CVE-2024-20055
📋 TL;DR
This vulnerability in MediaTek's imgsys component allows local information disclosure due to missing bounds checking. Attackers with system privileges and user interaction can exploit this to read sensitive memory contents. It affects devices using MediaTek chipsets with the vulnerable imgsys driver.
💻 Affected Systems
- MediaTek chipsets with imgsys component
📦 What is this software?
Android by Google
Android by Google
Iot Yocto by Mediatek
Yocto by Linuxfoundation
⚠️ Risk & Real-World Impact
Worst Case
An attacker with system privileges could read sensitive kernel memory, potentially exposing cryptographic keys, passwords, or other protected data.
Likely Case
Local information disclosure allowing reading of adjacent memory regions, potentially exposing some system information or application data.
If Mitigated
With proper privilege separation and minimal user interaction, impact is limited to controlled information disclosure.
🎯 Exploit Status
Requires system execution privileges and user interaction. No public exploit code available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Patch ID: ALPS08518692
Vendor Advisory: https://corp.mediatek.com/product-security-bulletin/April-2024
Restart Required: Yes
Instructions:
1. Check device manufacturer for firmware updates. 2. Apply the patch ALPS08518692 from MediaTek. 3. Reboot device after patch installation.
🔧 Temporary Workarounds
Restrict system privileges
linuxLimit applications and users with system execution privileges
Review and minimize SUID/SGID binaries
Implement principle of least privilege for all accounts
🧯 If You Can't Patch
- Implement strict access controls to limit system privilege usage
- Monitor for suspicious activity from processes with system privileges
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against manufacturer's patched versions. Look for imgsys driver version in /proc/modules or similar.Check Version:
Check device settings > About phone > Build number or security patch levelVerify Fix Applied:
Verify patch ALPS08518692 is applied in system firmware/security patch level📡 Detection & Monitoring
Log Indicators:
- Unusual memory access patterns in kernel logs
- Failed bounds check warnings
Network Indicators:
- None - local vulnerability only
SIEM Query:
Search for kernel panic logs or memory access violations related to imgsys driver