CVE-2014-5334
📋 TL;DR
FreeNAS versions before 9.3-M3 have a default blank admin password, allowing remote attackers to gain root privileges through the WebGui login. This affects all FreeNAS installations running vulnerable versions with default configurations.
💻 Affected Systems
- FreeNAS
📦 What is this software?
Freenas by Freenas
Freenas by Freenas
Freenas by Freenas
Freenas by Freenas
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with root access, allowing data theft, system destruction, or use as pivot point in network attacks.
Likely Case
Unauthorized administrative access leading to data exfiltration, configuration changes, or service disruption.
If Mitigated
No impact if password has been changed from default or system is not internet-facing.
🎯 Exploit Status
Simple web login with blank password. No special tools required.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 9.3-M3 and later
Vendor Advisory: https://bugs.freenas.org/issues/5844
Restart Required: No
Instructions:
1. Update FreeNAS to version 9.3-M3 or later via System → Update. 2. Change admin password via Account → Users → Admin → Change Password.
🔧 Temporary Workarounds
Change Admin Password
allManually set a strong admin password to prevent blank password exploitation.
ssh into FreeNAS and run: 'passwd admin'
Or use WebGui: Account → Users → Admin → Change Password
Restrict WebGui Access
allLimit WebGui access to trusted networks only.
Configure firewall to restrict port 80/443 to trusted IPs
🧯 If You Can't Patch
- Immediately change admin password to strong, unique value
- Restrict WebGui access to internal network only via firewall rules
🔍 How to Verify
Check if Vulnerable:
Attempt to login to WebGui with username 'admin' and blank password. If successful, system is vulnerable.Check Version:
ssh to FreeNAS and run: 'freenas-version' or check WebGui System → InformationVerify Fix Applied:
Verify FreeNAS version is 9.3-M3 or later via System → Information, and confirm admin password is set.📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts followed by successful admin login
- WebGui access from unexpected IP addresses
Network Indicators:
- HTTP POST requests to /account/login/ with blank password field
SIEM Query:
source="freenas" (event="login" AND user="admin" AND result="success")