CVE-2023-33914
📋 TL;DR
CVE-2023-33914 is a vulnerability in the NIA0 algorithm implementation within Security Mode Command in certain Unisoc chipsets. It allows remote attackers to potentially disclose sensitive information without authentication or additional privileges. This affects devices using vulnerable Unisoc cellular modem chipsets.
💻 Affected Systems
- Unisoc cellular modem chipsets with NIA0 algorithm implementation
📦 What is this software?
Android by Google
Android by Google
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Remote attacker could intercept or manipulate cellular network communications, potentially accessing sensitive user data transmitted over cellular networks.
Likely Case
Information disclosure of cellular network signaling data, potentially revealing device location, IMSI, or other cellular identifiers.
If Mitigated
Limited impact with proper network segmentation and cellular security controls in place.
🎯 Exploit Status
Exploitation requires cellular network access and knowledge of 5G/NR security protocols.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in public advisory
Vendor Advisory: https://www.unisoc.com/en_us/secy/announcementDetail/1698296481653522434
Restart Required: Yes
Instructions:
1. Contact device manufacturer for firmware updates. 2. Apply Unisoc-provided patches for affected chipsets. 3. Update device firmware through manufacturer channels.
🔧 Temporary Workarounds
Disable vulnerable cellular bands
allConfigure devices to avoid using cellular bands that trigger the vulnerable NIA0 algorithm
Network-level filtering
allImplement network security controls to monitor for suspicious cellular signaling patterns
🧯 If You Can't Patch
- Isolate affected devices from sensitive networks and applications
- Implement additional encryption layers for cellular data transmission
🔍 How to Verify
Check if Vulnerable:
Check device specifications for Unisoc chipset usage and consult manufacturer security bulletinsCheck Version:
Device-specific commands vary by manufacturer (e.g., Android: Settings > About phone > Baseband version)Verify Fix Applied:
Verify firmware version against manufacturer's patched versions and test cellular security functions📡 Detection & Monitoring
Log Indicators:
- Unusual cellular signaling patterns
- Security Mode Command failures in modem logs
Network Indicators:
- Anomalous NIA0 algorithm usage patterns in cellular network monitoring
SIEM Query:
Not applicable - cellular network monitoring requires specialized telecom equipment