CVE-2023-51580
📋 TL;DR
This vulnerability in BlueZ's AVRCP protocol allows attackers to read memory beyond allocated buffers via Bluetooth, potentially disclosing sensitive information. It affects Linux systems using BlueZ for Bluetooth audio control. Attackers must be network-adjacent and require user interaction to connect a malicious device.
💻 Affected Systems
- BlueZ
📦 What is this software?
Bluez by Bluez
⚠️ Risk & Real-World Impact
Worst Case
Information disclosure combined with other vulnerabilities could lead to arbitrary code execution as root, potentially compromising the entire system.
Likely Case
Information disclosure of memory contents, which could reveal sensitive data or system information useful for further attacks.
If Mitigated
Limited information disclosure with no code execution if proper Bluetooth security controls are in place.
🎯 Exploit Status
Requires user to connect to malicious Bluetooth device and additional vulnerabilities for code execution.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check with your Linux distribution for specific patched BlueZ version
Vendor Advisory: https://www.zerodayinitiative.com/advisories/ZDI-23-1903/
Restart Required: Yes
Instructions:
1. Check your Linux distribution's security advisories. 2. Update BlueZ package via package manager. 3. Restart Bluetooth service or reboot system.
🔧 Temporary Workarounds
Disable Bluetooth AVRCP Profile
linuxDisable the AVRCP Bluetooth profile to prevent exploitation
sudo systemctl stop bluetooth
sudo systemctl disable bluetooth
Disable Bluetooth Completely
linuxTurn off Bluetooth to eliminate attack surface
sudo rfkill block bluetooth
🧯 If You Can't Patch
- Disable Bluetooth when not in use
- Implement strict Bluetooth pairing policies and only connect to trusted devices
🔍 How to Verify
Check if Vulnerable:
Check BlueZ version: bluetoothd --version or dpkg -l bluez | grep bluezCheck Version:
bluetoothd --version || dpkg -l bluez | grep bluez || rpm -q bluezVerify Fix Applied:
Verify BlueZ version is updated to patched version from your distribution📡 Detection & Monitoring
Log Indicators:
- Unusual Bluetooth connection attempts
- AVRCP protocol errors in Bluetooth logs
Network Indicators:
- Suspicious Bluetooth device connections
- AVRCP traffic from unknown devices
SIEM Query:
source="bluetooth" AND (error OR "AVRCP" OR "out of bounds")