CVE-2021-32535
📋 TL;DR
This vulnerability involves hard-coded default credentials in QSAN SANOS storage operating system, allowing unauthenticated remote attackers to gain administrator access and execute arbitrary commands. All systems running vulnerable versions are affected. Attackers can completely compromise the storage system remotely.
💻 Affected Systems
- QSAN SANOS
📦 What is this software?
Sanos by Qsan
⚠️ Risk & Real-World Impact
Worst Case
Complete system takeover with data destruction, ransomware deployment, or data exfiltration from connected storage systems
Likely Case
Unauthorized administrative access leading to data theft, system configuration changes, or service disruption
If Mitigated
Limited impact if systems are isolated from untrusted networks and have additional authentication layers
🎯 Exploit Status
Exploitation requires only knowledge of the hard-coded credentials and network access to the management interface
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: QSAN SANOS v2.1.0
Vendor Advisory: https://www.twcert.org.tw/tw/cp-132-4892-768d9-1.html
Restart Required: Yes
Instructions:
1. Download QSAN SANOS v2.1.0 from QSAN support portal
2. Backup current configuration and data
3. Apply the firmware update through the management interface
4. Reboot the storage system
5. Verify the update completed successfully
🔧 Temporary Workarounds
Network isolation
allRestrict network access to QSAN management interfaces using firewall rules
VLAN segmentation
allPlace QSAN systems on isolated VLANs with strict access controls
🧯 If You Can't Patch
- Implement strict network segmentation to isolate QSAN systems from untrusted networks
- Deploy network-based intrusion detection to monitor for authentication attempts using default credentials
🔍 How to Verify
Check if Vulnerable:
Check SANOS version in web interface or CLI. Versions before 2.1.0 are vulnerable.Check Version:
Check via web interface at System > Information or via SSH if enabledVerify Fix Applied:
Verify version shows 2.1.0 or later in system information📡 Detection & Monitoring
Log Indicators:
- Failed login attempts followed by successful login with default credentials
- Unusual administrative actions from new IP addresses
Network Indicators:
- Authentication attempts to management interface using known default credentials
- Unusual outbound connections from storage system
SIEM Query:
source="qsan_logs" AND (event_type="authentication" AND (username="admin" OR username="default"))