CVE-2025-15350
📋 TL;DR
A deserialization vulnerability in Anritsu VectorStar's CHX file parser allows remote attackers to execute arbitrary code when a user opens a malicious CHX file or visits a malicious webpage. This affects all installations of Anritsu VectorStar that process CHX files. Attackers can gain code execution in the context of the current user process.
💻 Affected Systems
- Anritsu VectorStar
📦 What is this software?
Vectorstar by Anritsu
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining the same privileges as the user running VectorStar, potentially leading to lateral movement, data theft, or ransomware deployment.
Likely Case
Local privilege escalation or malware execution on the affected system, potentially compromising sensitive measurement data and network-connected equipment.
If Mitigated
Limited impact with proper application sandboxing and user privilege restrictions, though data integrity may still be compromised.
🎯 Exploit Status
Exploitation requires user interaction but uses common deserialization techniques. ZDI-CAN-27039 tracking suggests active research.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Anritsu security advisory for specific patched version
Vendor Advisory: https://www.anritsu.com/en-us/support/security-advisories
Restart Required: Yes
Instructions:
1. Check Anritsu security advisory for patch availability
2. Download and install the latest VectorStar update
3. Restart the application and system
4. Verify patch installation
🔧 Temporary Workarounds
Restrict CHX file handling
windowsBlock or restrict processing of CHX files through application controls or file association changes
Application sandboxing
windowsRun VectorStar with reduced privileges using application control solutions
🧯 If You Can't Patch
- Implement strict network segmentation for VectorStar systems
- Use application whitelisting to prevent unauthorized code execution
🔍 How to Verify
Check if Vulnerable:
Check VectorStar version against patched version in Anritsu advisoryCheck Version:
Check VectorStar 'About' dialog or installation directory version informationVerify Fix Applied:
Verify installed version matches or exceeds patched version from vendor advisory📡 Detection & Monitoring
Log Indicators:
- Unexpected process creation from VectorStar
- CHX file parsing errors or crashes
- Unusual network connections from VectorStar process
Network Indicators:
- Outbound connections from VectorStar to unexpected destinations
- DNS requests for suspicious domains from VectorStar host
SIEM Query:
Process Creation where Parent Process contains 'VectorStar' AND Command Line contains suspicious patterns