CVE-2019-8215
📋 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 on any operating system are at risk. Successful exploitation typically requires a user to open a malicious 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
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
Arbitrary code execution in the context of the current user, allowing attackers to install malware, steal credentials, or access sensitive documents.
If Mitigated
Limited impact with proper application sandboxing and security controls, potentially containing the exploit to the PDF reader process.
🎯 Exploit Status
Exploitation requires user interaction (opening a malicious PDF). The vulnerability is in the wild and has been actively exploited according to Adobe's advisory.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Acrobat DC/Reader DC: 2019.012.20048 or later; Acrobat 2017/Reader 2017: 2017.011.30156 or later; Acrobat 2015/Reader 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. Go to Help > Check for Updates. 3. Follow the prompts to download and install the latest update. 4. Restart the application when prompted.
🔧 Temporary Workarounds
Disable JavaScript in Adobe Reader
allPrevents JavaScript-based exploitation vectors from executing in PDF files
In Adobe Reader: Edit > Preferences > JavaScript > Uncheck 'Enable Acrobat JavaScript'
Use Protected View
allOpen untrusted PDFs in Protected View to limit potential damage
In Adobe Reader: File > Properties > Security > Enable Protected View for untrusted documents
🧯 If You Can't Patch
- Restrict PDF file handling to alternative PDF readers that are not vulnerable
- Implement application whitelisting to prevent execution of unauthorized code
🔍 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 versionVerify Fix Applied:
Verify version is updated to patched versions: 2019.012.20048+, 2017.011.30156+, or 2015.006.30511+📡 Detection & Monitoring
Log Indicators:
- Adobe Acrobat/Reader crash logs with memory access violations
- Windows Event Logs showing application crashes (Event ID 1000)
Network Indicators:
- Unexpected outbound connections from Adobe processes
- DNS requests to suspicious domains following PDF opening
SIEM Query:
source="*acrobat*" OR source="*reader*" AND (event_id=1000 OR "access violation" OR "use after free")