CVE-2024-2104
📋 TL;DR
This vulnerability allows an attacker within Bluetooth Low Energy (BLE) range to read and write device control commands without authentication due to improper GATT server security configurations. This affects devices using the vulnerable mobile app service, potentially rendering them unusable. Attackers must be physically adjacent to the target device.
💻 Affected Systems
- HARMAN devices with vulnerable BLE GATT server implementation
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing permanent bricking, unauthorized control of device functions, and potential data exfiltration through adjacent BLE access.
Likely Case
Temporary device disruption, unauthorized command execution, and potential denial of service through adjacent BLE attacks.
If Mitigated
Limited impact with proper BLE security controls, authentication requirements, and network segmentation in place.
🎯 Exploit Status
Exploitation requires BLE proximity and basic BLE communication tools, but no public exploit code is confirmed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisories for specific device updates
Vendor Advisory: https://harman.csaf-tp.certvde.com/.well-known/csaf/white/2025/hbsa-2025-0001.json
Restart Required: Yes
Instructions:
1. Check HARMAN security advisory for affected devices. 2. Apply vendor-provided firmware updates. 3. Restart devices after patching. 4. Verify BLE security configurations post-update.
🔧 Temporary Workarounds
Disable BLE when not needed
allTurn off Bluetooth Low Energy functionality to prevent adjacent attacks
Device-specific BLE disable command (varies by device)
Implement BLE authentication
allConfigure GATT server to require authentication for read/write operations
BLE security configuration commands (device-specific)
🧯 If You Can't Patch
- Physically isolate devices in secure areas to limit BLE proximity attacks
- Implement network segmentation and monitor for unusual BLE communication patterns
🔍 How to Verify
Check if Vulnerable:
Use BLE scanning tools to check if device GATT services allow unauthenticated read/write operationsCheck Version:
Device-specific firmware version check command (consult device documentation)Verify Fix Applied:
Test BLE communication post-patch to confirm authentication is required for GATT operations📡 Detection & Monitoring
Log Indicators:
- Unauthorized BLE connection attempts
- Unexpected GATT service read/write operations
- Device control commands from unknown BLE devices
Network Indicators:
- Unusual BLE traffic patterns
- Multiple failed BLE authentication attempts
- BLE connections from unexpected MAC addresses
SIEM Query:
Example: BLE connection events where authentication = false AND (operation = read OR operation = write)