CVE-2024-41831
📋 TL;DR
CVE-2024-41831 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 20.005.30636, 24.002.20965, 24.002.20964, 24.001.30123 and earlier. Successful exploitation requires user interaction through opening a malicious file.
💻 Affected Systems
- Adobe Acrobat Reader
- Adobe Acrobat Reader DC
📦 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
Local code execution allowing malware installation, credential theft, or data exfiltration from the affected system.
If Mitigated
Limited impact through application sandboxing or restricted user privileges, potentially containing the exploit to the application context.
🎯 Exploit Status
Exploitation requires user interaction (opening malicious file). No public exploit code available at disclosure time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Update to Acrobat Reader 20.005.30637 or later, or 24.002.20966 or later
Vendor Advisory: https://helpx.adobe.com/security/products/acrobat/apsb24-57.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-based exploitation vectors that might be used in conjunction with this vulnerability
Edit > Preferences > JavaScript > Uncheck 'Enable Acrobat JavaScript'
Use Protected View
allOpen PDFs in Protected View mode to limit potential damage from malicious files
File > Open > Check 'Open in Protected View' or use default Protected View settings
🧯 If You Can't Patch
- Restrict PDF file opening to trusted sources only through application control policies
- Implement network segmentation to limit lateral movement if exploitation occurs
🔍 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 20.005.30637 or later for version 20.x, or 24.002.20966 or later for version 24.x📡 Detection & Monitoring
Log Indicators:
- Application crashes of acrobat.exe or AcroRd32.exe
- Unusual process creation from Adobe Reader processes
- Suspicious file access patterns from Adobe Reader
Network Indicators:
- Outbound connections from Adobe Reader to unexpected destinations
- DNS requests for suspicious domains following PDF file opening
SIEM Query:
Process Creation where (Image contains "acrobat.exe" OR Image contains "AcroRd32.exe") AND (CommandLine contains ".pdf" OR ParentCommandLine contains ".pdf")