices.
Likely Case
Unauthorized access to device settings and potential disruption of appliance functionality.
If Mitigated
Limited to failed login attempts logged, with no successful authentication possible.
🎯 Exploit Status
Simple brute-force tools can exploit this without authentication. No special knowledge required beyond network access.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Ethernet R07 or later, WLAN R05 or later
Vendor Advisory: https://vuldb.com/?id.140463
Restart Required: Yes
Instructions:
1. Contact V-Zug support for firmware updates. 2. Download appropriate firmware version. 3. Apply update via device management interface. 4. Reboot device.
🔧 Temporary Workarounds
Network Segmentation
allIsolate V-Zug devices on separate VLAN with strict firewall rules.
Strong Password Policy
allImplement complex, unique passwords that resist brute-force guessing.
🧯 If You Can't Patch
- Implement network-based brute-force detection and blocking
- Disable remote management if not required
🔍 How to Verify
Check if Vulnerable:
Check firmware version in device web interface: Settings > System InformationCheck Version:
No CLI command - check via web interface or contact vendorVerify Fix Applied:
Confirm firmware version shows Ethernet R07+ or WLAN R05+📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts from single IP
- Successful login after many failures
Network Indicators:
- High volume of HTTP POST requests to login endpoint
- Traffic patterns showing systematic password guessing
SIEM Query:
source="vzug-device" AND (event="login_failed" COUNT > 10 WITHIN 5min)