CVE-2023-3267
📋 TL;DR
CVE-2023-3267 is an OS command injection vulnerability in CyberPower PowerPanel Enterprise that allows authenticated users to execute arbitrary commands with SYSTEM privileges by injecting malicious input into the username field when adding remote backup locations. This affects organizations using CyberPower PowerPanel Enterprise for power management in data centers and critical infrastructure. Attackers with valid credentials can achieve complete system compromise.
💻 Affected Systems
- CyberPower PowerPanel Enterprise
📦 What is this software?
Powerpanel Server by Cyberpower
⚠️ Risk & Real-World Impact
Worst Case
Complete system takeover with SYSTEM privileges, enabling installation of persistent backdoors, data exfiltration, lateral movement across the network, and disruption of power management systems affecting critical infrastructure.
Likely Case
Attackers with stolen or compromised credentials execute malicious commands to establish persistence, steal credentials, and move laterally within the network to compromise additional systems.
If Mitigated
With proper network segmentation, credential protection, and monitoring, exploitation would be detected and contained before significant damage occurs.
🎯 Exploit Status
Exploitation requires authenticated access but is straightforward once credentials are obtained. The vulnerability is well-documented in public research.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check CyberPower advisory for specific patched version
Vendor Advisory: https://www.cyberpowersystems.com/support/security-advisory/
Restart Required: Yes
Instructions:
1. Check CyberPower security advisory for patched version. 2. Download and install the latest PowerPanel Enterprise update from CyberPower. 3. Restart the PowerPanel Enterprise service or server. 4. Verify the fix by testing the vulnerability.
🔧 Temporary Workarounds
Restrict Access to PowerPanel Interface
allLimit network access to PowerPanel Enterprise management interface to only authorized administrative IP addresses.
Configure firewall rules to restrict access to PowerPanel Enterprise ports (typically 80/443) to trusted IP ranges only.
Implement Strong Authentication Controls
allEnforce strong, unique passwords and implement multi-factor authentication if supported.
Enforce password policies: minimum 12 characters, complexity requirements, regular rotation. Consider integrating with existing authentication systems.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate PowerPanel systems from critical infrastructure and limit lateral movement potential.
- Enhance monitoring and logging of PowerPanel authentication attempts and command execution activities for early detection of exploitation attempts.
🔍 How to Verify
Check if Vulnerable:
Test by attempting to inject OS commands into the username field when configuring remote backup locations. Monitor for unexpected command execution.Check Version:
Check PowerPanel Enterprise version through the web interface or application properties.Verify Fix Applied:
After patching, attempt the same command injection test. Successful fix should result in proper input validation and rejection of malicious input.📡 Detection & Monitoring
Log Indicators:
- Unusual command execution events in Windows Event Logs from PowerPanel processes
- Failed or successful authentication attempts from unexpected IP addresses
- Suspicious process creation by PowerPanel service
Network Indicators:
- Unusual outbound connections from PowerPanel server to external IPs
- Unexpected network traffic patterns from PowerPanel system
SIEM Query:
source="PowerPanel" AND (event_type="command_execution" OR username CONTAINS special characters like |, &, ;, $) OR process_name="cmd.exe" parent_process="PowerPanel"