CVE-2025-40898
📋 TL;DR
This path traversal vulnerability allows authenticated users with limited privileges to upload malicious Arc data archives that can write arbitrary files to any location on the system. This could lead to device configuration manipulation or system availability issues. The vulnerability affects systems using the vulnerable Import Arc data archive functionality.
💻 Affected Systems
- Nozomi Networks Guardian/CMC products with Arc data import functionality
📦 What is this software?
Cmc by Nozominetworks
Guardian by Nozominetworks
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise through arbitrary file writes, enabling configuration alteration, service disruption, or potential remote code execution by overwriting critical system files.
Likely Case
Unauthorized configuration changes leading to service disruption, data manipulation, or privilege escalation within the affected application.
If Mitigated
Limited impact with proper file permission restrictions and input validation, potentially only affecting non-critical application files.
🎯 Exploit Status
Exploitation requires authenticated access and knowledge of the Arc archive format
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Nozomi Networks advisory for specific patched versions
Vendor Advisory: https://security.nozominetworks.com/NN-2025:15-01
Restart Required: Yes
Instructions:
1. Access Nozomi Networks support portal
2. Download latest patched version
3. Backup current configuration
4. Apply update following vendor documentation
5. Restart affected services
🔧 Temporary Workarounds
Disable Arc Import Functionality
linuxTemporarily disable the vulnerable Arc data import feature until patching
Consult Nozomi Networks documentation for feature disablement procedures
Restrict User Access
allLimit Arc import functionality to trusted administrative users only
Review and modify user role permissions in Nozomi Networks administration interface
🧯 If You Can't Patch
- Implement strict file system permissions to limit write access to critical directories
- Monitor and audit all Arc import activities and file system changes
🔍 How to Verify
Check if Vulnerable:
Check if Arc import functionality is enabled and accessible to non-admin usersCheck Version:
Check Nozomi Networks administration interface for software versionVerify Fix Applied:
Verify installed version matches patched version from vendor advisory and test Arc import with malicious payload📡 Detection & Monitoring
Log Indicators:
- Unusual Arc import activities
- File write operations outside expected directories
- Multiple failed import attempts
Network Indicators:
- Unusual data uploads to Arc import endpoints
SIEM Query:
source="nozomi_logs" AND (event_type="arc_import" OR file_write_path CONTAINS "../")