CVE-2024-20052
📋 TL;DR
This vulnerability in MediaTek's flashc component allows local information disclosure when exploited by a process with System execution privileges. It affects MediaTek-powered devices and requires no user interaction for exploitation. The issue stems from an uncaught exception that could leak sensitive information.
💻 Affected Systems
- MediaTek-powered devices (smartphones, tablets, IoT devices)
📦 What is this software?
Android by Google
Android by Google
Android by Google
Openwrt by Openwrt
Openwrt by Openwrt
Rdk B by Rdkcentral
Yocto by Linuxfoundation
⚠️ Risk & Real-World Impact
Worst Case
System-level information disclosure including kernel memory, cryptographic keys, or other privileged data could be exposed to a malicious local process.
Likely Case
Limited information disclosure from the flashc component to a local attacker with system privileges, potentially exposing device-specific configuration data.
If Mitigated
With proper privilege separation and process isolation, impact is limited to the flashc component's accessible memory space only.
🎯 Exploit Status
Requires system execution privileges and knowledge of the uncaught exception trigger mechanism.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Patch ID: ALPS08541757
Vendor Advisory: https://corp.mediatek.com/product-security-bulletin/April-2024
Restart Required: Yes
Instructions:
1. Contact device manufacturer for firmware updates. 2. Apply MediaTek patch ALPS08541757. 3. Update device firmware through manufacturer's update mechanism. 4. Reboot device after update.
🔧 Temporary Workarounds
Restrict system privileges
allLimit applications and processes with system execution privileges to reduce attack surface
🧯 If You Can't Patch
- Implement strict application sandboxing and privilege separation
- Monitor for suspicious system-level process behavior and memory access patterns
🔍 How to Verify
Check if Vulnerable:
Check device firmware version and MediaTek patch level. Vulnerable if patch ALPS08541757 is not applied.Check Version:
Device-specific commands vary by manufacturer. Typically: 'getprop ro.build.fingerprint' or check firmware settings.Verify Fix Applied:
Verify patch ALPS08541757 is present in device firmware and flashc component version is updated.📡 Detection & Monitoring
Log Indicators:
- Unexpected flashc component crashes
- System privilege escalation attempts
- Memory access violations in kernel logs
Network Indicators:
- None - local vulnerability only
SIEM Query:
Search for: 'flashc exception', 'kernel panic', or 'privilege escalation' in device/system logs