CVE-2019-8048
📋 TL;DR
This CVE describes a buffer error 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. Successful exploitation requires a user to open a specially crafted PDF file.
💻 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 on user workstations, enabling credential theft, data exfiltration, or malware installation.
If Mitigated
With proper patching and security controls, impact is limited to isolated incidents that can be contained through endpoint detection and network segmentation.
🎯 Exploit Status
Exploitation requires user interaction (opening a malicious PDF). No public proof-of-concept has been identified, but the high CVSS score suggests reliable exploitation is possible.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2019.012.20036, 2017.011.30144, 2015.006.30499 and later versions
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 install available updates. 4. Restart the application when prompted. 5. Verify update by checking Help > About Adobe Acrobat/Reader.
🔧 Temporary Workarounds
Disable JavaScript in Adobe Reader
allPrevents JavaScript-based exploitation vectors that might be used in conjunction with this vulnerability
Edit > Preferences > JavaScript > Uncheck 'Enable Acrobat JavaScript'
Use Protected View
allForces PDFs to open in protected mode, limiting potential damage from malicious files
Edit > Preferences > Security (Enhanced) > Enable Protected View at startup
🧯 If You Can't Patch
- Implement application whitelisting to prevent unauthorized executables from running
- 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 against affected versions listed in the advisoryCheck Version:
On Windows: wmic product where name like "Adobe Acrobat%" get versionVerify Fix Applied:
Verify version is 2019.012.20036 or later, 2017.011.30144 or later, or 2015.006.30499 or later📡 Detection & Monitoring
Log Indicators:
- Unexpected process creation from Acrobat/Reader processes
- Memory access violations in application logs
- Multiple failed PDF parsing attempts
Network Indicators:
- Outbound connections from Acrobat/Reader processes to suspicious IPs
- DNS requests for known malicious domains following PDF opening
SIEM Query:
source="*acrobat*" OR source="*reader*" AND (event_id=1000 OR event_id=1001) AND message="*access violation*" OR message="*buffer*"