CVE-2019-8015
📋 TL;DR
This CVE describes a heap overflow 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
Full system compromise with attacker gaining complete 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 with minimal data exposure.
🎯 Exploit Status
Heap overflow vulnerabilities in PDF readers are commonly exploited in the wild. The vulnerability requires user interaction but no authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Acrobat DC/Reader DC: 2019.012.20036 and later; Acrobat 2017/Reader 2017: 2017.011.30144 and later; Acrobat 2015/Reader 2015: 2015.006.30499 and later
Vendor Advisory: https://helpx.adobe.com/security/products/acrobat/apsb19-41.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 available updates. 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 at startup
🧯 If You Can't Patch
- Implement application whitelisting to prevent execution of unauthorized applications
- Deploy 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 version rangesCheck Version:
On Windows: wmic product where "name like 'Adobe Acrobat%' or name like 'Adobe Reader%'" get name, versionVerify Fix Applied:
Verify version is updated to patched versions: 2019.012.20036+, 2017.011.30144+, or 2015.006.30499+📡 Detection & Monitoring
Log Indicators:
- Application crashes of Adobe Acrobat/Reader with heap-related error codes
- Unusual process creation from Adobe Acrobat/Reader processes
- Suspicious PowerShell or command line execution following PDF opening
Network Indicators:
- Outbound connections from Adobe processes to suspicious IPs/domains
- DNS queries for known C2 infrastructure following PDF file access
SIEM Query:
source="windows" AND (process_name="AcroRd32.exe" OR process_name="Acrobat.exe") AND (event_id="1000" OR event_id="1001") AND message="heap"