CVE-2022-28236
📋 TL;DR
This CVE describes an out-of-bounds write vulnerability in Adobe Acrobat Reader 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. Users of affected Acrobat Reader DC versions are at risk.
💻 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
Complete system compromise with attacker gaining full control of the victim's computer in the context of the current user, potentially leading to data theft, ransomware deployment, or lateral movement within the network.
Likely Case
Malicious PDF files delivered via phishing emails or malicious websites lead to malware installation, credential theft, or system compromise when opened by users.
If Mitigated
With proper patching and security controls, the risk is limited to isolated incidents that can be contained through endpoint detection and user awareness training.
🎯 Exploit Status
Exploitation requires user interaction (opening a malicious PDF file). No public proof-of-concept has been disclosed as of the advisory date.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 22.001.20085 (continuous track), 20.005.30314 (classic track), 17.012.30206 (2017 track)
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 the prompts to download and install the latest version. 4. Restart the application when prompted.
🔧 Temporary Workarounds
Disable JavaScript in Adobe Reader
allDisabling JavaScript can prevent exploitation of many PDF-based vulnerabilities
Edit > Preferences > JavaScript > Uncheck 'Enable Acrobat JavaScript'
Use Protected View
allEnable Protected View for files from potentially unsafe locations
Edit > Preferences > Security (Enhanced) > Enable Protected View for files originating from the Internet
🧯 If You Can't Patch
- Implement application whitelisting to block execution of unauthorized PDF files
- Deploy endpoint detection and response (EDR) solutions to detect malicious PDF behavior
🔍 How to Verify
Check if Vulnerable:
Check Help > About Adobe Acrobat Reader DC and compare version against affected rangesCheck Version:
On Windows: wmic product where name="Adobe Acrobat Reader DC" get versionVerify Fix Applied:
Verify version is 22.001.20085 or higher (continuous), 20.005.30314 or higher (classic), or 17.012.30206 or higher (2017)📡 Detection & Monitoring
Log Indicators:
- Unexpected process creation from AcroRd32.exe
- Memory access violations in application logs
- PDF file opening events followed by suspicious network connections
Network Indicators:
- Outbound connections from Acrobat Reader to unknown IPs
- DNS requests for suspicious domains following PDF opening
SIEM Query:
process_name:"AcroRd32.exe" AND (event_type:"process_creation" OR event_type:"network_connection")