CVE-2024-20124
📋 TL;DR
This vulnerability in MediaTek's vdec component allows local attackers with system privileges to read memory beyond intended boundaries, potentially exposing sensitive information. It affects devices using MediaTek chipsets with vulnerable video decoder implementations. No user interaction is required for exploitation.
💻 Affected Systems
- MediaTek chipsets with vdec component
📦 What is this software?
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
System-level information disclosure including kernel memory, cryptographic keys, or other sensitive data accessible to privileged processes.
Likely Case
Limited information disclosure from video decoder process memory, potentially exposing some system information but not full system compromise.
If Mitigated
No impact if proper privilege separation is enforced and system processes are isolated.
🎯 Exploit Status
Requires system execution privileges and knowledge of memory layout; no public exploit details available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to patch ID ALPS09008925 in device firmware updates
Vendor Advisory: https://corp.mediatek.com/product-security-bulletin/November-2024
Restart Required: Yes
Instructions:
1. Check with device manufacturer for firmware updates. 2. Apply security patch containing ALPS09008925. 3. Reboot device after update.
🔧 Temporary Workarounds
Restrict system privileges
androidLimit which applications and users have system execution privileges
🧯 If You Can't Patch
- Implement strict application sandboxing to limit privilege escalation
- Monitor for unusual system process behavior and memory access patterns
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against manufacturer's patched versions; examine if vdec component is present and accessible.Check Version:
Manufacturer-specific commands vary; typically check Settings > About Phone > Build Number on Android devices.Verify Fix Applied:
Verify patch ID ALPS09008925 is present in installed firmware and vdec component version is updated.📡 Detection & Monitoring
Log Indicators:
- Unusual memory access patterns in system logs
- vdec process crashes or abnormal behavior
Network Indicators:
- None - local vulnerability only
SIEM Query:
Process:vdec AND (EventID:memory_access_violation OR abnormal_behavior)