CVE-2019-8169
📋 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. The vulnerability affects multiple versions across different release tracks. Users who open malicious PDF files with vulnerable versions are at risk.
💻 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 victim's computer, potentially leading to data theft, ransomware deployment, or lateral movement within networks.
Likely Case
Malicious PDF files delivered via phishing emails or compromised websites lead to malware installation, credential theft, or system disruption.
If Mitigated
With proper patching and security controls, impact is limited to failed exploitation attempts that trigger security alerts.
🎯 Exploit Status
Type confusion vulnerabilities in PDF readers are commonly exploited via crafted PDF files. No public exploit code is known, but similar vulnerabilities have been weaponized in the past.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2019.012.20048, 2017.011.30156, 2015.006.30511 or later
Vendor Advisory: https://helpx.adobe.com/security/products/acrobat/apsb19-49.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 when prompted.
🔧 Temporary Workarounds
Disable JavaScript in Adobe Reader
allDisabling JavaScript reduces attack surface as many PDF exploits rely on JavaScript execution.
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 at startup
🧯 If You Can't Patch
- Implement application whitelisting to block execution of unauthorized PDF readers
- Use sandboxed PDF viewers or convert PDFs to safer formats before opening
🔍 How to Verify
Check if Vulnerable:
Check Help > About Adobe Acrobat/Reader and compare version against affected ranges.Check Version:
On Windows: wmic product where "name like 'Adobe Acrobat%'" get versionVerify Fix Applied:
Verify version is 2019.012.20048+, 2017.011.30156+, or 2015.006.30511+.📡 Detection & Monitoring
Log Indicators:
- Application crashes in Adobe Reader/Acrobat
- Unusual process creation from AcroRd32.exe or Acrobat.exe
- Security software alerts for PDF file execution
Network Indicators:
- Outbound connections from PDF reader to suspicious IPs
- DNS requests for known malicious domains after PDF opening
SIEM Query:
source="*acrobat*" OR process="AcroRd32.exe" AND (event_type="crash" OR parent_process!="explorer.exe")