CVE-2023-23574
📋 TL;DR
This is a blind SQL injection vulnerability in Nozomi Networks Guardian and CMC products that allows authenticated attackers to execute arbitrary SQL statements on the underlying database. Attackers can extract sensitive data, modify database structure and content, or disrupt database availability. Only authenticated users can exploit this vulnerability.
💻 Affected Systems
- Nozomi Networks Guardian
- Nozomi Networks CMC
📦 What is this software?
Cmc by Nozominetworks
Guardian by Nozominetworks
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the database including exfiltration of all sensitive data, destruction of database integrity, and denial of service affecting the entire Nozomi Networks monitoring system.
Likely Case
Data exfiltration of sensitive network monitoring information, configuration data, and potentially credential extraction from the database.
If Mitigated
Limited impact due to proper input validation and database permission restrictions, potentially only allowing data viewing without modification.
🎯 Exploit Status
Exploitation requires authenticated access but SQL injection techniques are well-documented and tools are readily available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific patched versions
Vendor Advisory: https://security.nozominetworks.com/NN-2023:3-01
Restart Required: Yes
Instructions:
1. Review vendor advisory NN-2023:3-01. 2. Download and apply the latest security update from Nozomi Networks. 3. Restart affected services. 4. Verify the patch is applied successfully.
🔧 Temporary Workarounds
Restrict Database Permissions
allLimit database user permissions to read-only access where possible to prevent data modification.
Network Segmentation
allRestrict access to Nozomi Networks web interface to only authorized administrators.
🧯 If You Can't Patch
- Implement strict input validation at the application layer for the alerts_count component
- Deploy a web application firewall (WAF) with SQL injection protection rules
🔍 How to Verify
Check if Vulnerable:
Check if your Nozomi Networks version is listed as vulnerable in advisory NN-2023:3-01Check Version:
Check version through Nozomi Networks web interface or consult product documentationVerify Fix Applied:
Verify the installed version matches or exceeds the patched version specified in the vendor advisory📡 Detection & Monitoring
Log Indicators:
- Unusual SQL query patterns in database logs
- Multiple failed authentication attempts followed by successful login
- Unusual access patterns to alerts_count endpoint
Network Indicators:
- Unusual database connection patterns from web application server
- Large data transfers from database to unexpected destinations
SIEM Query:
SELECT * FROM web_logs WHERE url LIKE '%alerts_count%' AND (params CONTAINS 'UNION' OR params CONTAINS 'SELECT' OR params CONTAINS 'INSERT' OR params CONTAINS 'DELETE')