CVE-2025-3364
📋 TL;DR
This CVE describes a chroot escape vulnerability in HGiga PowerStation's SSH service. Attackers with root privileges can bypass chroot restrictions to access the entire file system. Organizations using affected HGiga PowerStation versions are impacted.
💻 Affected Systems
- HGiga PowerStation
⚠️ 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 where attackers with root access can read, modify, or delete any file on the system, potentially stealing sensitive data or deploying persistent malware.
Likely Case
Privileged attackers who have already gained root access can escalate their privileges further to access restricted files and directories they shouldn't be able to reach.
If Mitigated
With proper access controls and monitoring, the impact is limited to the specific chroot environment rather than full system compromise.
🎯 Exploit Status
Exploitation requires root privileges within the chroot environment first, making this a privilege escalation vulnerability rather than initial access
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific patched versions
Vendor Advisory: https://www.twcert.org.tw/en/cp-139-10058-fce0b-2.html
Restart Required: Yes
Instructions:
1. Check current PowerStation version. 2. Download and apply vendor patch. 3. Restart SSH service or reboot system. 4. Verify patch application.
🔧 Temporary Workarounds
Disable SSH Service
linuxTemporarily disable SSH service if not required for operations
systemctl stop sshd
systemctl disable sshd
Restrict SSH Access
linuxLimit SSH access to trusted IP addresses 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
- Implement strict access controls to prevent attackers from gaining root privileges in the chroot environment
- Monitor SSH logs for unusual activity and implement file integrity monitoring for critical system files
🔍 How to Verify
Check if Vulnerable:
Check PowerStation version against vendor advisory and verify if SSH service is running with vulnerable configurationCheck Version:
Check PowerStation web interface or documentation for version informationVerify Fix Applied:
Verify PowerStation version is updated to patched version and test chroot escape attempts fail📡 Detection & Monitoring
Log Indicators:
- Unusual SSH login attempts, especially as root
- File access patterns outside expected chroot directories
- Failed chroot escape attempts in system logs
Network Indicators:
- SSH connections from unexpected sources
- Unusual file transfer patterns over SSH
SIEM Query:
source="ssh_logs" AND (event="root_login" OR event="chroot_failure")