CVE-2024-34098
📋 TL;DR
This CVE describes an Improper Input Validation vulnerability in Adobe Acrobat Reader that could allow arbitrary code execution when a user opens a malicious PDF file. The vulnerability affects multiple versions of Acrobat Reader across different release tracks. Successful exploitation requires user interaction through opening a malicious document.
💻 Affected Systems
- Adobe Acrobat Reader DC
- Adobe Acrobat Reader
📦 What is this software?
Acrobat by Adobe
Acrobat by Adobe
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining full control of the victim's computer in the context of the current user, potentially leading to data theft, ransomware deployment, or lateral movement within the network.
Likely Case
Malicious actors sending phishing emails with weaponized PDF attachments that execute malware when opened, leading to credential theft, data exfiltration, or installation of persistent backdoors.
If Mitigated
With proper security controls like application whitelisting, least privilege accounts, and email filtering, the impact is limited to isolated incidents that can be contained through endpoint detection and response.
🎯 Exploit Status
Exploitation requires user interaction (opening a malicious file). No public proof-of-concept has been released as of the advisory date.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 20.005.30575 (Continuous Track), 24.002.20737 (Classic Track)
Vendor Advisory: https://helpx.adobe.com/security/products/acrobat/apsb24-29.html
Restart Required: Yes
Instructions:
1. Open Adobe Acrobat Reader. 2. Navigate to Help > Check for Updates. 3. Follow prompts to install available updates. 4. Restart the application when prompted. Alternatively, download the latest version from Adobe's website.
🔧 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
allConfigure Adobe Reader to open files from untrusted sources in Protected View
Edit > Preferences > Security (Enhanced) > Enable Protected View for files from potentially unsafe locations
🧯 If You Can't Patch
- Implement application control/whitelisting to block unauthorized PDF readers
- Use email filtering to block PDF attachments from untrusted sources
🔍 How to Verify
Check if Vulnerable:
Check Adobe Acrobat Reader version via Help > About Adobe Acrobat Reader DCCheck Version:
On Windows: wmic product where name="Adobe Acrobat Reader DC" get versionVerify Fix Applied:
Verify version is 20.005.30575 or higher (Continuous Track) or 24.002.20737 or higher (Classic Track)📡 Detection & Monitoring
Log Indicators:
- Adobe Reader crash logs with suspicious memory addresses
- Windows Event Logs showing unexpected process creation from AcroRd32.exe
Network Indicators:
- Outbound connections from Adobe Reader process to suspicious IPs
- DNS requests for known malicious domains following PDF file opening
SIEM Query:
source="*acrobat*" OR process="AcroRd32.exe" AND (event_type="crash" OR parent_process!="explorer.exe")