CVE-2023-42694
📋 TL;DR
CVE-2023-42694 is a missing permission check vulnerability in the WiFi service that allows local attackers to escalate privileges without requiring additional execution privileges. This affects devices using Unisoc chipsets with vulnerable WiFi implementations. Attackers can gain elevated system access from a standard user context.
💻 Affected Systems
- Unisoc chipset-based devices
- Android devices with Unisoc WiFi implementations
📦 What is this software?
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise where an attacker gains root/admin privileges, installs persistent malware, accesses sensitive data, and controls device functions.
Likely Case
Local privilege escalation allowing attackers to bypass security controls, install unauthorized applications, or access restricted system resources.
If Mitigated
Limited impact if proper access controls, SELinux/AppArmor policies, and least privilege principles are enforced.
🎯 Exploit Status
Requires local access but no special permissions; likely simple to exploit once details are known
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor-specific security updates
Vendor Advisory: https://www.unisoc.com/en_us/secy/announcementDetail/1731138365803266049
Restart Required: Yes
Instructions:
1. Check for device manufacturer security updates 2. Apply latest firmware/security patches 3. Reboot device after update
🔧 Temporary Workarounds
Disable WiFi when not needed
androidReduce attack surface by disabling WiFi service
adb shell svc wifi disable
Settings > Network & Internet > WiFi > Toggle off
Enforce SELinux/AppArmor policies
linuxStrengthen mandatory access controls around WiFi service
setenforce 1
Configure appropriate SELinux/AppArmor domains
🧯 If You Can't Patch
- Implement strict user access controls and least privilege principles
- Monitor for unusual privilege escalation attempts and WiFi service anomalies
🔍 How to Verify
Check if Vulnerable:
Check device chipset and WiFi driver version; devices with Unisoc chipsets running unpatched firmware are vulnerableCheck Version:
adb shell getprop ro.build.fingerprintVerify Fix Applied:
Verify security patch level is updated and check for specific CVE mention in security bulletins📡 Detection & Monitoring
Log Indicators:
- Unusual WiFi service activity
- Privilege escalation attempts
- SELinux/AppArmor denials related to WiFi
Network Indicators:
- Local network privilege escalation patterns
SIEM Query:
source="android" AND (event="permission_denied" OR event="privilege_escalation") AND service="wifi"