CVE-2023-6930
📋 TL;DR
EuroTel ETL3100 devices running vulnerable firmware versions allow unauthenticated attackers to download configuration files and logs containing sensitive information. This can lead to authentication bypass, privilege escalation, and full system compromise. Organizations using affected EuroTel ETL3100 versions are at risk.
💻 Affected Systems
- EuroTel ETL3100
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise allowing attacker to take complete control of the device, potentially pivoting to other network systems, disrupting operations, or exfiltrating sensitive data.
Likely Case
Unauthenticated attackers download configuration files containing credentials and system information, enabling authentication bypass and privilege escalation on the device.
If Mitigated
With proper network segmentation and access controls, impact is limited to the isolated device, though sensitive information may still be exposed.
🎯 Exploit Status
Unauthenticated HTTP requests to specific endpoints can download configuration and log files. No authentication or special tools required.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.cisa.gov/news-events/ics-advisories/icsa-23-353-05
Restart Required: No
Instructions:
1. Contact EuroTel for firmware updates or mitigation guidance. 2. Monitor CISA advisory for patch availability. 3. Apply patches immediately when released.
🔧 Temporary Workarounds
Network Segmentation
allIsolate EuroTel ETL3100 devices from untrusted networks and internet access
Access Control Lists
allImplement strict firewall rules to limit access to device management interfaces
🧯 If You Can't Patch
- Remove devices from internet-facing networks immediately
- Implement network monitoring for unauthorized access attempts to device management interfaces
🔍 How to Verify
Check if Vulnerable:
Check device firmware version via web interface or console. If version is v01c01 or v01x37, device is vulnerable.Check Version:
Check via device web interface or console commands specific to EuroTel ETL3100Verify Fix Applied:
Verify firmware version has been updated to a version not listed as vulnerable. Test that configuration/log download endpoints require authentication.📡 Detection & Monitoring
Log Indicators:
- Unauthenticated HTTP requests to configuration/log endpoints
- Multiple failed authentication attempts followed by successful configuration access
Network Indicators:
- HTTP GET requests to device IP on management ports without authentication
- Unusual data transfers from device to external IPs
SIEM Query:
source_ip=* AND dest_ip=[device_ip] AND (uri_path CONTAINS "config" OR uri_path CONTAINS "log") AND http_method=GET AND auth_status="none"