CVE-2022-28232
📋 TL;DR
This CVE describes a use-after-free vulnerability in Adobe Acrobat Reader DC that could allow arbitrary code execution when a user opens a malicious PDF file. The vulnerability affects multiple versions across different release tracks. Successful exploitation requires user interaction to open 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 PDF files delivered via phishing or compromised websites lead to malware installation or credential theft on individual workstations.
If Mitigated
With proper patching and security controls, impact is limited to isolated incidents that can be contained through endpoint detection and response.
🎯 Exploit Status
Exploitation requires user interaction (opening a malicious PDF). No public exploit code was available at the time of the advisory.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 22.001.20085 (for Continuous track), 20.005.30314 (for 2020 Classic track), 17.012.30206 (for 2017 Classic 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 prompts to install available updates. 4. Restart the application. Alternatively, download and install the latest version from Adobe's website.
🔧 Temporary Workarounds
Disable JavaScript in Adobe Reader
allPrevents exploitation by disabling JavaScript execution in PDF files
Edit > Preferences > JavaScript > Uncheck 'Enable Acrobat JavaScript'
Use Protected View
allOpen untrusted PDFs in Protected View mode to limit potential damage
File > Open > Select 'Protected View' option when opening untrusted files
🧯 If You Can't Patch
- Implement application whitelisting to block unauthorized PDF readers
- Use network segmentation to isolate PDF processing workstations
🔍 How to Verify
Check if Vulnerable:
Check Adobe Reader version via Help > About Adobe Acrobat Reader DC and compare against affected versionsCheck Version:
On Windows: wmic product where "name like 'Adobe Acrobat Reader DC%'" get versionVerify Fix Applied:
Verify version is updated to 22.001.20085 or higher (Continuous), 20.005.30314 or higher (2020 Classic), or 17.012.30206 or higher (2017 Classic)📡 Detection & Monitoring
Log Indicators:
- Unexpected process crashes of AcroRd32.exe
- Suspicious child processes spawned from Adobe Reader
Network Indicators:
- Outbound connections from Adobe Reader to unexpected destinations
- DNS requests for known malicious domains following PDF opening
SIEM Query:
process_name:"AcroRd32.exe" AND (event_id:1000 OR parent_process_name:"AcroRd32.exe")