CVE-2025-29630
📋 TL;DR
A vulnerability in Gardyn 4 allows remote attackers with the corresponding SSH private key to gain root access to affected devices. This affects all Gardyn 4 systems with default SSH configurations. Attackers can fully compromise the device and potentially pivot to other network resources.
💻 Affected Systems
- Gardyn 4
⚠️ 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
Complete system compromise with root access, allowing installation of persistent malware, data theft, and use as a pivot point for lateral movement within the network.
Likely Case
Unauthorized root access leading to device manipulation, data exfiltration, and potential disruption of Gardyn system functionality.
If Mitigated
Limited impact if SSH access is restricted through network controls, key-based authentication is properly managed, and devices are isolated from critical networks.
🎯 Exploit Status
Exploitation requires possession of the corresponding SSH private key. The GitHub reference provides technical details about the vulnerability.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Gardyn official updates
Vendor Advisory: http://gardyn.com
Restart Required: Yes
Instructions:
1. Check for firmware updates through Gardyn management interface. 2. Apply available security patches. 3. Restart the device to ensure changes take effect. 4. Verify SSH key authentication is properly configured.
🔧 Temporary Workarounds
Disable SSH access
linuxCompletely disable SSH service on Gardyn devices if not required for operations
systemctl stop ssh
systemctl disable ssh
Restrict SSH network access
linuxUse firewall rules to limit SSH access to trusted management networks only
iptables -A INPUT -p tcp --dport 22 -s TRUSTED_IP -j ACCEPT
iptables -A INPUT -p tcp --dport 22 -j DROP
🧯 If You Can't Patch
- Isolate Gardyn devices on separate VLAN with strict network segmentation
- Implement strict monitoring for SSH authentication attempts and root access patterns
🔍 How to Verify
Check if Vulnerable:
Check if SSH is enabled and accessible on port 22, and verify if default or weak SSH keys are in useCheck Version:
Check device firmware version through Gardyn management interface or web interfaceVerify Fix Applied:
Attempt SSH connection with known vulnerable keys - should be rejected. Verify firmware version matches patched release.📡 Detection & Monitoring
Log Indicators:
- Failed SSH authentication attempts
- Successful root SSH logins from unexpected sources
- SSH key authentication events
Network Indicators:
- SSH connections to Gardyn devices from unauthorized IPs
- Unusual outbound connections from Gardyn devices post-SSH access
SIEM Query:
source="auth.log" AND "sshd" AND ("Accepted publickey" OR "root") AND destination_ip="GARDYN_IP"