CVE-2024-47249
📋 TL;DR
Apache NimBLE versions through 1.7.0 have an improper array index validation vulnerability in HCI event handling that could allow memory corruption and crashes. This requires a malicious or malfunctioning Bluetooth controller to exploit. The vulnerability affects systems using Apache NimBLE Bluetooth stack.
💻 Affected Systems
- Apache NimBLE
📦 What is this software?
Nimble by Apache
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution or denial of service through memory corruption leading to system compromise.
Likely Case
Application crash or denial of service due to memory corruption from malformed Bluetooth packets.
If Mitigated
No impact if using patched version or proper Bluetooth controller validation.
🎯 Exploit Status
Requires specialized Bluetooth controller hardware or firmware modification to send malformed HCI events.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.8.0
Vendor Advisory: https://lists.apache.org/thread/7ckxw6481dp68ons627pjcb27c75n0mq
Restart Required: Yes
Instructions:
1. Download Apache NimBLE 1.8.0 from official repository. 2. Replace existing NimBLE installation with version 1.8.0. 3. Rebuild and redeploy applications using NimBLE. 4. Restart affected services or devices.
🔧 Temporary Workarounds
Disable Bluetooth or NimBLE
linuxTemporarily disable Bluetooth functionality or NimBLE stack if not required
systemctl stop bluetooth
killall nimble-host
Network segmentation
allIsolate Bluetooth devices to separate network segments
🧯 If You Can't Patch
- Implement Bluetooth device whitelisting to only allow trusted controllers
- Monitor for abnormal Bluetooth traffic and crashes in NimBLE applications
🔍 How to Verify
Check if Vulnerable:
Check NimBLE version: grep -r 'NIMBLE_VERSION' /path/to/nimble/source or check package managerCheck Version:
grep 'NIMBLE_VERSION' /usr/include/nimble/nimble_version.h 2>/dev/null || find / -name '*nimble*version*' -type f 2>/dev/null | xargs grep -l 'VERSION'Verify Fix Applied:
Verify version is 1.8.0 or higher and check commit f39330866a85fa4de49246e9d21334bc8d14f0a1 is present📡 Detection & Monitoring
Log Indicators:
- NimBLE crash logs
- Bluetooth stack errors
- Memory corruption warnings in system logs
Network Indicators:
- Unusual Bluetooth HCI event patterns
- Malformed Bluetooth packets
SIEM Query:
source="*nimble*" AND ("crash" OR "segfault" OR "memory corruption")