CVE-2023-6928
📋 TL;DR
This vulnerability allows attackers to perform unlimited password guessing attacks against EuroTel ETL3100 devices, potentially gaining administrative access. Affected systems include EuroTel ETL3100 versions v01c01 and v01x37, which are industrial control system devices used in critical infrastructure.
💻 Affected Systems
- EuroTel ETL3100
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise allowing attackers to manipulate industrial processes, disrupt operations, or exfiltrate sensitive data from critical infrastructure systems.
Likely Case
Unauthorized administrative access leading to configuration changes, data theft, or disruption of industrial operations.
If Mitigated
Limited impact with proper network segmentation and access controls preventing external attackers from reaching vulnerable interfaces.
🎯 Exploit Status
Attack requires only network access to administrative interface and basic brute force tools.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: https://www.cisa.gov/news-events/ics-advisories/icsa-23-353-05
Restart Required: No
Instructions:
No official patch available. Follow CISA advisory recommendations for mitigation.
🔧 Temporary Workarounds
Network Segmentation
allIsolate ETL3100 devices from untrusted networks and internet
Access Control Lists
allImplement firewall rules to restrict access to administrative interfaces
🧯 If You Can't Patch
- Implement strong password policies and change default credentials
- Monitor authentication logs for brute force attempts and implement account lockout policies
🔍 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 consult device documentation for version check commandVerify Fix Applied:
No patch available. Verify workarounds are implemented by testing network isolation and access controls.📡 Detection & Monitoring
Log Indicators:
- Multiple failed authentication attempts from single IP
- Successful logins from unusual locations or times
Network Indicators:
- High volume of HTTP/HTTPS requests to administrative port
- Traffic patterns consistent with brute force tools
SIEM Query:
source_ip=* AND (event_type="authentication_failure" OR event_type="login_failed") AND count > 10 within 5 minutes