CVE-2019-8197
📋 TL;DR
This CVE describes a critical heap overflow vulnerability in Adobe Acrobat and Reader that allows attackers to execute arbitrary code on affected systems. Attackers can exploit this vulnerability by tricking users into opening malicious PDF files. All users running vulnerable versions of Adobe Acrobat or Reader are affected.
💻 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, enabling 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 security controls, exploitation attempts are blocked by endpoint protection, network filtering, and user awareness training.
🎯 Exploit Status
Exploitation requires user interaction to open malicious PDF but no authentication. CVSS 9.8 indicates trivial exploitation with high impact.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Acrobat DC: 2019.012.20056 or later; Acrobat 2017: 2017.011.30156 or later; Acrobat 2015: 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. Navigate to Help > Check for Updates. 3. Follow prompts to download and install latest version. 4. Restart computer after installation completes.
🔧 Temporary Workarounds
Disable JavaScript in Adobe Reader
allPrevents exploitation vectors that rely on JavaScript execution in PDF files
Edit > Preferences > JavaScript > Uncheck 'Enable Acrobat JavaScript'
Use Protected View
allOpens PDF files in sandboxed environment to limit potential damage
File > Preferences > Security (Enhanced) > Enable Protected View for all files
🧯 If You Can't Patch
- Block PDF files at network perimeter and email gateways
- Implement application whitelisting to prevent unauthorized executables
🔍 How to Verify
Check if Vulnerable:
Check Adobe Acrobat/Reader version against affected ranges in vendor advisoryCheck Version:
Windows: wmic product where "name like 'Adobe Acrobat%'" get version; macOS: /usr/bin/mdls -name kMDItemVersion /Applications/Adobe\ Acrobat\ Reader\ DC.appVerify Fix Applied:
Verify version is updated to patched versions listed in vendor advisory📡 Detection & Monitoring
Log Indicators:
- Process creation from Adobe Reader/Acrobat with unusual command lines
- Crash logs from Adobe processes
- Unusual network connections originating from Adobe processes
Network Indicators:
- Outbound connections from Adobe processes to suspicious IPs
- DNS requests for known malicious domains from systems running Adobe
SIEM Query:
source="*" (process_name="AcroRd32.exe" OR process_name="Acrobat.exe") AND (event_type="process_creation" AND command_line="*powershell*" OR command_line="*cmd*" OR command_line="*rundll32*")