CVE-2025-20642
📋 TL;DR
This CVE describes an out-of-bounds write vulnerability in MediaTek DA software that could allow local privilege escalation. An attacker with physical access to the device could exploit this to gain elevated privileges without needing additional execution permissions. User interaction is required for successful exploitation.
💻 Affected Systems
- MediaTek DA (Download Agent) software
📦 What is this software?
Android by Google
Android by Google
Android by Google
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
An attacker with physical access could gain root/system privileges on the device, potentially compromising the entire system and accessing sensitive data.
Likely Case
Local privilege escalation allowing an attacker to bypass security controls and install malicious software or access restricted resources.
If Mitigated
With proper physical security controls and user awareness, the risk is significantly reduced as physical access and user interaction are required.
🎯 Exploit Status
Exploitation requires physical access and user interaction, which increases complexity compared to remote vulnerabilities.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Patch ID: ALPS09291146
Vendor Advisory: https://corp.mediatek.com/product-security-bulletin/February-2025
Restart Required: Yes
Instructions:
1. Check the MediaTek security bulletin for affected devices. 2. Apply the patch ALPS09291146. 3. Restart the device. 4. Verify the patch is applied through system updates or vendor-specific verification methods.
🔧 Temporary Workarounds
Physical Security Controls
allImplement strict physical access controls to prevent unauthorized physical access to devices.
User Awareness Training
allTrain users to avoid interacting with suspicious prompts or connecting untrusted devices.
🧯 If You Can't Patch
- Implement strict physical security controls and device access policies
- Isolate vulnerable devices from sensitive networks and data
🔍 How to Verify
Check if Vulnerable:
Check device specifications and chipset information to determine if MediaTek DA software is present. Consult the vendor advisory for specific affected versions.Check Version:
Device-specific commands vary by manufacturer. Typically: 'getprop ro.build.fingerprint' or checking Settings > About Phone > Build Number on Android devices.Verify Fix Applied:
Check system updates for patch ALPS09291146 or verify with device manufacturer that the security update has been applied.📡 Detection & Monitoring
Log Indicators:
- Unexpected privilege escalation events
- DA software crash logs
- Unauthorized access attempts to system files
Network Indicators:
- Unusual local device communication patterns if exploited
SIEM Query:
Search for: 'privilege escalation' OR 'DA crash' OR 'MediaTek DA' in system logs