CVE-2022-28230
📋 TL;DR
CVE-2022-28230 is a use-after-free vulnerability in Adobe Acrobat Reader DC's acroform event processing that could allow arbitrary code execution when a user opens a malicious PDF file. This affects users of Adobe Acrobat Reader DC versions 22.001.20085 and earlier, 20.005.3031x and earlier, and 17.012.30205 and earlier. Successful exploitation requires user interaction through opening a malicious file.
💻 Affected Systems
- Adobe Acrobat Reader DC
📦 What is this software?
Acrobat by Adobe
Acrobat by Adobe
Acrobat by Adobe
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining the same privileges as the current user, potentially leading to data theft, ransomware deployment, or lateral movement within the network.
Likely Case
Malicious code execution in the context of the current user, allowing data exfiltration, credential theft, or installation of additional malware.
If Mitigated
Limited impact with proper application sandboxing, least privilege user accounts, and network segmentation preventing lateral movement.
🎯 Exploit Status
Exploitation requires user interaction (opening malicious file). No public exploit code was available at disclosure time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 22.001.20085 (Continuous Track), 20.005.30314 (Classic Track), 17.012.30205 (Classic Track 2017)
Vendor Advisory: https://helpx.adobe.com/security/products/acrobat/apsb22-16.html
Restart Required: Yes
Instructions:
1. Open Adobe Acrobat Reader DC. 2. Go to Help > Check for Updates. 3. Follow prompts to install available updates. 4. Restart the application when prompted.
🔧 Temporary Workarounds
Disable JavaScript in Adobe Reader
allPrevents JavaScript execution which may be used in exploitation chains
Edit > Preferences > JavaScript > Uncheck 'Enable Acrobat JavaScript'
Use Protected View
allOpen PDFs in Protected View mode to limit potential damage
File > Open > Check 'Open in Protected View' or set as default in Preferences > Security (Enhanced)
🧯 If You Can't Patch
- Implement application whitelisting to block unauthorized PDF readers
- Use network segmentation to isolate PDF processing systems
- Deploy endpoint detection and response (EDR) to monitor for exploitation attempts
- Educate users about phishing risks and safe file handling
🔍 How to Verify
Check if Vulnerable:
Check Adobe Reader version via Help > About Adobe Acrobat Reader DC and compare with affected versionsCheck Version:
On Windows: wmic product where name="Adobe Acrobat Reader DC" get versionVerify Fix Applied:
Verify version is updated to 22.001.20085 or later (Continuous), 20.005.30314 or later (Classic), or 17.012.30205 or later (Classic 2017)📡 Detection & Monitoring
Log Indicators:
- Adobe Reader crash logs with exception codes
- Unexpected child processes spawned from Adobe Reader
- Suspicious file access patterns from Adobe Reader process
Network Indicators:
- Unexpected outbound connections from Adobe Reader process
- DNS requests to suspicious domains following PDF opening
SIEM Query:
process_name:"AcroRd32.exe" AND (event_id:1000 OR parent_process_name:"AcroRd32.exe")