CVE-2022-28838
📋 TL;DR
This CVE describes a use-after-free vulnerability in Adobe Acrobat Pro DC that could allow an attacker to execute arbitrary code on a victim's system. The vulnerability affects multiple versions across different release tracks and requires user interaction (opening a malicious PDF file) to exploit. Successful exploitation would run code with the current user's privileges.
💻 Affected Systems
- Adobe Acrobat Pro DC
📦 What is this software?
Acrobat by Adobe
Acrobat by Adobe
Acrobat by Adobe
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining the same privileges as the logged-in user, potentially leading to data theft, ransomware deployment, or lateral movement within the network.
Likely Case
Malicious code execution leading to data exfiltration, credential theft, or installation of persistent malware on the affected system.
If Mitigated
Limited impact due to proper patching, application sandboxing, and user awareness preventing malicious file execution.
🎯 Exploit Status
Exploitation requires user interaction (opening malicious file). No public exploit code available at disclosure.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 22.001.20142 and later for Continuous track, 20.005.3036x and later for Classic track, 17.012.3025x and later for 2017 track
Vendor Advisory: https://helpx.adobe.com/security/products/acrobat/apsb22-16.html
Restart Required: Yes
Instructions:
1. Open Adobe Acrobat Pro 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 Acrobat
allMany PDF-based exploits rely on JavaScript execution. Disabling JavaScript reduces attack surface.
Edit > Preferences > JavaScript > Uncheck 'Enable Acrobat JavaScript'
Use Protected View for untrusted files
allConfigure Acrobat to open untrusted files in Protected View mode.
Edit > Preferences > Security (Enhanced) > Check 'Enable Protected View at startup' and 'Enable Enhanced Security'
🧯 If You Can't Patch
- Implement application whitelisting to prevent execution of unauthorized PDF files
- Deploy network segmentation to limit lateral movement if exploitation occurs
🔍 How to Verify
Check if Vulnerable:
Check Adobe Acrobat version via Help > About Adobe Acrobat Pro DC and compare against affected versions.Check Version:
On Windows: wmic product where name="Adobe Acrobat Pro DC" get versionVerify Fix Applied:
Verify version is 22.001.20142 or higher (Continuous), 20.005.3036x or higher (Classic), or 17.012.3025x or higher (2017).📡 Detection & Monitoring
Log Indicators:
- Unexpected Acrobat crashes
- Suspicious child processes spawned from Acrobat
- Unusual file access patterns from Acrobat process
Network Indicators:
- Outbound connections from Acrobat to unknown IPs
- DNS requests for suspicious domains from Acrobat process
SIEM Query:
process_name:"Acrobat.exe" AND (event_id:1 OR event_id:4688) AND parent_process_name NOT IN ("explorer.exe", "Acrobat.exe")