CVE-2019-8030
📋 TL;DR
This CVE describes a use-after-free vulnerability in Adobe Acrobat and Reader that could allow attackers to execute arbitrary code on affected systems. Users of vulnerable versions who open malicious PDF files are at risk. 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 of the victim's computer, 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 training, exploitation attempts would be blocked or contained to isolated systems.
🎯 Exploit Status
Use-after-free vulnerabilities in PDF readers are commonly exploited. The high CVSS score and public advisory make weaponization likely.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Acrobat DC/Reader DC: 2019.012.20036; Acrobat 2017/Reader 2017: 2017.011.30144; Acrobat 2015/Reader 2015: 2015.006.30499
Vendor Advisory: https://helpx.adobe.com/security/products/acrobat/apsb19-41.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. 5. Verify update by checking Help > About Adobe Acrobat/Reader.
🔧 Temporary Workarounds
Disable JavaScript in Adobe Reader
allPrevents JavaScript-based exploitation vectors that might leverage this vulnerability
Edit > Preferences > JavaScript > Uncheck 'Enable Acrobat JavaScript'
Use Protected View
allOpens PDFs in sandboxed mode to limit potential damage
File > Properties > Security > Enable Protected View for all files
🧯 If You Can't Patch
- Implement application control to block execution of Adobe Reader/Acrobat
- Use alternative PDF viewers that are not affected by this vulnerability
- Block PDF file attachments at email gateways and web proxies
- Implement network segmentation to limit lateral movement if exploitation occurs
🔍 How to Verify
Check if Vulnerable:
Check Adobe Acrobat/Reader version via Help > About Adobe Acrobat/Reader and compare with affected versions listCheck Version:
On Windows: wmic product where name like "Adobe Acrobat%" get version; On macOS: /usr/bin/mdls -name kMDItemVersion /Applications/Adobe\ Acrobat\ Reader\ DC.appVerify Fix Applied:
Verify version is 2019.012.20036 or later for DC, 2017.011.30144 or later for 2017, or 2015.006.30499 or later for 2015📡 Detection & Monitoring
Log Indicators:
- Adobe crash reports with memory access violations
- Windows Event Logs showing unexpected process creation from AcroRd32.exe or Acrobat.exe
- Antivirus alerts for PDF files with embedded scripts or shellcode
Network Indicators:
- Unusual outbound connections from systems running Adobe Reader/Acrobat
- PDF downloads from suspicious domains followed by unexpected network activity
SIEM Query:
source="*windows*" AND (process_name="AcroRd32.exe" OR process_name="Acrobat.exe") AND (event_id="1000" OR event_id="1001") AND message="*Access Violation*"