CVE-2021-40740
📋 TL;DR
Adobe Audition versions 14.4 and earlier contain a memory corruption vulnerability when processing M4A audio files. This could allow attackers to execute arbitrary code with the privileges of the current user. Exploitation requires user interaction, such as opening a malicious M4A file.
💻 Affected Systems
- Adobe Audition
📦 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 on the user's system when a malicious M4A file is opened.
If Mitigated
Limited impact if user doesn't open untrusted M4A files or if application runs with restricted privileges.
🎯 Exploit Status
Requires user to open malicious M4A file. No public exploit code available as of advisory publication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 14.4.1 or later
Vendor Advisory: https://helpx.adobe.com/security/products/audition/apsb21-92.html
Restart Required: Yes
Instructions:
1. Open Adobe Creative Cloud application. 2. Navigate to 'Apps' tab. 3. Find Adobe Audition and click 'Update'. 4. Alternatively, download installer from Adobe website. 5. Restart system after installation.
🔧 Temporary Workarounds
Disable M4A file association
allPrevent Audition from automatically opening M4A files
Windows: Control Panel > Default Programs > Associate a file type > Select .m4a > Change program
macOS: Right-click .m4a file > Get Info > Open with > Select different application
Restrict file execution
allUse application control to block execution of untrusted M4A files
🧯 If You Can't Patch
- Implement strict email filtering to block M4A attachments from untrusted sources
- Educate users not to open M4A files from unknown or untrusted sources
🔍 How to Verify
Check if Vulnerable:
Check Adobe Audition version: Help > About Adobe Audition. If version is 14.4 or earlier, system is vulnerable.Check Version:
Windows: wmic product where name="Adobe Audition" get version
macOS: /Applications/Adobe Audition 2021/Adobe Audition 2021.app/Contents/Info.plist | grep -A1 CFBundleShortVersionStringVerify Fix Applied:
Verify version is 14.4.1 or later in Help > About Adobe Audition.📡 Detection & Monitoring
Log Indicators:
- Application crashes when processing M4A files
- Unexpected process creation from Audition.exe
Network Indicators:
- Outbound connections from Audition to unknown IPs post-M4A file opening
SIEM Query:
source="*audition*" AND (event="crash" OR event="error") AND file_extension="m4a"