CVE-2022-0550
📋 TL;DR
This vulnerability allows authenticated attackers with admin or report manager roles to execute arbitrary commands on Nozomi Networks Guardian and CMC appliances through improper input validation in custom report logo upload functionality. The attacker gains web server user privileges, potentially leading to full system compromise. This affects all versions prior to 22.0.0.
💻 Affected Systems
- Nozomi Networks Guardian
- Nozomi Networks CMC
📦 What is this software?
Cmc by Nozominetworks
Guardian by Nozominetworks
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise allowing attacker to execute arbitrary commands, access sensitive data, pivot to other systems, or disrupt operations.
Likely Case
Unauthorized command execution leading to data exfiltration, privilege escalation, or persistence mechanisms installation.
If Mitigated
Limited impact due to proper access controls, network segmentation, and monitoring preventing successful exploitation.
🎯 Exploit Status
Exploitation requires authenticated access with specific privileges. The vulnerability is in file upload functionality with improper input validation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 22.0.0
Vendor Advisory: https://security.nozominetworks.com/NN-2022:2-01
Restart Required: Yes
Instructions:
1. Backup current configuration. 2. Download and install version 22.0.0 or later from Nozomi Networks support portal. 3. Apply the update following vendor documentation. 4. Restart the appliance. 5. Verify successful update.
🔧 Temporary Workarounds
Restrict Access to Web Interface
allLimit network access to the web management interface to trusted IP addresses only.
Configure firewall rules to restrict access to management interface ports (typically 443/HTTPS)
Role-Based Access Control
allReview and minimize users with admin or report manager roles to only essential personnel.
Audit user accounts and remove unnecessary admin/report manager privileges
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Nozomi appliances from critical systems
- Enable detailed logging and monitoring for suspicious file upload activities and command execution attempts
🔍 How to Verify
Check if Vulnerable:
Check current version via web interface or CLI. If version is below 22.0.0, system is vulnerable.Check Version:
Check via web interface: System > About, or via CLI: show versionVerify Fix Applied:
Verify version is 22.0.0 or higher and test custom report logo upload functionality.📡 Detection & Monitoring
Log Indicators:
- Unusual file uploads to report logo directory
- Unexpected command execution events
- Authentication logs showing admin/report manager access followed by upload activities
Network Indicators:
- Unusual outbound connections from appliance following file uploads
- Suspicious payloads in HTTP POST requests to upload endpoints
SIEM Query:
source="nozomi_logs" AND (event_type="file_upload" AND file_path="*logo*" OR event_type="command_execution")