CVE-2023-42696
📋 TL;DR
This vulnerability in telecom services allows local attackers to escalate privileges without needing additional execution permissions. It affects systems running vulnerable telecom software where a missing permission check enables unauthorized access. The issue primarily impacts devices using affected telecom components.
💻 Affected Systems
- Unisoc telecom services/software
📦 What is this software?
Android by Google
Android by Google
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise where an attacker gains root/admin privileges, potentially taking full control of the device, accessing sensitive data, and installing persistent malware.
Likely Case
Local privilege escalation allowing attackers to bypass security controls, access restricted system functions, and potentially pivot to other systems.
If Mitigated
Limited impact with proper access controls and isolation, though the vulnerability still presents a security weakness that could be chained with other exploits.
🎯 Exploit Status
Exploitation requires local access but no additional privileges; complexity is low due to missing permission check.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific patched versions
Vendor Advisory: https://www.unisoc.com/en_us/secy/announcementDetail/1731138365803266049
Restart Required: Yes
Instructions:
1. Check vendor advisory for affected versions. 2. Apply security patches from Unisoc or device manufacturer. 3. Restart device to ensure patch activation. 4. Verify patch installation through version checks.
🔧 Temporary Workarounds
Restrict local access
allLimit physical and local network access to vulnerable devices to reduce attack surface
Implement strict user permissions
allEnforce least privilege principles and restrict user permissions on affected systems
🧯 If You Can't Patch
- Isolate affected systems in segmented network zones with strict access controls
- Implement application whitelisting and monitor for unusual privilege escalation attempts
🔍 How to Verify
Check if Vulnerable:
Check device/software version against vendor advisory; examine telecom service permissions and logs for unauthorized access attemptsCheck Version:
Device/OS specific command (e.g., 'getprop ro.build.version' for Android devices)Verify Fix Applied:
Verify installed version matches patched version from vendor advisory; test permission checks in telecom services📡 Detection & Monitoring
Log Indicators:
- Unusual privilege escalation attempts in system logs
- Unauthorized access to telecom service functions
- Permission check failures in security logs
Network Indicators:
- Local network traffic indicating privilege escalation attempts
- Unusual inter-process communication patterns
SIEM Query:
Example: 'event_type:privilege_escalation AND service:telecom'