CVE-2021-21076
📋 TL;DR
Adobe Animate versions 21.0.3 and earlier contain an out-of-bounds read vulnerability that could allow an attacker to read sensitive memory contents. This requires user interaction where a victim opens a malicious file. Users of affected Adobe Animate versions are at risk.
💻 Affected Systems
- Adobe Animate
📦 What is this software?
Animate by Adobe
⚠️ Risk & Real-World Impact
Worst Case
Complete memory disclosure leading to credential theft, session hijacking, or system compromise via chained exploits.
Likely Case
Limited information disclosure from application memory, potentially exposing user data or system information.
If Mitigated
No impact if users don't open untrusted files or if the application is patched.
🎯 Exploit Status
Exploitation requires user interaction (opening malicious file) but no authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 21.0.4 or later
Vendor Advisory: https://helpx.adobe.com/security/products/animate/apsb21-21.html
Restart Required: Yes
Instructions:
1. Open Adobe Animate. 2. Go to Help > Updates. 3. Install available updates to version 21.0.4 or later. 4. Restart the application.
🔧 Temporary Workarounds
Restrict file opening
allConfigure application to only open trusted files or disable automatic file opening.
🧯 If You Can't Patch
- Restrict user permissions to limit damage from information disclosure
- Implement application control to prevent execution of untrusted files
🔍 How to Verify
Check if Vulnerable:
Check Adobe Animate version in Help > About Adobe AnimateCheck Version:
Not applicable - check via application GUIVerify Fix Applied:
Verify version is 21.0.4 or later in Help > About Adobe Animate📡 Detection & Monitoring
Log Indicators:
- Application crashes, unexpected file access patterns
Network Indicators:
- Downloads of suspicious animation files
SIEM Query:
EventID=4688 AND ProcessName='Animate.exe' AND CommandLine LIKE '%.fla' OR '%.xfl'