CVE-2019-7131
📋 TL;DR
This CVE describes a type confusion vulnerability in Adobe Acrobat and Reader that could allow attackers to execute arbitrary code on affected systems. Users running vulnerable versions of Adobe Acrobat or Reader are at risk when opening malicious PDF files. The vulnerability affects multiple versions across different release tracks.
💻 Affected Systems
- Adobe Acrobat DC
- Adobe Acrobat Reader DC
- Adobe Acrobat 2017
- Adobe Acrobat Reader 2017
- Adobe Acrobat 2015
- Adobe Acrobat Reader 2015
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining full control over the affected system, potentially leading to data theft, ransomware deployment, or lateral movement within the network.
Likely Case
Malicious PDF files delivered via phishing emails or compromised websites lead to remote code execution, allowing attackers to install malware, steal credentials, or establish persistence.
If Mitigated
With proper security controls like application whitelisting, network segmentation, and user awareness training, impact is limited to isolated incidents that can be quickly contained.
🎯 Exploit Status
Type confusion vulnerabilities in PDF readers are commonly exploited through crafted PDF files. No authentication required - user just needs to open a malicious PDF.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2019.010.20069, 2017.011.30113, 2015.006.30464 or later
Vendor Advisory: https://helpx.adobe.com/security/products/acrobat/apsb19-02.html
Restart Required: Yes
Instructions:
1. Open Adobe Acrobat or Reader. 2. Go to Help > Check for Updates. 3. Follow prompts to install available updates. 4. Restart the application. 5. Verify update by checking Help > About Adobe Acrobat/Reader.
🔧 Temporary Workarounds
Disable JavaScript in Adobe Reader
allDisables JavaScript execution which may prevent some exploitation vectors
Edit > Preferences > JavaScript > Uncheck 'Enable Acrobat JavaScript'
Use Protected View
allForces PDFs to open in protected mode, limiting potential damage
Edit > Preferences > Security (Enhanced) > Enable Protected View at startup
🧯 If You Can't Patch
- Implement application whitelisting to block unauthorized executables
- Use network segmentation to isolate PDF processing systems from critical assets
🔍 How to Verify
Check if Vulnerable:
Check Adobe Acrobat/Reader version via Help > About Adobe Acrobat/Reader and compare with affected versionsCheck Version:
On Windows: wmic product where "name like 'Adobe Acrobat%' or name like 'Adobe Reader%'" get name, versionVerify Fix Applied:
Verify version is 2019.010.20069+, 2017.011.30113+, or 2015.006.30464+📡 Detection & Monitoring
Log Indicators:
- Unexpected process creation from AcroRd32.exe or Acrobat.exe
- Crash logs from Adobe processes
- Unusual file writes from PDF reader processes
Network Indicators:
- Outbound connections from PDF reader processes to suspicious IPs
- DNS requests for known malicious domains from systems running Adobe
SIEM Query:
process_name:AcroRd32.exe AND (parent_process:explorer.exe OR cmd.exe) AND process_command_line:*powershell* OR *cmd*