CVE-2024-27081
📋 TL;DR
This vulnerability in ESPHome's dashboard component allows authenticated attackers to read and write arbitrary files within the configuration directory, potentially leading to remote code execution. It affects ESPHome version 2023.12.9 (command line installation). Users running this version with the dashboard exposed are at risk.
💻 Affected Systems
- ESPHome
📦 What is this software?
Esphome by Esphome
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise via remote code execution, allowing attacker to execute arbitrary commands, steal data, or pivot to other systems.
Likely Case
Unauthorized access to configuration files, potential modification of device configurations, and limited file system access within the configuration directory.
If Mitigated
No impact if proper authentication controls and network segmentation are implemented, or if the dashboard is not exposed.
🎯 Exploit Status
Requires authenticated access to the dashboard API. The vulnerability is in the edit configuration file API endpoint.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2024.2.1
Vendor Advisory: https://github.com/esphome/esphome/security/advisories/GHSA-8p25-3q46-8q2p
Restart Required: Yes
Instructions:
1. Update ESPHome to version 2024.2.1 or later using 'pip install --upgrade esphome'. 2. Restart the ESPHome dashboard service.
🔧 Temporary Workarounds
Disable Dashboard Access
allTemporarily disable or restrict access to the ESPHome dashboard component.
Stop the ESPHome dashboard service
Block dashboard port (6052) in firewall
Network Segmentation
allRestrict dashboard access to trusted internal networks only.
Configure firewall to allow dashboard access only from specific IPs
🧯 If You Can't Patch
- Implement strict network access controls to limit dashboard access to trusted sources only.
- Disable the dashboard component entirely and use alternative configuration methods.
🔍 How to Verify
Check if Vulnerable:
Check ESPHome version with 'esphome version'. If version is 2023.12.9, you are vulnerable.Check Version:
esphome versionVerify Fix Applied:
After updating, verify version is 2024.2.1 or later with 'esphome version'.📡 Detection & Monitoring
Log Indicators:
- Unusual file access patterns in ESPHome logs
- Multiple failed authentication attempts to dashboard
- Unexpected configuration file modifications
Network Indicators:
- Unusual traffic to dashboard API endpoints
- Requests to edit configuration file API from unexpected sources
SIEM Query:
source="esphome" AND (event="file_access" OR event="config_edit")🔗 References
- https://github.com/esphome/esphome/commit/d814ed1d4adc71fde47c4df41215bee449884513
- https://github.com/esphome/esphome/security/advisories/GHSA-8p25-3q46-8q2p
- https://github.com/esphome/esphome/commit/d814ed1d4adc71fde47c4df41215bee449884513
- https://github.com/esphome/esphome/security/advisories/GHSA-8p25-3q46-8q2p
