CVE-2025-2634
📋 TL;DR
An out-of-bounds read vulnerability in NI LabVIEW's fontmgr component allows attackers to potentially disclose sensitive information or execute arbitrary code. This affects users who open maliciously crafted VI files in LabVIEW 2025 Q1 and earlier versions. Successful exploitation requires social engineering to trick users into opening specially crafted files.
💻 Affected Systems
- NI LabVIEW
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Arbitrary code execution with the privileges of the LabVIEW user, potentially leading to full system compromise, data theft, or lateral movement within the network.
Likely Case
Information disclosure through memory leaks, potentially exposing sensitive data or system information that could aid further attacks.
If Mitigated
Limited impact with proper user training and file validation controls in place, potentially resulting in application crashes but no code execution.
🎯 Exploit Status
Exploitation requires user interaction to open a malicious VI file. No public exploit code is currently available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: NI LabVIEW 2025 Q2 or later
Vendor Advisory: https://www.ni.com/en/support/security/available-critical-and-security-updates-for-ni-software/out-of-bounds-read-vulnerabilities-in-ni-labview.html
Restart Required: Yes
Instructions:
1. Download and install NI LabVIEW 2025 Q2 or later from NI's official website. 2. Restart the system after installation. 3. Verify the update was successful by checking the LabVIEW version.
🔧 Temporary Workarounds
Restrict VI file execution
allImplement application whitelisting to prevent execution of untrusted VI files
User awareness training
allTrain users to only open VI files from trusted sources and verify file integrity
🧯 If You Can't Patch
- Implement strict file validation policies to block untrusted VI files
- Use network segmentation to isolate LabVIEW systems from critical infrastructure
🔍 How to Verify
Check if Vulnerable:
Check LabVIEW version via Help > About LabVIEW. If version is 2025 Q1 or earlier, the system is vulnerable.Check Version:
On Windows: Check via LabVIEW GUI Help > About. On command line: Not directly available.Verify Fix Applied:
Verify LabVIEW version is 2025 Q2 or later via Help > About LabVIEW.📡 Detection & Monitoring
Log Indicators:
- Unexpected LabVIEW crashes
- Unusual file access patterns to VI files
- Memory access violations in system logs
Network Indicators:
- Unusual outbound connections from LabVIEW processes
- File transfers of VI files from untrusted sources
SIEM Query:
Process:labview.exe AND (EventID:1000 OR EventID:1001) OR FileExtension:.vi AND SourceIP:External