CVE-2021-42737
📋 TL;DR
Adobe Prelude versions 10.1 and earlier contain a memory corruption vulnerability when processing malicious WAV files. This could allow attackers to execute arbitrary code with the privileges of the current user. Users who open specially crafted WAV files are affected.
💻 Affected Systems
- Adobe Prelude
📦 What is this software?
Prelude by Adobe
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise via arbitrary code execution leading to data theft, ransomware deployment, or persistent backdoor installation.
Likely Case
Local privilege escalation leading to unauthorized access to sensitive files and system resources.
If Mitigated
Limited impact with proper user training and application sandboxing, potentially only application crash.
🎯 Exploit Status
Exploitation requires user interaction (opening malicious file). Memory corruption vulnerabilities typically require skilled exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 10.1.1 or later
Vendor Advisory: https://helpx.adobe.com/security/products/prelude/apsb21-96.html
Restart Required: Yes
Instructions:
1. Open Adobe Creative Cloud application. 2. Navigate to 'Apps' tab. 3. Find Adobe Prelude and click 'Update'. 4. Restart computer after installation completes.
🔧 Temporary Workarounds
File Type Restriction
allBlock WAV files from untrusted sources using file extension filtering or application control policies.
Application Sandboxing
allRun Adobe Prelude in restricted mode or sandboxed environment to limit potential damage.
🧯 If You Can't Patch
- Implement application whitelisting to prevent execution of unauthorized code
- Educate users to never open WAV files from untrusted sources
🔍 How to Verify
Check if Vulnerable:
Check Adobe Prelude version in Help > About Adobe Prelude. If version is 10.1 or earlier, system is vulnerable.Check Version:
On Windows: Check 'About Adobe Prelude' in application menu. On macOS: Adobe Prelude > About Adobe PreludeVerify Fix Applied:
Verify version is 10.1.1 or later in Help > About Adobe Prelude.📡 Detection & Monitoring
Log Indicators:
- Application crashes when opening WAV files
- Unusual process creation from Adobe Prelude
Network Indicators:
- Outbound connections from Adobe Prelude to suspicious IPs
SIEM Query:
source="*prelude*" AND (event_type="crash" OR process_name="cmd.exe" OR process_name="powershell.exe")