CVE-2023-25011
📋 TL;DR
This vulnerability allows a standard user to write to the Windows registry with administrator privileges through NEC's PC settings tool. Attackers can modify system settings, install malware, or escalate privileges. Affects users running vulnerable versions of NEC's PC settings tool.
💻 Affected Systems
- NEC PC settings tool
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise through privilege escalation leading to persistent malware installation, data theft, or complete system control.
Likely Case
Local privilege escalation allowing attackers to modify system configurations, install unwanted software, or bypass security controls.
If Mitigated
Limited impact if proper user access controls and application whitelisting are implemented.
🎯 Exploit Status
Exploitation requires standard user access but no authentication beyond that. The vulnerability is in the tool's permission handling.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Ver10.1.27.0 or later, Ver11.0.23.0 or later
Vendor Advisory: https://jpn.nec.com/security-info/secinfo/nv23-001_en.html
Restart Required: Yes
Instructions:
1. Download the latest version from NEC's official website. 2. Uninstall the vulnerable version. 3. Install the patched version. 4. Restart the system.
🔧 Temporary Workarounds
Remove vulnerable software
windowsUninstall the NEC PC settings tool if not required for operations.
Control Panel > Programs > Uninstall a program > Select 'PC settings tool' > Uninstall
Restrict user permissions
windowsApply least privilege principles to limit standard user capabilities.
🧯 If You Can't Patch
- Implement application control policies to prevent execution of unauthorized software
- Monitor registry modification events for suspicious activity
🔍 How to Verify
Check if Vulnerable:
Check the installed version of 'PC settings tool' in Control Panel > Programs > Programs and Features.Check Version:
wmic product where name='PC settings tool' get versionVerify Fix Applied:
Verify the version is Ver10.1.27.0 or later, or Ver11.0.23.0 or later after patching.📡 Detection & Monitoring
Log Indicators:
- Registry modification events by standard users, particularly in HKLM hive
- Process execution of PC settings tool with elevated privileges
Network Indicators:
- No network indicators - this is a local privilege escalation
SIEM Query:
EventID=4657 OR EventID=4663 AND SubjectUserName NOT IN (Administrator, SYSTEM) AND RegistryKeyPath CONTAINS 'HKLM'