CVE-2022-48243
📋 TL;DR
This CVE describes a missing permission check vulnerability in the audio service of certain systems, allowing local attackers to escalate privileges without requiring additional execution privileges. It affects devices using specific Unisoc chipsets. The vulnerability enables attackers to gain elevated system access from a standard user context.
💻 Affected Systems
- Devices with Unisoc chipsets (Tiger T310, T610, T618, T740, T760, T770)
📦 What is this software?
Android by Google
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, installs persistent malware, accesses sensitive data, and disables security controls.
Likely Case
Local privilege escalation allowing attackers to bypass application sandboxes, access protected system resources, and potentially install malicious applications.
If Mitigated
Limited impact if proper application sandboxing, SELinux/AppArmor policies, and least privilege principles are enforced.
🎯 Exploit Status
Requires local access and some technical knowledge to exploit; no public exploit code available at time of analysis.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Android security patch level 2023-01-05 or later
Vendor Advisory: https://www.unisoc.com/en_us/secy/announcementDetail/1654776866982133761
Restart Required: Yes
Instructions:
1. Check device manufacturer's security update page. 2. Apply Android security patch level 2023-01-05 or later. 3. Reboot device after update. 4. Verify patch installation in device settings.
🔧 Temporary Workarounds
Restrict audio service permissions
androidImplement strict SELinux/AppArmor policies to limit audio service capabilities
Requires custom SELinux policy configuration; consult device manufacturer for specific implementation
🧯 If You Can't Patch
- Implement strict application sandboxing and least privilege access controls
- Monitor for unusual privilege escalation attempts and restrict physical access to devices
🔍 How to Verify
Check if Vulnerable:
Check Android security patch level in Settings > About phone > Android version. If patch level is earlier than 2023-01-05 and device uses Unisoc chipset, it may be vulnerable.Check Version:
adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Verify Android security patch level is 2023-01-05 or later in device settings📡 Detection & Monitoring
Log Indicators:
- Unusual audio service permission requests
- Privilege escalation attempts in system logs
- Unexpected process execution with elevated privileges
Network Indicators:
- Not applicable - local vulnerability
SIEM Query:
source="android_system" AND (event="permission_violation" OR process="audio" AND privilege="escalation")