CVE-2025-40886
📋 TL;DR
This SQL injection vulnerability in the Alert functionality allows authenticated users with limited privileges to execute arbitrary SQL commands on the database. This could lead to unauthorized data access, modification, or disruption of database operations. Organizations using the affected software with web interfaces are at risk.
💻 Affected Systems
- Nozomi Networks Guardian/CMC
📦 What is this software?
Cmc by Nozominetworks
Guardian by Nozominetworks
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise including data exfiltration, data destruction, privilege escalation to admin, and potential lateral movement to other systems.
Likely Case
Unauthorized access to sensitive data within the application database, modification of user permissions, or disruption of alert functionality.
If Mitigated
Limited impact due to proper input validation, parameterized queries, and database user privilege restrictions.
🎯 Exploit Status
Exploitation requires authenticated access but SQL injection techniques are well-documented and easy to weaponize
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Nozomi Networks advisory for specific patched versions
Vendor Advisory: https://security.nozominetworks.com/NN-2025:7-01
Restart Required: Yes
Instructions:
1. Review Nozomi Networks advisory NN-2025:7-01. 2. Download and apply the latest security patch from Nozomi support portal. 3. Restart the affected services or appliance as required. 4. Verify the fix by testing the alert functionality.
🔧 Temporary Workarounds
Input Validation Enhancement
allImplement strict input validation on the alert parameter to reject SQL special characters
Database User Privilege Reduction
allRestrict database user permissions to only necessary operations
🧯 If You Can't Patch
- Implement web application firewall (WAF) with SQL injection rules
- Restrict network access to the web interface to trusted IPs only
🔍 How to Verify
Check if Vulnerable:
Test the alert functionality with SQL injection payloads (e.g., ' OR '1'='1) while monitoring database queriesCheck Version:
Check appliance web interface for version information or use vendor-specific CLI commandsVerify Fix Applied:
Attempt SQL injection tests after patch; successful queries should be blocked or sanitized📡 Detection & Monitoring
Log Indicators:
- Unusual SQL queries in database logs
- Multiple failed login attempts followed by alert function access
- SQL syntax errors in application logs
Network Indicators:
- HTTP POST requests to alert endpoints containing SQL keywords
- Unusual database connection patterns from web server
SIEM Query:
source="web_logs" AND (uri="/alert" OR uri="/alerts") AND (request_body CONTAINS "UNION" OR request_body CONTAINS "SELECT" OR request_body CONTAINS "INSERT")