CVE-2024-40568
📋 TL;DR
This CVE describes a critical buffer overflow vulnerability in btstack's mesh implementation that allows remote attackers to execute arbitrary code. The vulnerability affects systems using btstack mesh before commit 864e2f2b6b7878c8fab3cf5ee84ae566e3380c58. Attackers can exploit this via the pb_adv_handle_transaction_cont function to potentially gain full control of affected devices.
💻 Affected Systems
- btstack mesh implementation
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to complete system compromise, data theft, and persistent backdoor installation.
Likely Case
Service disruption, denial of service, or limited code execution depending on exploit constraints.
If Mitigated
Limited impact with proper network segmentation and exploit mitigations like ASLR and DEP.
🎯 Exploit Status
Public exploit details available in GitHub repository. Remote exploitation possible without authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Commit 864e2f2b6b7878c8fab3cf5ee84ae566e3380c58 or later
Vendor Advisory: https://github.com/bluekitchen/btstack/commit/864e2f2b6b7878c8fab3cf5ee84ae566e3380c58
Restart Required: Yes
Instructions:
1. Update btstack to commit 864e2f2b6b7878c8fab3cf5ee84ae566e3380c58 or later. 2. Rebuild and redeploy affected applications. 3. Restart services using btstack mesh.
🔧 Temporary Workarounds
Disable mesh provisioning
allTemporarily disable Bluetooth mesh provisioning if not required
Network segmentation
allIsolate Bluetooth mesh networks from critical infrastructure
🧯 If You Can't Patch
- Implement strict network access controls to limit Bluetooth mesh traffic
- Enable exploit mitigations like ASLR, DEP, and stack canaries if available
🔍 How to Verify
Check if Vulnerable:
Check btstack git commit hash. If before 864e2f2b6b7878c8fab3cf5ee84ae566e3380c58, vulnerable.Check Version:
git log --oneline -1Verify Fix Applied:
Verify btstack is at commit 864e2f2b6b7878c8fab3cf5ee84ae566e3380c58 or later.📡 Detection & Monitoring
Log Indicators:
- Unusual Bluetooth mesh provisioning attempts
- Process crashes in btstack components
Network Indicators:
- Abnormal Bluetooth mesh protocol traffic patterns
SIEM Query:
Process:btstack AND (EventID:1000 OR EventID:1001)