CVE-2024-34100
📋 TL;DR
CVE-2024-34100 is a use-after-free vulnerability in Adobe Acrobat Reader that could allow attackers to execute arbitrary code when a user opens a malicious PDF file. This affects users of Acrobat Reader versions 20.005.30574, 24.002.20736 and earlier. Successful exploitation requires user interaction but could lead to complete system compromise.
💻 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, data theft, ransomware deployment, and lateral movement within the network.
Likely Case
Malware installation leading to data exfiltration, credential theft, or system disruption for individual users who open malicious PDFs.
If Mitigated
Limited impact with proper application sandboxing, exploit mitigations, and user awareness preventing successful exploitation.
🎯 Exploit Status
Exploitation requires user interaction (opening malicious file). No public exploit code available at time of advisory.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 20.005.30575, 24.002.20737
Vendor Advisory: https://helpx.adobe.com/security/products/acrobat/apsb24-29.html
Restart Required: Yes
Instructions:
1. Open Adobe Acrobat Reader. 2. Go to Help > Check for Updates. 3. Follow prompts to install available updates. 4. Restart the application when prompted.
🔧 Temporary Workarounds
Disable JavaScript in Adobe Reader
allPrevents JavaScript execution which may be used in exploitation chains
Edit > Preferences > JavaScript > Uncheck 'Enable Acrobat JavaScript'
Use Protected View
allOpen PDFs in Protected View mode to limit potential damage
File > Open > Select 'Protected View' option when opening files
🧯 If You Can't Patch
- Block PDF files from untrusted sources at email gateways and web proxies
- Implement application whitelisting to prevent unauthorized code execution
🔍 How to Verify
Check if Vulnerable:
Check Adobe Acrobat Reader version in 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 later for continuous track, or 24.002.20737 or later for classic track📡 Detection & Monitoring
Log Indicators:
- Process creation from Acrobat.exe with unusual command lines
- Crash reports from Acrobat Reader
Network Indicators:
- Outbound connections from Acrobat.exe to suspicious domains
- DNS requests for known exploit infrastructure
SIEM Query:
process_name:"AcroRd32.exe" OR process_name:"Acrobat.exe" AND (parent_process:explorer.exe OR cmdline:*powershell* OR cmdline:*cmd*)