CVE-2021-31575
📋 TL;DR
CVE-2021-31575 is a command injection vulnerability in MediaTek's Config Manager that allows remote attackers to execute arbitrary commands without authentication. This could lead to full system compromise on affected devices. The vulnerability affects MediaTek-based devices running vulnerable firmware versions.
💻 Affected Systems
- MediaTek Config Manager
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system takeover with root privileges, allowing installation of persistent malware, data theft, and device compromise.
Likely Case
Remote code execution leading to unauthorized access, data exfiltration, and potential lateral movement within the network.
If Mitigated
Limited impact if proper network segmentation and access controls prevent exploitation attempts.
🎯 Exploit Status
No authentication required, no user interaction needed. Exploitation likely straightforward given the command injection nature.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Patch ID: A20210009
Vendor Advisory: https://corp.mediatek.com/product-security-acknowledgements
Restart Required: Yes
Instructions:
1. Contact device manufacturer for firmware updates. 2. Apply MediaTek patch A20210009. 3. Reboot device after patch installation. 4. Verify patch application through version checking.
🔧 Temporary Workarounds
Network Segmentation
allIsolate MediaTek-based devices from untrusted networks
Access Control Restrictions
allImplement strict firewall rules to limit access to Config Manager services
🧯 If You Can't Patch
- Isolate affected devices in separate network segments with strict access controls
- Implement application whitelisting to prevent unauthorized command execution
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against MediaTek security advisories. Contact device manufacturer for vulnerability assessment.Check Version:
Device-specific commands vary by manufacturer. Typically: 'getprop ro.build.fingerprint' or manufacturer-specific firmware check utilities.Verify Fix Applied:
Verify patch A20210009 is applied through device firmware version checks or manufacturer-provided verification tools.📡 Detection & Monitoring
Log Indicators:
- Unusual command execution patterns in system logs
- Unexpected process creation from Config Manager
Network Indicators:
- Unexpected network connections from MediaTek devices
- Anomalous traffic to/from Config Manager ports
SIEM Query:
source="system_logs" AND process="ConfigManager" AND command="*;*" OR command="*|*" OR command="*`*"