CVE-2020-9646
📋 TL;DR
CVE-2020-9646 is an out-of-bounds write vulnerability in Adobe Media Encoder that could allow attackers to execute arbitrary code on affected systems. Users running Adobe Media Encoder versions 14.2 and earlier are vulnerable. Successful exploitation requires user interaction, such as opening a malicious file.
💻 Affected Systems
- Adobe Media Encoder
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining full control of the affected machine, potentially leading to data theft, ransomware deployment, or lateral movement within the network.
Likely Case
Local privilege escalation or arbitrary code execution in the context of the current user, allowing attackers to install malware, steal credentials, or access sensitive files.
If Mitigated
Limited impact with proper security controls like application sandboxing, least privilege principles, and network segmentation preventing lateral movement.
🎯 Exploit Status
Exploitation requires user interaction (opening a malicious file). The vulnerability is in the core media processing functionality.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 14.3 and later
Vendor Advisory: https://helpx.adobe.com/security/products/media-encoder/apsb20-36.html
Restart Required: Yes
Instructions:
1. Open Adobe Media Encoder. 2. Go to Help > Updates. 3. Follow prompts to update to version 14.3 or later. 4. Restart the application after update completes.
🔧 Temporary Workarounds
Restrict file processing
allConfigure Adobe Media Encoder to only process files from trusted sources and disable automatic processing of unknown file types.
Application sandboxing
allRun Adobe Media Encoder in a sandboxed environment or virtual machine to limit potential damage from exploitation.
🧯 If You Can't Patch
- Remove Adobe Media Encoder from critical systems and use alternative media processing tools
- Implement strict application control policies to prevent execution of unauthorized media files
🔍 How to Verify
Check if Vulnerable:
Check Adobe Media Encoder version: Open application, go to Help > About Adobe Media Encoder. If version is 14.2 or earlier, system is vulnerable.Check Version:
On Windows: Check registry at HKEY_LOCAL_MACHINE\SOFTWARE\Adobe\Adobe Media Encoder\14.0\InstallPath. On macOS: Check /Applications/Adobe Media Encoder 2020/Adobe Media Encoder 2020.app/Contents/Info.plistVerify Fix Applied:
Verify version is 14.3 or later using same method. Check that no security updates are pending in Adobe Creative Cloud application.📡 Detection & Monitoring
Log Indicators:
- Unexpected crashes of Adobe Media Encoder
- Suspicious file processing activities
- Unusual process creation from Adobe Media Encoder
Network Indicators:
- Outbound connections from Adobe Media Encoder to unknown IPs
- DNS requests for suspicious domains from the application
SIEM Query:
Process Creation where Image contains 'Adobe Media Encoder' AND (CommandLine contains suspicious file extensions OR ParentImage != expected_parent_process)