CVE-2024-20742
📋 TL;DR
CVE-2024-20742 is an out-of-bounds read vulnerability in Substance3D Painter that could allow arbitrary code execution when a user opens a malicious file. Attackers could exploit this to run code with the victim's privileges. Users of Substance3D Painter versions 9.1.1 and earlier are affected.
💻 Affected Systems
- Adobe Substance3D Painter
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining the same privileges as the logged-in user, potentially leading to data theft, ransomware deployment, or lateral movement.
Likely Case
Local privilege escalation leading to unauthorized access to user files and system resources, with potential for persistence mechanisms.
If Mitigated
Limited impact with proper application sandboxing and user privilege restrictions, potentially only causing application crashes.
🎯 Exploit Status
Exploitation requires user interaction (opening malicious file) and knowledge of file format parsing.
🛠️ 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.
🔧 Temporary Workarounds
Restrict file opening
allOnly open Substance3D Painter files from trusted sources and disable automatic file associations
Application sandboxing
allRun Substance3D Painter in restricted mode or sandboxed environment
🧯 If You Can't Patch
- Implement application whitelisting to prevent execution of unauthorized code
- Use least privilege accounts for running Substance3D Painter and implement file integrity monitoring
🔍 How to Verify
Check if Vulnerable:
Check Substance3D Painter version in Help > About. If version is 9.1.1 or earlier, system is vulnerable.Check Version:
Open Substance3D Painter and navigate to Help > AboutVerify Fix Applied:
Verify version is 9.1.2 or later in Help > About and test opening known safe files.📡 Detection & Monitoring
Log Indicators:
- Application crashes with memory access violations
- Unexpected file parsing errors
- Unusual process creation from Substance3D Painter
Network Indicators:
- Unusual outbound connections after file opening
- File downloads from untrusted sources
SIEM Query:
Process creation where parent_process contains 'Substance3D Painter' AND process_name NOT IN (expected_process_list)