CVE-2024-23962
📋 TL;DR
This vulnerability allows unauthenticated remote attackers to access sensitive information from Alpine Halo9 devices via the DLT interface on TCP port 3490. The lack of authentication enables information disclosure that could be combined with other vulnerabilities for code execution. All Alpine Halo9 devices with the vulnerable DLT interface exposed are affected.
💻 Affected Systems
- Alpine Halo9 devices
📦 What is this software?
Ilx F509 Firmware by Alpsalpine
⚠️ Risk & Real-World Impact
Worst Case
Attackers combine this information disclosure with other vulnerabilities to achieve remote code execution, potentially gaining full control of the device.
Likely Case
Unauthenticated attackers access sensitive device information, configuration data, or logs that could facilitate further attacks.
If Mitigated
With proper network segmentation and access controls, impact is limited to information disclosure from isolated devices.
🎯 Exploit Status
Exploitation requires only network access to port 3490. No authentication needed. Weaponization likely due to automotive device targeting.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.zerodayinitiative.com/advisories/ZDI-24-847/
Restart Required: No
Instructions:
Check with Alpine for firmware updates. If unavailable, implement network-level controls and workarounds.
🔧 Temporary Workarounds
Network Segmentation
allBlock external access to DLT interface port 3490
iptables -A INPUT -p tcp --dport 3490 -j DROP
netsh advfirewall firewall add rule name="Block Alpine DLT" dir=in action=block protocol=TCP localport=3490
Service Disablement
allDisable DLT interface if not required
Check device configuration interface for DLT service toggle
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Alpine devices from untrusted networks
- Deploy network monitoring and intrusion detection for port 3490 traffic
🔍 How to Verify
Check if Vulnerable:
Use nmap or telnet to check if port 3490 is open and accessible: nmap -p 3490 <device_ip>Check Version:
Check device firmware version through device interface or manufacturer toolsVerify Fix Applied:
Verify port 3490 is no longer accessible from untrusted networks and DLT interface is disabled📡 Detection & Monitoring
Log Indicators:
- Unauthenticated access attempts to port 3490
- DLT interface error or access logs
Network Indicators:
- Unexpected connections to TCP port 3490
- Traffic patterns to Alpine devices from untrusted sources
SIEM Query:
source_port=3490 OR dest_port=3490 | stats count by src_ip, dest_ip