CVE-2019-8003
📋 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 running vulnerable versions of Adobe Acrobat or Reader are at risk when opening malicious PDF files. 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 through arbitrary code execution with the privileges of the current user, 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 compromise.
If Mitigated
With proper security controls, exploitation attempts are blocked by endpoint protection, network filtering, or user awareness preventing malicious PDF execution.
🎯 Exploit Status
Exploitation requires user interaction to open a malicious PDF file. No authentication is required for exploitation once the file is opened.
🛠️ 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. Go to Help > Check for Updates. 3. Follow prompts to download and install available updates. 4. Restart the application when prompted. 5. Verify the update was successful by checking Help > About Adobe Acrobat/Reader.
🔧 Temporary Workarounds
Disable JavaScript in Adobe Reader
allDisabling JavaScript can prevent exploitation of many PDF-based vulnerabilities
In Adobe Reader: Edit > Preferences > JavaScript > Uncheck 'Enable Acrobat JavaScript'
Use Protected View
allEnable Protected View for files from potentially unsafe locations
In Adobe Reader: Edit > Preferences > Security (Enhanced) > Enable Protected View at startup
🧯 If You Can't Patch
- Restrict PDF file execution through application control policies
- Implement network segmentation to limit lateral movement from compromised systems
🔍 How to Verify
Check if Vulnerable:
Check Adobe Acrobat/Reader version against affected version ranges listed in the advisoryCheck Version:
In Adobe Acrobat/Reader: Help > About Adobe Acrobat/ReaderVerify Fix Applied:
Verify installed version is equal to or higher than the patched versions listed in the advisory📡 Detection & Monitoring
Log Indicators:
- Application crashes in Adobe Acrobat/Reader logs
- Unexpected process creation from Acrobat/Reader processes
- Suspicious file access patterns from PDF reader
Network Indicators:
- Outbound connections from Acrobat/Reader to suspicious IPs
- DNS requests for known malicious domains following PDF file opening
SIEM Query:
source="*acrobat*" OR source="*reader*" AND (event_type="crash" OR process_name="cmd.exe" OR process_name="powershell.exe")