CVE-2024-23921
📋 TL;DR
CVE-2024-23921 is a critical remote code execution vulnerability in ChargePoint Home Flex charging stations that allows network-adjacent attackers to execute arbitrary code as root without authentication. The vulnerability exists in the wlanapp module due to improper validation of user-supplied strings before system call execution. All ChargePoint Home Flex charging stations with vulnerable firmware versions are affected.
💻 Affected Systems
- ChargePoint Home Flex charging stations
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain full root access to charging stations, allowing them to install persistent malware, disrupt charging operations, pivot to internal networks, or cause physical damage through electrical manipulation.
Likely Case
Attackers compromise charging stations to create botnets for cryptocurrency mining, data exfiltration, or as footholds for lateral movement in corporate/industrial networks.
If Mitigated
With proper network segmentation and access controls, impact is limited to charging station functionality disruption without network pivot capabilities.
🎯 Exploit Status
Exploitation requires network access but no authentication. Technical details suggest moderate complexity for skilled attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in available references
Vendor Advisory: https://www.zerodayinitiative.com/advisories/ZDI-24-1049/
Restart Required: Yes
Instructions:
1. Check ChargePoint vendor website for security updates 2. Apply latest firmware update 3. Restart charging station 4. Verify update applied successfully
🔧 Temporary Workarounds
Network Segmentation
allIsolate charging stations on separate VLAN with strict firewall rules
Access Control
allImplement MAC address filtering and disable unnecessary network services
🧯 If You Can't Patch
- Physically disconnect from networks when not in use
- Implement strict network monitoring for suspicious traffic to/from charging stations
🔍 How to Verify
Check if Vulnerable:
Check firmware version against vendor's vulnerable version list. Monitor for unexpected network connections or processes.Check Version:
Check through ChargePoint mobile app or web interface for firmware version informationVerify Fix Applied:
Verify firmware version matches patched version from vendor. Test for exploit using safe validation methods if available.📡 Detection & Monitoring
Log Indicators:
- Unexpected process execution
- System call errors in wlanapp module
- Authentication bypass attempts
Network Indicators:
- Unusual outbound connections from charging stations
- Suspicious network traffic to charging station ports
- Unexpected protocol usage
SIEM Query:
source="charging_station" AND (event_type="process_execution" OR event_type="system_call")