CVE-2023-26392
📋 TL;DR
CVE-2023-26392 is a use-after-free vulnerability in Adobe Substance 3D Stager that allows arbitrary code execution when a user opens a malicious file. This affects users of Substance 3D Stager version 2.0.1 and earlier, potentially compromising their systems.
💻 Affected Systems
- Adobe Substance 3D Stager
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining the same privileges as the current user, potentially leading to data theft, ransomware deployment, or lateral movement.
Likely Case
Local code execution allowing malware installation, credential theft, or data exfiltration from the affected system.
If Mitigated
No impact if users avoid opening untrusted files and have proper endpoint protection.
🎯 Exploit Status
Requires user interaction (opening malicious file) and knowledge of file format exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.0.2 or later
Vendor Advisory: https://helpx.adobe.com/security/products/substance3d_stager/apsb23-26.html
Restart Required: Yes
Instructions:
1. Open Adobe Substance 3D Stager. 2. Go to Help > Check for Updates. 3. Install version 2.0.2 or later. 4. Restart the application.
🔧 Temporary Workarounds
Restrict file opening
allConfigure application to only open trusted files from known sources.
Application control
allUse endpoint protection to block execution of malicious payloads.
🧯 If You Can't Patch
- Implement strict file opening policies and user training about untrusted files.
- Use application whitelisting to prevent execution of unauthorized code.
🔍 How to Verify
Check if Vulnerable:
Check Help > About in Substance 3D Stager - if version is 2.0.1 or earlier, you are vulnerable.Check Version:
Not applicable - check via application GUI.Verify Fix Applied:
Verify version is 2.0.2 or later in Help > About.📡 Detection & Monitoring
Log Indicators:
- Application crashes with memory access violations
- Unexpected child processes spawned from Substance 3D Stager
Network Indicators:
- Unusual outbound connections after opening Substance 3D files
SIEM Query:
Process creation where parent process contains 'stager' AND (process contains 'cmd' OR process contains 'powershell' OR process contains suspicious binary names)