CVE-2023-29125
📋 TL;DR
CVE-2023-29125 is a heap buffer overflow vulnerability in TCP port 7700 services that allows remote attackers to execute arbitrary code or cause denial of service by sending a specially crafted packet. This affects systems running vulnerable versions of Enel X Waybox 3 charging station management software. The high CVSS score indicates significant potential impact.
💻 Affected Systems
- Enel X Waybox 3
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, or disruption of electric vehicle charging infrastructure
Likely Case
Denial of service affecting charging station availability and management functionality
If Mitigated
Limited impact with proper network segmentation and access controls preventing exploitation
🎯 Exploit Status
Exploitation requires sending crafted packets to TCP port 7700, no authentication needed
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to Enel X security bulletin for specific patched versions
Vendor Advisory: https://support-emobility.enelx.com/content/dam/enelxmobility/italia/documenti/manuali-schede-tecniche/Waybox-3-Security-Bulletin-06-2024-V1.pdf
Restart Required: Yes
Instructions:
1. Download latest firmware from Enel X portal 2. Apply update via management interface 3. Restart device 4. Verify version update
🔧 Temporary Workarounds
Network Access Control
linuxBlock external access to TCP port 7700 using firewall rules
iptables -A INPUT -p tcp --dport 7700 -j DROP
Network Segmentation
allIsolate Waybox devices on separate VLAN with restricted access
🧯 If You Can't Patch
- Implement strict network segmentation to isolate vulnerable devices
- Deploy intrusion detection systems monitoring for anomalous traffic on port 7700
🔍 How to Verify
Check if Vulnerable:
Check if TCP port 7700 is listening and compare firmware version against patched versions in security bulletinCheck Version:
Check device web interface or management console for firmware versionVerify Fix Applied:
Verify firmware version matches patched version from vendor advisory and test with vulnerability scanner📡 Detection & Monitoring
Log Indicators:
- Multiple connection attempts to port 7700
- Abnormal packet sizes to port 7700
- System crash or restart logs
Network Indicators:
- Unusual traffic patterns to TCP port 7700
- Large or malformed packets to port 7700
SIEM Query:
source_port=* AND dest_port=7700 AND (packet_size>threshold OR protocol_anomaly=true)