CVE-2021-40794
📋 TL;DR
Adobe Premiere Pro versions 15.4.1 and earlier contain a memory corruption vulnerability when processing malicious files. This could allow attackers to execute arbitrary code with the privileges of the current user. Users who open untrusted project files are at risk.
💻 Affected Systems
- Adobe Premiere Pro
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise via arbitrary code execution leading to data theft, ransomware deployment, or persistent backdoor installation.
Likely Case
Local privilege escalation leading to user account compromise and potential lateral movement within the network.
If Mitigated
Limited impact if user runs with minimal privileges and file execution is blocked by security controls.
🎯 Exploit Status
Exploitation requires user to open a malicious file. No public exploit code is known.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 15.4.2 or later
Vendor Advisory: https://helpx.adobe.com/security/products/premiere_pro/apsb21-100.html
Restart Required: Yes
Instructions:
1. Open Adobe Creative Cloud application. 2. Navigate to 'Apps' tab. 3. Find Premiere Pro and click 'Update'. 4. Restart Premiere Pro after update completes.
🔧 Temporary Workarounds
Restrict file opening
allConfigure Premiere Pro to only open trusted project files from known sources.
Run with reduced privileges
allRun Premiere Pro with standard user privileges instead of administrator rights.
🧯 If You Can't Patch
- Implement application whitelisting to block execution of malicious files
- Use network segmentation to isolate Premiere Pro workstations from critical systems
🔍 How to Verify
Check if Vulnerable:
Check Premiere Pro version via Help > About Premiere Pro. If version is 15.4.1 or earlier, system is vulnerable.Check Version:
On Windows: wmic product where name="Adobe Premiere Pro" get version
On macOS: /Applications/Adobe\ Premiere\ Pro\ */Adobe\ Premiere\ Pro.app/Contents/Info.plistVerify Fix Applied:
Verify version is 15.4.2 or later in Help > About Premiere Pro.📡 Detection & Monitoring
Log Indicators:
- Premiere Pro crash logs with memory access violations
- Unexpected child processes spawned from Premiere Pro
Network Indicators:
- Unusual outbound connections from Premiere Pro process
SIEM Query:
process_name:"Adobe Premiere Pro.exe" AND (event_type:crash OR child_process_count > 3)