CVE-2025-2449
📋 TL;DR
This vulnerability in NI FlexLogger's usiReg component allows remote attackers to create arbitrary files via directory traversal in URI file parsing. Attackers can execute code in the context of the current user by tricking them into visiting a malicious page or opening a malicious file. All installations of affected NI FlexLogger versions are vulnerable.
💻 Affected Systems
- NI FlexLogger
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with current user privileges leading to full system compromise, data theft, and lateral movement within the network.
Likely Case
File creation and manipulation leading to data corruption, privilege escalation, or persistence mechanisms being established.
If Mitigated
Limited impact due to user awareness training preventing malicious file/page interaction, with proper file system permissions restricting damage.
🎯 Exploit Status
Requires social engineering to deliver malicious content. Exploit involves crafting malicious URI files to trigger directory traversal.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check NI security advisory for specific patched version
Vendor Advisory: https://www.ni.com/en/support/security/available-critical-and-security-updates.html
Restart Required: No
Instructions:
1. Check NI security advisory for affected versions. 2. Download and install latest NI FlexLogger update from NI website. 3. Verify installation completes successfully.
🔧 Temporary Workarounds
Restrict URI file handling
windowsConfigure system to not automatically open .uri files with NI FlexLogger or usiReg component
Associate .uri files with alternative applications via Windows default apps settings
User awareness training
allEducate users not to open unexpected URI files or visit untrusted websites
🧯 If You Can't Patch
- Implement application whitelisting to prevent unauthorized executables from running
- Use least privilege principles - run NI FlexLogger with restricted user accounts
🔍 How to Verify
Check if Vulnerable:
Check NI FlexLogger version against vendor advisory. Look for usiReg component processing .uri files.Check Version:
Check NI FlexLogger 'About' dialog or installed programs list for version numberVerify Fix Applied:
Verify NI FlexLogger version is updated to patched version per vendor advisory. Test URI file handling.📡 Detection & Monitoring
Log Indicators:
- Unusual file creation in system directories
- NI FlexLogger process spawning unexpected child processes
- Access to .uri files from unusual locations
Network Indicators:
- Downloads of .uri files from external sources
- Outbound connections from NI FlexLogger process
SIEM Query:
Process creation where parent_process contains 'FlexLogger' OR File creation where file_path contains '..\' and process contains 'FlexLogger'