CVE-2021-40702
📋 TL;DR
Adobe Premiere Elements versions 2021.2235820 and earlier contain a memory corruption vulnerability when processing malicious PSD files. This could allow attackers to execute arbitrary code with the privileges of the current user. Exploitation requires user interaction, such as opening a specially crafted PSD file.
💻 Affected Systems
- Adobe Premiere Elements
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise via arbitrary code execution with user privileges, potentially leading to data theft, ransomware deployment, or lateral movement.
Likely Case
Local privilege escalation or malware installation if user opens malicious PSD file, potentially leading to data exfiltration or system disruption.
If Mitigated
Limited impact with proper user training and security controls, potentially just application crash or denial of service.
🎯 Exploit Status
Exploitation requires user to open malicious PSD file. No public exploit code available at time of advisory.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2021.2235820.1 or later
Vendor Advisory: https://helpx.adobe.com/security/products/premiere_elements/apsb21-78.html
Restart Required: Yes
Instructions:
1. Open Adobe Premiere Elements. 2. Go to Help > Updates. 3. Install available updates. 4. Restart application. Alternatively, download latest version from Adobe website.
🔧 Temporary Workarounds
Disable PSD file association
allPrevent Premiere Elements from automatically opening PSD files
Windows: Control Panel > Default Programs > Associate a file type > Remove .psd association
macOS: Right-click .psd file > Get Info > Open With > Change to different application
User training and awareness
allEducate users not to open PSD files from untrusted sources
🧯 If You Can't Patch
- Restrict user permissions to limit impact of code execution
- Implement application whitelisting to prevent unauthorized executables
🔍 How to Verify
Check if Vulnerable:
Check Premiere Elements version: Help > About Premiere Elements. If version is 2021.2235820 or earlier, system is vulnerable.Check Version:
Not applicable - check via application GUIVerify Fix Applied:
Verify version is 2021.2235820.1 or later in Help > About Premiere Elements.📡 Detection & Monitoring
Log Indicators:
- Application crashes when opening PSD files
- Unexpected process creation from Premiere Elements
Network Indicators:
- Outbound connections from Premiere Elements to unusual destinations
SIEM Query:
Process creation where parent process contains 'premiere elements' AND (command line contains '.psd' OR file path contains '.psd')