CVE-2024-20744
📋 TL;DR
Substance3D Painter versions 9.1.1 and earlier contain an out-of-bounds write vulnerability that could allow arbitrary code execution when a user opens a malicious file. This affects users of Adobe's Substance3D Painter software who work with untrusted project files. Successful exploitation requires user interaction to open a specially crafted file.
💻 Affected Systems
- Adobe Substance3D Painter
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining the same privileges as the logged-in user, potentially leading to data theft, ransomware deployment, or lateral movement within the network.
Likely Case
Local privilege escalation leading to malware installation, data exfiltration, or persistence mechanisms being established on the affected workstation.
If Mitigated
Limited impact due to proper application sandboxing, least privilege principles, and network segmentation preventing lateral movement.
🎯 Exploit Status
Exploitation requires user interaction to open malicious files. No public exploit code has been disclosed as of the advisory date.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 9.1.2 or later
Vendor Advisory: https://helpx.adobe.com/security/products/substance3d_painter/apsb24-04.html
Restart Required: Yes
Instructions:
1. Open Substance3D Painter. 2. Go to Help > Check for Updates. 3. Follow prompts to install version 9.1.2 or later. 4. Restart the application after installation completes.
🔧 Temporary Workarounds
Restrict file opening
allOnly open Substance3D Painter project files from trusted sources. Implement application control policies to prevent opening of untrusted files.
Run with reduced privileges
allRun Substance3D Painter with standard user privileges rather than administrative rights to limit potential impact of exploitation.
🧯 If You Can't Patch
- Implement application whitelisting to prevent execution of unauthorized binaries that could result from exploitation
- Use network segmentation to isolate workstations running vulnerable versions from critical systems
🔍 How to Verify
Check if Vulnerable:
Check Substance3D Painter version in application (Help > About). If version is 9.1.1 or earlier, the system is vulnerable.Check Version:
On Windows: Check application version in Control Panel > Programs and Features. On macOS: Check in Applications folder > Get Info. In-app: Help > About Substance3D Painter.Verify Fix Applied:
Verify version is 9.1.2 or later in Help > About menu. Test opening known-good project files to ensure functionality.📡 Detection & Monitoring
Log Indicators:
- Application crashes with memory access violations
- Unexpected child processes spawned from Substance3D Painter
- Unusual file system activity from the application
Network Indicators:
- Unexpected outbound connections from Substance3D Painter process
- DNS requests to suspicious domains following file opening
SIEM Query:
Process creation where parent_process_name contains 'Substance3D Painter' AND (process_name not in ['expected_child_processes']) OR Application crash logs containing 'Substance3D Painter' AND 'access violation'