CVE-2023-21582
📋 TL;DR
CVE-2023-21582 is an out-of-bounds write vulnerability in Adobe Digital Editions that could allow arbitrary code execution when a user opens a malicious file. This affects users running Adobe Digital Editions version 4.5.11.187303 or earlier. Attackers could gain control of the victim's system with the same privileges as the current user.
💻 Affected Systems
- Adobe Digital Editions
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining complete control of the victim's computer, potentially leading to data theft, ransomware deployment, or persistent backdoor installation.
Likely Case
Local privilege escalation leading to data exfiltration, credential theft, or installation of additional malware on the affected system.
If Mitigated
Limited impact with proper application sandboxing and user privilege restrictions, potentially containing the exploit to the application context.
🎯 Exploit Status
Exploitation requires user interaction (opening malicious file). No public exploit code available at disclosure time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.5.12 or later
Vendor Advisory: https://helpx.adobe.com/security/products/Digital-Editions/apsb23-04.html
Restart Required: Yes
Instructions:
1. Open Adobe Digital Editions. 2. Go to Help > Check for Updates. 3. Follow prompts to install update. 4. Restart application. Alternatively, download latest version from Adobe website.
🔧 Temporary Workarounds
Disable automatic file opening
allConfigure system to not automatically open files with Adobe Digital Editions
User awareness training
allTrain users to only open files from trusted sources
🧯 If You Can't Patch
- Restrict user privileges to standard user accounts (not administrator)
- Implement application whitelisting to prevent execution of unauthorized binaries
🔍 How to Verify
Check if Vulnerable:
Check Adobe Digital Editions version in Help > About. If version is 4.5.11.187303 or earlier, system is vulnerable.Check Version:
On Windows: Check Help > About in Adobe Digital Editions GUI. No direct command-line version check available.Verify Fix Applied:
Verify version is 4.5.12 or later in Help > About. Test opening known safe files to ensure functionality.📡 Detection & Monitoring
Log Indicators:
- Application crashes in Adobe Digital Editions
- Unusual file access patterns from Adobe Digital Editions process
Network Indicators:
- Outbound connections from Adobe Digital Editions to unknown IPs after file opening
SIEM Query:
Process:Adobe Digital Editions AND (EventID:1000 OR EventID:1001) OR FileAccess:*malicious*