CVE-2024-20076
📋 TL;DR
This vulnerability in MediaTek modems allows remote attackers to cause a system crash through incorrect error handling, leading to denial of service without requiring user interaction or additional privileges. It affects devices using vulnerable MediaTek modem firmware.
💻 Affected Systems
- MediaTek modem chipsets
📦 What is this software?
Lr12a by Mediatek
⚠️ Risk & Real-World Impact
Worst Case
Complete device crash requiring physical reboot, potentially disrupting critical communications in affected devices.
Likely Case
Temporary denial of service affecting modem functionality until system restart.
If Mitigated
No impact if patched or if network controls prevent malicious traffic.
🎯 Exploit Status
No authentication or user interaction required; remote exploitation possible.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Patch ID: MOLY01297806
Vendor Advisory: https://corp.mediatek.com/product-security-bulletin/July-2024
Restart Required: Yes
Instructions:
1. Contact device manufacturer for firmware updates. 2. Apply MediaTek-provided modem firmware patch. 3. Reboot device after patch installation.
🔧 Temporary Workarounds
Network segmentation
allRestrict modem interface access to trusted networks only
Firewall rules
allBlock unnecessary modem protocol traffic from untrusted sources
🧯 If You Can't Patch
- Isolate affected devices from untrusted networks
- Monitor for unusual modem crash events and implement redundancy
🔍 How to Verify
Check if Vulnerable:
Check device modem firmware version against MediaTek security bulletin; contact manufacturer for vulnerability status.Check Version:
Device-specific commands vary; typically in Android: 'getprop | grep modem' or manufacturer diagnostic tools.Verify Fix Applied:
Verify patch ID MOLY01297806 is applied in modem firmware version; confirm no modem crashes from test traffic.📡 Detection & Monitoring
Log Indicators:
- Unexpected modem resets/crashes
- Modem error logs indicating handling failures
Network Indicators:
- Unusual modem protocol traffic patterns
- Spike in modem reset requests
SIEM Query:
Search for 'modem crash' OR 'modem reset' events in device logs within short timeframes.