CVE-2024-39431
📋 TL;DR
This vulnerability in UMTS RLC driver allows remote attackers to write data beyond allocated memory boundaries due to missing bounds checks. It affects systems using Unisoc chipsets with vulnerable UMTS RLC driver implementations. Successful exploitation requires system execution privileges but could lead to denial of service.
💻 Affected Systems
- Unisoc chipsets with UMTS RLC driver
📦 What is this software?
Android by Google
Android by Google
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, though this requires system privileges which may not be directly exploitable remotely.
Likely Case
Remote denial of service causing system crashes or instability in affected UMTS network components.
If Mitigated
Limited impact if proper privilege separation and network segmentation are implemented.
🎯 Exploit Status
Exploitation requires system privileges, which may require chaining with other vulnerabilities for remote exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Unisoc security advisory for specific patch versions
Vendor Advisory: https://www.unisoc.com/en_us/secy/announcementDetail/1830802995705610241
Restart Required: Yes
Instructions:
1. Check Unisoc security advisory for affected chipset models. 2. Contact device manufacturer for firmware updates. 3. Apply provided patches. 4. Reboot affected devices.
🔧 Temporary Workarounds
Network Segmentation
allIsolate UMTS network components from untrusted networks
Privilege Reduction
linuxRun UMTS services with minimal necessary privileges
🧯 If You Can't Patch
- Implement strict network access controls to limit exposure
- Monitor for abnormal system behavior and crashes
🔍 How to Verify
Check if Vulnerable:
Check chipset version and firmware against Unisoc advisory; examine system logs for UMTS driver crashesCheck Version:
Check device firmware version through manufacturer-specific commands or settingsVerify Fix Applied:
Verify firmware version matches patched version from vendor; test UMTS functionality📡 Detection & Monitoring
Log Indicators:
- UMTS RLC driver crashes
- Kernel panic logs
- Memory corruption errors
Network Indicators:
- Abnormal UMTS protocol traffic
- Unexpected connection attempts to UMTS interfaces
SIEM Query:
source="kernel" AND ("UMTS" OR "RLC") AND ("panic" OR "crash" OR "oops")