CVE-2023-26383
📋 TL;DR
CVE-2023-26383 is a stack-based buffer overflow vulnerability in Adobe Substance 3D Stager that allows arbitrary code execution when a user opens a malicious file. Attackers can exploit this to run code with the victim's privileges, potentially compromising their system. Users of Adobe Substance 3D Stager version 2.0.1 and earlier are affected.
💻 Affected Systems
- Adobe Substance 3D Stager
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining full control of the victim's machine, data theft, ransomware deployment, or lateral movement within the network.
Likely Case
Local privilege escalation leading to malware installation, credential theft, 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). No public exploit code has been disclosed as of the advisory date.
🛠️ 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. Follow prompts to install version 2.0.2 or later. 4. Restart the application after installation completes.
🔧 Temporary Workarounds
Restrict file opening
allOnly open Substance 3D Stager files from trusted sources and avoid opening unknown or suspicious files.
Application sandboxing
allRun Adobe Substance 3D Stager in a sandboxed environment or virtual machine to limit potential damage from exploitation.
🧯 If You Can't Patch
- Implement application whitelisting to prevent execution of unauthorized code
- Use endpoint detection and response (EDR) solutions to monitor for suspicious file opening behavior
🔍 How to Verify
Check if Vulnerable:
Check Adobe Substance 3D Stager version in Help > About. If version is 2.0.1 or earlier, the system is vulnerable.Check Version:
Not applicable - check version through application GUIVerify Fix Applied:
Verify Adobe Substance 3D Stager version is 2.0.2 or later in Help > About after applying updates.📡 Detection & Monitoring
Log Indicators:
- Unexpected application crashes
- Suspicious file opening events from Substance 3D Stager
- Unusual process creation from Substance 3D Stager
Network Indicators:
- Outbound connections from Substance 3D Stager to unknown IPs following file opening
- DNS requests to suspicious domains
SIEM Query:
source="*" (process_name="Substance3DStager.exe" OR process_name="Adobe Substance 3D Stager") AND (event_type="process_creation" OR event_type="file_open")