CVE-2024-20057
📋 TL;DR
CVE-2024-20057 is a memory corruption vulnerability in MediaTek's keyInstall component where missing bounds checks allow out-of-bounds writes. This enables local privilege escalation to SYSTEM level without requiring user interaction. The vulnerability affects MediaTek-based Android devices.
💻 Affected Systems
- MediaTek-based Android devices
📦 What is this software?
Android by Google
Android by Google
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise with SYSTEM privileges, allowing attackers to install persistent malware, access all user data, and bypass security controls.
Likely Case
Local privilege escalation from a compromised app or user session to SYSTEM privileges, enabling further exploitation of the device.
If Mitigated
Limited impact if proper application sandboxing and SELinux policies are enforced, though SYSTEM access would still be achievable.
🎯 Exploit Status
Requires local access and SYSTEM execution privileges to exploit, but no user interaction needed. Memory corruption vulnerabilities often have reliable exploitation paths.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Patch ID: ALPS08587881
Vendor Advisory: https://corp.mediatek.com/product-security-bulletin/May-2024
Restart Required: Yes
Instructions:
1. Check with device manufacturer for firmware updates. 2. Apply the May 2024 MediaTek security patch. 3. Reboot device after update installation.
🔧 Temporary Workarounds
Restrict local access
allLimit physical and remote access to devices to reduce attack surface
🧯 If You Can't Patch
- Isolate affected devices from critical networks and data
- Implement strict application whitelisting and monitoring for privilege escalation attempts
🔍 How to Verify
Check if Vulnerable:
Check device firmware version and compare against MediaTek's May 2024 security bulletin. Look for patch ID ALPS08587881 in installed updates.Check Version:
On Android: Settings > About Phone > Build Number / Software InformationVerify Fix Applied:
Verify that the May 2024 MediaTek security patch with ID ALPS08587881 is installed on the device.📡 Detection & Monitoring
Log Indicators:
- Unusual privilege escalation attempts in system logs
- Suspicious access to keyInstall component
Network Indicators:
- Not applicable - local vulnerability
SIEM Query:
Not applicable - requires device-level monitoring rather than network detection