CVE-2024-20132
📋 TL;DR
This CVE describes an out-of-bounds write vulnerability in MediaTek modem firmware that allows local privilege escalation without user interaction. Attackers could gain elevated system access by exploiting missing bounds checks. This affects devices using vulnerable MediaTek modem chipsets.
💻 Affected Systems
- MediaTek modem chipsets
📦 What is this software?
Nr16 by Mediatek
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing attackers to execute arbitrary code with kernel privileges, potentially enabling persistent backdoors, data theft, or device bricking.
Likely Case
Local privilege escalation allowing attackers to bypass security controls, install malware, or access sensitive system resources.
If Mitigated
Limited impact if devices are properly segmented, have strict access controls, and modem firmware is isolated from critical system components.
🎯 Exploit Status
Exploitation requires local access but no user interaction. Technical details suggest memory corruption exploitation is needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Patch ID: MOLY00957388
Vendor Advisory: https://corp.mediatek.com/product-security-bulletin/December-2024
Restart Required: Yes
Instructions:
1. Check device manufacturer for firmware updates. 2. Apply MediaTek modem firmware patch MOLY00957388. 3. Reboot device after patch installation.
🔧 Temporary Workarounds
Restrict local access
allLimit physical and logical access to vulnerable devices to reduce attack surface
Disable unnecessary modem features
allReduce modem attack surface by disabling non-essential modem functions if supported
🧯 If You Can't Patch
- Isolate vulnerable devices on separate network segments
- Implement strict access controls and monitoring for devices with vulnerable modem firmware
🔍 How to Verify
Check if Vulnerable:
Check modem firmware version against MediaTek security bulletin or contact device manufacturerCheck Version:
Device-specific commands vary by manufacturer; typically in device settings or using manufacturer diagnostic toolsVerify Fix Applied:
Verify patch MOLY00957388 is applied by checking modem firmware version post-update📡 Detection & Monitoring
Log Indicators:
- Unexpected modem firmware crashes
- Privilege escalation attempts
- Unusual system process behavior
Network Indicators:
- Anomalous modem communication patterns
- Unexpected baseband processor activity
SIEM Query:
Search for: (event_category="kernel" OR "modem") AND ("crash" OR "privilege" OR "escalation")