CVE-2024-7755
📋 TL;DR
The EWON FLEXY 202 industrial router transmits credentials using base64 encoding, which provides no real security. An attacker on the same network can intercept and easily decode these credentials to gain unauthorized access. This affects all organizations using vulnerable EWON FLEXY 202 devices.
💻 Affected Systems
- EWON FLEXY 202
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Full compromise of industrial control systems, unauthorized access to critical infrastructure, potential manipulation of industrial processes, and lateral movement to other network segments.
Likely Case
Credential theft leading to unauthorized access to the EWON device, potential configuration changes, and monitoring of industrial network traffic.
If Mitigated
Limited impact due to network segmentation and monitoring, with attackers only able to capture credentials but not use them effectively.
🎯 Exploit Status
Exploitation requires network access to sniff traffic but is trivial once credentials are captured.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific patched version
Vendor Advisory: https://www.cisa.gov/news-events/ics-advisories/icsa-24-291-04
Restart Required: Yes
Instructions:
1. Check vendor advisory for latest firmware version. 2. Download firmware update from vendor portal. 3. Apply firmware update following vendor instructions. 4. Restart device to complete installation.
🔧 Temporary Workarounds
Network Segmentation
allIsolate EWON devices in separate VLANs with strict access controls
Encrypted Communication
allForce all communication with EWON devices through VPN or encrypted tunnels
🧯 If You Can't Patch
- Implement strict network segmentation to limit attack surface
- Deploy network monitoring and IDS/IPS to detect credential sniffing attempts
🔍 How to Verify
Check if Vulnerable:
Check if EWON FLEXY 202 transmits credentials in base64 format by capturing network traffic during authenticationCheck Version:
Check device web interface or console for firmware version informationVerify Fix Applied:
Verify firmware version matches patched version from vendor advisory and test that credentials are no longer transmitted in base64📡 Detection & Monitoring
Log Indicators:
- Failed authentication attempts from unexpected IPs
- Configuration changes to EWON devices
Network Indicators:
- Base64 encoded credentials in network traffic
- Unusual traffic patterns to/from EWON devices
SIEM Query:
source="ewon_flexy" AND (event_type="authentication" OR event_type="configuration_change")