CVE-2024-20740
📋 TL;DR
CVE-2024-20740 is an out-of-bounds write vulnerability in Adobe Substance3D Painter that could allow arbitrary code execution when a user opens a malicious file. This affects users of Substance3D Painter versions 9.1.1 and earlier. Successful exploitation requires user interaction but could lead to full system compromise.
💻 Affected Systems
- Adobe Substance3D Painter
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system takeover with attacker gaining the same privileges as the current user, potentially leading to data theft, ransomware deployment, or persistent backdoor installation.
Likely Case
Local privilege escalation leading to malware installation or data exfiltration from the affected system.
If Mitigated
Limited impact with proper application sandboxing and user privilege restrictions, potentially only affecting the application's data.
🎯 Exploit Status
Exploitation requires user interaction (opening malicious file) and knowledge of file format manipulation. No public exploits known at this time.
🛠️ 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.
🔧 Temporary Workarounds
Restrict file opening
allOnly open Substance3D Painter files from trusted sources. Implement application control policies.
Run with reduced privileges
allRun Substance3D Painter with limited user privileges to reduce impact of successful exploitation.
🧯 If You Can't Patch
- Implement application whitelisting to prevent execution of unauthorized binaries
- Use network segmentation to isolate systems running vulnerable versions
🔍 How to Verify
Check if Vulnerable:
Check Substance3D Painter version in application settings or via Help > About. If version is 9.1.1 or earlier, system is vulnerable.Check Version:
On Windows: Check registry at HKEY_LOCAL_MACHINE\SOFTWARE\Adobe\Substance3D Painter\Version. On macOS/Linux: Check application bundle version.Verify Fix Applied:
Verify version is 9.1.2 or later in Help > About menu.📡 Detection & Monitoring
Log Indicators:
- Application crashes with memory access violations
- Unexpected file opening events in application logs
- Process spawning from Substance3D Painter
Network Indicators:
- Outbound connections from Substance3D Painter to unknown IPs
- DNS requests for suspicious domains after file opening
SIEM Query:
process_name:"Substance3D Painter.exe" AND (event_type:crash OR parent_process:unusual)