CVE-2024-53836
📋 TL;DR
This vulnerability allows local privilege escalation through a buffer overflow in the wbrc_bt_dev_write function of the wb_regon_coordinator.c component. Attackers with system execution privileges can exploit this without user interaction to gain elevated access. This affects Android devices, particularly Google Pixel phones.
💻 Affected Systems
- Google Pixel phones
- Android devices using affected Bluetooth components
📦 What is this software?
Android by Google
⚠️ Risk & Real-World Impact
Worst Case
An attacker with initial system execution privileges could achieve full device compromise, potentially installing persistent malware, accessing sensitive data, or disabling security controls.
Likely Case
Local privilege escalation allowing attackers to bypass application sandboxing and gain higher system privileges than originally granted.
If Mitigated
With proper privilege separation and exploit mitigations like ASLR, exploitation becomes more difficult but not impossible for determined attackers.
🎯 Exploit Status
Exploitation requires bypassing modern Android security mitigations like ASLR and stack canaries, but the buffer overflow provides a clear attack vector.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: December 2024 Android security update
Vendor Advisory: https://source.android.com/security/bulletin/pixel/2024-12-01
Restart Required: Yes
Instructions:
1. Check for system updates in Settings > System > System update. 2. Download and install the December 2024 security update. 3. Reboot the device to complete the installation.
🔧 Temporary Workarounds
Disable Bluetooth when not in use
androidReduces attack surface by disabling the vulnerable component
adb shell settings put global bluetooth_on 0
🧯 If You Can't Patch
- Implement strict application sandboxing and privilege separation to limit the impact of privilege escalation
- Monitor for unusual privilege escalation attempts using Android security logging
🔍 How to Verify
Check if Vulnerable:
Check Android security patch level in Settings > About phone > Android version. If patch level is earlier than December 2024, the device is vulnerable.Check Version:
adb shell getprop ro.build.version.security_patchVerify Fix Applied:
Verify the security patch level shows 'December 1, 2024' or later in Settings > About phone > Android version.📡 Detection & Monitoring
Log Indicators:
- Unusual privilege escalation attempts in system logs
- Crash reports from wb_regon_coordinator process
Network Indicators:
- None - this is a local vulnerability
SIEM Query:
source="android_system" AND (process="wb_regon_coordinator" OR message="privilege escalation")