CVE-2024-20050
📋 TL;DR
This vulnerability in the flashc component allows local information disclosure when exploited by a process with System execution privileges. It affects MediaTek devices using vulnerable flashc firmware. No user interaction is required for exploitation.
💻 Affected Systems
- MediaTek devices with vulnerable flashc firmware
📦 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
An attacker with System privileges could read sensitive information from flash memory, potentially exposing cryptographic keys, device identifiers, or other protected data.
Likely Case
Malicious apps with elevated permissions could extract device-specific information that could be used for further attacks or device fingerprinting.
If Mitigated
With proper privilege separation and app sandboxing, the impact is limited to information accessible only to System-level processes.
🎯 Exploit Status
Exploitation requires System execution privileges; no public exploit code is known at this time.
🛠️ 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. Check with device manufacturer for firmware updates. 2. Apply the patch ALPS08541757. 3. Reboot the device after patching. 4. Verify the patch is applied through system logs or version checks.
🔧 Temporary Workarounds
Restrict System Privileges
linuxLimit which applications and processes can obtain System execution privileges through SELinux policies or app permissions.
Review and tighten SELinux policies for flashc access
Audit apps with System-level permissions
🧯 If You Can't Patch
- Implement strict app vetting and permission controls to prevent malicious apps from obtaining System privileges.
- Monitor for unusual System-level process activity and flash memory access patterns.
🔍 How to Verify
Check if Vulnerable:
Check device firmware version and patch level; look for presence of patch ALPS08541757 in system logs or firmware metadata.Check Version:
Check device firmware version through settings or using 'getprop ro.build.fingerprint' on Android devices.Verify Fix Applied:
Verify that patch ALPS08541757 is listed in applied patches and check system logs for successful patch application.📡 Detection & Monitoring
Log Indicators:
- Unusual flashc component exceptions or crashes
- Multiple failed flash memory access attempts by System processes
Network Indicators:
- Not applicable - local vulnerability only
SIEM Query:
Search for 'flashc' exceptions or crashes in system logs, particularly from processes with System privileges.