CVE-2024-24731
📋 TL;DR
This is a buffer overflow vulnerability in Silicon Labs Gecko OS that allows network-adjacent attackers to execute arbitrary code without authentication by exploiting improper length validation in the http_download command. It affects devices running vulnerable versions of Gecko OS that have the HTTP server enabled.
💻 Affected Systems
- Silicon Labs Gecko OS
📦 What is this software?
Gecko Os by Silabs
⚠️ 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
Full device compromise with remote code execution leading to complete control over the device, data theft, and lateral movement within the network.
Likely Case
Device takeover allowing attackers to install persistent malware, disrupt operations, or use the device as a foothold for further attacks.
If Mitigated
Limited impact if proper network segmentation and access controls prevent adjacent network access to vulnerable devices.
🎯 Exploit Status
Exploitation requires network adjacency and knowledge of the target device's IP/network presence.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Gecko OS 5.5.0 and later
Vendor Advisory: https://community.silabs.com/a45Vm0000000Atp
Restart Required: Yes
Instructions:
1. Download Gecko OS 5.5.0 or later from Silicon Labs. 2. Follow vendor firmware update procedures for your specific device. 3. Verify the update completed successfully.
🔧 Temporary Workarounds
Disable HTTP Server
allDisable the HTTP server functionality if not required for device operation
Consult device documentation for HTTP server disable commands
Network Segmentation
allIsolate vulnerable devices in separate network segments with strict access controls
🧯 If You Can't Patch
- Implement strict network access controls to limit adjacent network access to vulnerable devices
- Monitor network traffic for unusual HTTP requests to the device's IP address
🔍 How to Verify
Check if Vulnerable:
Check Gecko OS version via device console or management interface. Versions below 5.5.0 are vulnerable if HTTP server is enabled.Check Version:
Consult device-specific documentation for version check command (varies by implementation)Verify Fix Applied:
Verify Gecko OS version is 5.5.0 or higher after applying the update.📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP requests to device
- Buffer overflow error messages in system logs
- Unexpected device reboots
Network Indicators:
- HTTP requests with unusually long parameters to device port
- Traffic patterns suggesting exploitation attempts
SIEM Query:
source_ip=* AND dest_ip=[device_ip] AND dest_port=80 AND http_uri CONTAINS "http_download" AND http_query_length > [threshold]