CVE-2023-39985
📋 TL;DR
CVE-2023-39985 is an out-of-bounds write vulnerability in Hitachi EH-VIEW (Designer) that allows local attackers to potentially execute arbitrary code by tricking users into opening malicious files. This vulnerability only affects products that are no longer supported by the maintainer, meaning no official patches will be released.
💻 Affected Systems
- Hitachi EH-VIEW (Designer)
📦 What is this software?
Eh View by Hitachi
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise through arbitrary code execution with the privileges of the user running EH-VIEW, potentially leading to data theft, ransomware deployment, or lateral movement within the network.
Likely Case
Local privilege escalation or malware execution on individual workstations where users open malicious files, potentially compromising sensitive data on those systems.
If Mitigated
Limited impact if proper application whitelisting, file integrity monitoring, and user awareness training prevent malicious file execution.
🎯 Exploit Status
Exploitation requires crafting malicious files and convincing users to open them. No public exploit code is known, but the vulnerability type (out-of-bounds write) is often exploitable for code execution.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: N/A
Vendor Advisory: https://www.hitachi.com/hirt/hitachi-sec/2023/002.html
Restart Required: No
Instructions:
No official patch available. The vendor states this affects unsupported products. Consider migrating to supported alternatives or implementing workarounds.
🔧 Temporary Workarounds
Application Control / Whitelisting
windowsPrevent execution of EH-VIEW using application control solutions to block the vulnerable software entirely.
N/A - Implementation depends on your endpoint protection platform
File Type Restrictions
windowsBlock or restrict opening of EH-VIEW project files (.ehv, .ehp extensions typically) from untrusted sources.
N/A - Configure via Group Policy or endpoint protection
🧯 If You Can't Patch
- Remove EH-VIEW from all systems and migrate to supported alternatives
- Implement strict user awareness training about opening files from untrusted sources
🔍 How to Verify
Check if Vulnerable:
Check if EH-VIEW (Designer) is installed on the system. If present and the product is no longer supported, assume vulnerable.Check Version:
Check installed programs in Control Panel or via 'wmic product get name,version' for EH-VIEWVerify Fix Applied:
Verify EH-VIEW has been removed or blocked via application control policies.📡 Detection & Monitoring
Log Indicators:
- Process creation events for EH-VIEW executable
- Application crash logs from EH-VIEW
- File access events for EH-VIEW project files
Network Indicators:
- N/A - Local exploitation only
SIEM Query:
Process creation where process_name contains 'eh-view' OR file_access where file_extension in ('ehv', 'ehp')