CVE-2021-43023
📋 TL;DR
This vulnerability in Adobe Premiere Rush allows attackers to execute arbitrary code on a user's system by tricking them into opening a malicious EPS or TIFF file. The vulnerability affects users of Adobe Premiere Rush version 1.5.16 and earlier. Successful exploitation requires user interaction but could lead to full system compromise.
💻 Affected Systems
- Adobe Premiere Rush
📦 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 unauthorized access to sensitive files, system configuration changes, or installation of additional malware.
If Mitigated
Limited impact with proper application sandboxing and user privilege restrictions, potentially only affecting user data within the application's scope.
🎯 Exploit Status
Exploitation requires user interaction to open a malicious file. No public exploit code has been identified, but the vulnerability is publicly documented.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.5.17 or later
Vendor Advisory: https://helpx.adobe.com/security/products/premiere_rush/apsb21-101.html
Restart Required: Yes
Instructions:
1. Open Adobe Premiere Rush. 2. Go to Help > Check for Updates. 3. Install any available updates. 4. Restart the application. 5. Verify version is 1.5.17 or higher.
🔧 Temporary Workarounds
Disable EPS/TIFF file association
allPrevent Premiere Rush from automatically opening EPS/TIFF files by changing file associations
Windows: Control Panel > Default Programs > Associate a file type or protocol with a program
macOS: Finder > Get Info > Open With > Change All
User awareness training
allEducate users not to open EPS/TIFF files from untrusted sources
🧯 If You Can't Patch
- Restrict user privileges to standard user accounts (not administrator)
- Implement application whitelisting to prevent unauthorized code execution
🔍 How to Verify
Check if Vulnerable:
Check Adobe Premiere Rush version in application settings or About dialogCheck Version:
Windows: wmic product where name="Adobe Premiere Rush" get version
macOS: /Applications/Adobe\ Premiere\ Rush.app/Contents/Info.plist | grep -A1 CFBundleShortVersionStringVerify Fix Applied:
Confirm version is 1.5.17 or higher after update📡 Detection & Monitoring
Log Indicators:
- Application crashes when opening EPS/TIFF files
- Unusual process spawning from Premiere Rush
Network Indicators:
- Outbound connections from Premiere Rush to unknown IPs after file opening
SIEM Query:
process_name:"Adobe Premiere Rush" AND (event_type:crash OR parent_process:"Adobe Premiere Rush")