CVE-2023-50190
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code by tricking users into opening malicious SKP files in Trimble SketchUp Viewer. The flaw exists in SKP file parsing where improper data validation enables buffer overflow attacks. All users of affected SketchUp Viewer versions are at risk.
💻 Affected Systems
- Trimble SketchUp Viewer
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining full control of the victim's computer, data theft, ransomware deployment, and lateral movement within networks.
Likely Case
Malware installation, data exfiltration, and persistence establishment on individual workstations, potentially leading to broader network compromise.
If Mitigated
Limited impact with proper application sandboxing and user privilege restrictions, potentially resulting in application crash rather than full system compromise.
🎯 Exploit Status
Exploitation requires user to open malicious file but no authentication needed. Weaponization likely given the nature of file format vulnerabilities.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Latest version from Trimble (specific version not specified in references)
Vendor Advisory: https://www.zerodayinitiative.com/advisories/ZDI-23-1840/
Restart Required: Yes
Instructions:
1. Open Trimble SketchUp Viewer
2. Navigate to Help > Check for Updates
3. Follow prompts to install latest version
4. Restart application after installation
🔧 Temporary Workarounds
Disable SKP file association
windowsPrevent SketchUp Viewer from automatically opening SKP files
Windows: Control Panel > Default Programs > Associate a file type or protocol with a program > Select .skp > Change program > Choose different application
Application sandboxing
allRun SketchUp Viewer in restricted environment
🧯 If You Can't Patch
- Implement application whitelisting to block SketchUp Viewer execution
- Use network segmentation to isolate systems running vulnerable software
🔍 How to Verify
Check if Vulnerable:
Check SketchUp Viewer version against latest release from Trimble official websiteCheck Version:
Windows: Open SketchUp Viewer > Help > About SketchUp ViewerVerify Fix Applied:
Verify version number matches or exceeds patched version from vendor advisory📡 Detection & Monitoring
Log Indicators:
- Application crashes with memory access violations
- Unexpected child processes spawned from SketchUp Viewer
- Unusual network connections from SketchUp Viewer process
Network Indicators:
- Outbound connections to suspicious IPs after opening SKP files
- DNS requests for known malicious domains from affected systems
SIEM Query:
process_name:"SketchUp Viewer" AND (event_id:1000 OR event_id:1001) OR process_parent:"SketchUp Viewer" AND process_name NOT IN (expected_child_processes)