CVE-2024-20730
📋 TL;DR
This CVE describes an integer overflow 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 and could lead to complete system compromise in the context of the current user.
💻 Affected Systems
- Adobe Acrobat Reader DC
- Adobe Acrobat Reader
📦 What is this software?
Acrobat by Adobe
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining the same privileges as the logged-in user, potentially leading to data theft, ransomware deployment, or lateral movement within the network.
Likely Case
Malicious actor gains control of the affected system, installs malware, steals credentials, or exfiltrates sensitive data.
If Mitigated
Limited impact due to proper patching, application whitelisting, and user awareness training preventing malicious file execution.
🎯 Exploit Status
Exploitation requires user interaction (opening malicious file). No public exploit code available at time of analysis.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Update to version 20.005.30554 or 23.008.20476
Vendor Advisory: https://helpx.adobe.com/security/products/acrobat/apsb24-07.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 to limit potential damage
File > Open > Select 'Protected View' option when opening files
🧯 If You Can't Patch
- Implement application whitelisting to block unauthorized PDF readers
- Use network segmentation to limit lateral movement from compromised systems
🔍 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 20.005.30554 or higher for Continuous track, or 23.008.20476 or higher for Classic track📡 Detection & Monitoring
Log Indicators:
- Unusual process creation from AcroRd32.exe or Acrobat.exe
- Multiple failed PDF file openings
- Suspicious network connections from PDF reader process
Network Indicators:
- Outbound connections to suspicious IPs after PDF opening
- DNS requests for known malicious domains from PDF reader
SIEM Query:
Process Creation where Image contains "AcroRd32" or Image contains "Acrobat" and CommandLine contains ".pdf"