CVE-2024-20136
📋 TL;DR
This vulnerability in MediaTek's da component allows local attackers to read memory beyond intended boundaries without requiring elevated privileges or user interaction. It affects devices using MediaTek chipsets, potentially exposing sensitive information from kernel or system memory.
💻 Affected Systems
- MediaTek chipset-based devices
📦 What is this software?
Android by Google
Android by Google
Android by Google
Android by Google
Openwrt by Openwrt
Openwrt by Openwrt
Openwrt by Openwrt
Rdk B by Rdkcentral
Rdk B by Rdkcentral
⚠️ Risk & Real-World Impact
Worst Case
Local information disclosure could expose kernel memory, system credentials, or other sensitive data to unprivileged attackers on the device.
Likely Case
Information leakage of system memory contents, potentially revealing device-specific data or partial memory dumps.
If Mitigated
Limited impact with proper isolation and minimal sensitive data in accessible memory regions.
🎯 Exploit Status
No user interaction needed, but requires local access. Exploitation likely involves crafting specific inputs to trigger out-of-bounds read.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Patches identified by ALPS09121847
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 security patch ALPS09121847. 3. Reboot device after patch installation.
🔧 Temporary Workarounds
Restrict local access
allLimit physical and local application access to vulnerable devices
🧯 If You Can't Patch
- Isolate affected devices from sensitive networks
- Implement strict application sandboxing and privilege separation
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against MediaTek security bulletin or contact device manufacturerCheck Version:
Device-specific commands vary by manufacturer (e.g., Settings > About phone on Android)Verify Fix Applied:
Verify patch ALPS09121847 is applied in system firmware/security patch level📡 Detection & Monitoring
Log Indicators:
- Unusual da process crashes
- Memory access violation logs in kernel/dmesg
Network Indicators:
- No direct network indicators - local vulnerability
SIEM Query:
Process:da AND (EventID:1000 OR SIGSEGV) OR Kernel:out_of_bounds_read