CVE-2021-42526
📋 TL;DR
Adobe Premiere Elements versions 20210809.daily.2242976 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. Exploitation requires user interaction, such as opening a specially crafted file.
💻 Affected Systems
- Adobe Premiere Elements
📦 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 due to user account restrictions, potentially only application crash or denial of service.
🎯 Exploit Status
Exploitation requires user interaction and successful file parsing. No public exploit code has been disclosed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Update to version 20210809.daily.2242977 or later
Vendor Advisory: https://helpx.adobe.com/security/products/premiere_elements/apsb21-106.html
Restart Required: Yes
Instructions:
1. Open Adobe Premiere Elements. 2. Go to Help > Updates. 3. Install available updates. 4. Restart the application.
🔧 Temporary Workarounds
Restrict file handling
allConfigure application to only open trusted file types or from trusted sources
User awareness training
allEducate users about risks of opening untrusted media files
🧯 If You Can't Patch
- Restrict user permissions to limit impact of code execution
- Implement application whitelisting to prevent unauthorized execution
🔍 How to Verify
Check if Vulnerable:
Check Help > About in Adobe Premiere Elements for version numberCheck Version:
Not applicable - check via application GUIVerify Fix Applied:
Verify version is 20210809.daily.2242977 or later after update📡 Detection & Monitoring
Log Indicators:
- Application crashes with memory access violations
- Unexpected child processes spawned from Premiere Elements
Network Indicators:
- Unusual outbound connections from Premiere Elements process
SIEM Query:
Process creation where parent process contains 'premiere' AND (command line contains suspicious file paths OR destination IP is external)