CVE-2023-42740
📋 TL;DR
This vulnerability in telecom services allows local attackers to write permission usage records of applications without proper authorization checks. It enables local privilege escalation without requiring additional execution privileges. Affected systems include telecom infrastructure using vulnerable Unisoc components.
💻 Affected Systems
- Unisoc telecom service components
📦 What is this software?
Android by Google
Android by Google
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
An attacker gains full system control by escalating privileges from a limited user account to root/admin, potentially compromising the entire telecom system and sensitive user data.
Likely Case
Local users or malicious apps bypass permission controls to access restricted system functions, modify app permissions, or tamper with telecom service records.
If Mitigated
With proper access controls and monitoring, impact is limited to isolated privilege boundary violations that can be detected and contained.
🎯 Exploit Status
Exploitation requires local access but no special privileges, making it relatively straightforward for attackers with physical or logical access to the device.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in available references
Vendor Advisory: https://www.unisoc.com/en_us/secy/announcementDetail/1731138365803266049
Restart Required: Yes
Instructions:
1. Contact Unisoc for specific patch details. 2. Apply security updates provided by Unisoc. 3. Restart affected telecom systems. 4. Verify patch installation through version checks.
🔧 Temporary Workarounds
Restrict local access
allLimit physical and logical access to telecom systems to authorized personnel only
Enhanced monitoring
allImplement strict monitoring of permission usage record modifications
🧯 If You Can't Patch
- Implement strict access controls to prevent unauthorized local access to telecom systems
- Deploy application whitelisting to prevent execution of unauthorized applications
🔍 How to Verify
Check if Vulnerable:
Check with Unisoc vendor for specific version vulnerability assessmentCheck Version:
Contact Unisoc for specific version checking commands for affected telecom systemsVerify Fix Applied:
Verify patch installation through vendor-provided verification methods and version checks📡 Detection & Monitoring
Log Indicators:
- Unauthorized modifications to app permission usage records
- Unexpected privilege escalation attempts
- Suspicious local access patterns to telecom services
Network Indicators:
- Not applicable - local vulnerability
SIEM Query:
source="telecom_service" AND (event_type="permission_modification" OR event_type="privilege_escalation") AND result="failure"