CVE-2023-52351
📋 TL;DR
This vulnerability in the RIL (Radio Interface Layer) service allows local attackers with system privileges to perform out-of-bounds writes, potentially causing denial of service. It affects Unisoc chipset-based devices where the RIL service runs with elevated privileges. The vulnerability requires local access and system execution privileges to exploit.
💻 Affected Systems
- Unisoc chipset-based devices
- Devices using Unisoc RIL implementation
📦 What is this software?
Android by Google
Android by Google
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
Local privilege escalation leading to system compromise, persistent denial of service, or potential remote code execution if combined with other vulnerabilities.
Likely Case
Local denial of service affecting cellular functionality, potentially crashing the RIL service and disrupting voice/data services on affected devices.
If Mitigated
Limited impact due to requirement for system privileges and local access, with proper privilege separation preventing exploitation.
🎯 Exploit Status
Requires local access and system execution privileges. No public exploit code identified in references.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in references
Vendor Advisory: https://www.unisoc.com/en_us/secy/announcementDetail/1777143682512781313
Restart Required: Yes
Instructions:
1. Check with device manufacturer for security updates. 2. Apply Unisoc-provided patches for RIL service. 3. Update device firmware to latest version. 4. Reboot device after update.
🔧 Temporary Workarounds
Restrict RIL service privileges
androidReduce RIL service privileges if possible in device configuration
Requires device-specific SELinux/security policy modifications
Disable unnecessary RIL features
androidDisable non-essential RIL functionality to reduce attack surface
Device-specific configuration changes
🧯 If You Can't Patch
- Implement strict application sandboxing to prevent privilege escalation
- Monitor for RIL service crashes and abnormal behavior
🔍 How to Verify
Check if Vulnerable:
Check device chipset manufacturer and RIL service version. Vulnerable if using Unisoc chipset with unpatched RIL implementation.Check Version:
Device-specific commands vary by manufacturer. Generally: adb shell getprop ro.build.fingerprint or check Settings > About PhoneVerify Fix Applied:
Verify device has received security updates from manufacturer and check RIL service version against patched releases.📡 Detection & Monitoring
Log Indicators:
- RIL service crashes
- Abnormal RIL service restarts
- Permission denied errors in RIL logs
Network Indicators:
- Sudden loss of cellular connectivity
- Abnormal baseband behavior
SIEM Query:
Search for: 'RIL service crash' OR 'ril-daemon' AND (segfault OR SIGSEGV) in device/system logs