CVE-2023-42692
📋 TL;DR
This CVE describes a missing permission check in the WiFi service that allows local privilege escalation without requiring additional execution privileges. Attackers with local access could exploit this to gain elevated privileges on affected systems. The vulnerability primarily affects devices using Unisoc chipsets with vulnerable WiFi implementations.
💻 Affected Systems
- Unisoc chipset-based devices
- Devices with Unisoc WiFi implementations
📦 What is this software?
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
An attacker with local access could gain root/system-level privileges, potentially compromising the entire device, accessing sensitive data, installing persistent malware, or using the device as a pivot point in the network.
Likely Case
Malicious apps or users with local access could elevate their privileges to perform unauthorized actions, access restricted system resources, or bypass security controls.
If Mitigated
With proper access controls and least privilege principles, the impact would be limited to the specific user context, preventing full system compromise.
🎯 Exploit Status
Exploitation requires local access but no additional privileges. The missing permission check suggests straightforward exploitation once the vulnerability is understood.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in references; check vendor advisories for specific patched versions
Vendor Advisory: https://www.unisoc.com/en_us/secy/announcementDetail/1731138365803266049
Restart Required: Yes
Instructions:
1. Check with device manufacturer for available firmware updates. 2. Apply the latest security patches from Unisoc. 3. Reboot the device after patching. 4. Verify the patch has been applied successfully.
🔧 Temporary Workarounds
Restrict local access
allLimit physical and logical access to devices to reduce attack surface
Disable unnecessary WiFi features
allTurn off WiFi when not needed or disable vulnerable WiFi services if possible
🧯 If You Can't Patch
- Implement strict access controls to limit who has local access to devices
- Monitor for suspicious privilege escalation attempts and unauthorized system modifications
🔍 How to Verify
Check if Vulnerable:
Check device specifications for Unisoc chipset usage and review firmware version against vendor advisoriesCheck Version:
Device-specific commands vary; typically 'getprop ro.build.version.security_patch' on Android or check firmware version in system settingsVerify Fix Applied:
Verify that the latest security patches from Unisoc have been applied and test for privilege escalation attempts📡 Detection & Monitoring
Log Indicators:
- Unexpected privilege escalation events
- Unauthorized access to system services
- Abnormal WiFi service activity
Network Indicators:
- Local network scanning from unexpected sources
- Unusual local network traffic patterns
SIEM Query:
Search for events where user privileges change unexpectedly or where system services are accessed without proper authorization