CVE-2024-54983
📋 TL;DR
This vulnerability allows attackers to bypass authentication on Quectel BC95-CNV cellular modules by sending specially crafted NAS (Non-Access Stratum) messages. This affects IoT devices and systems using these modules for NB-IoT connectivity, potentially allowing unauthorized access to device functionality.
💻 Affected Systems
- Quectel BC95-CNV
⚠️ 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 attackers to intercept communications, inject malicious commands, or disable critical IoT infrastructure.
Likely Case
Unauthorized access to device management functions, data interception, or service disruption for affected IoT deployments.
If Mitigated
Limited impact if devices are behind firewalls with strict network segmentation and monitoring.
🎯 Exploit Status
Public GitHub repository contains proof-of-concept demonstrating the authentication bypass via crafted NAS messages.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: Unknown
Restart Required: Yes
Instructions:
1. Contact Quectel support for firmware updates. 2. Check vendor website for security advisories. 3. Apply firmware update following vendor instructions.
🔧 Temporary Workarounds
Network Segmentation
allIsolate affected devices in separate network segments with strict firewall rules.
Traffic Filtering
allBlock or filter NAS protocol messages at network perimeter.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate vulnerable devices
- Deploy network monitoring and intrusion detection for NAS protocol anomalies
🔍 How to Verify
Check if Vulnerable:
Check device firmware version via AT+CGMR command or device management interface.Check Version:
AT+CGMRVerify Fix Applied:
Verify firmware version has been updated beyond V100R001C00SPC051.📡 Detection & Monitoring
Log Indicators:
- Unusual NAS message patterns
- Authentication failures followed by successful access
- Unexpected device reboots or resets
Network Indicators:
- Anomalous NAS protocol traffic
- Unexpected connections to device management interfaces
- Traffic from unexpected sources to NB-IoT devices
SIEM Query:
source="nbiot-devices" AND (protocol="nas" AND size>normal) OR (auth_failure AND immediate_success)