CVE-2024-41833
📋 TL;DR
This CVE describes an out-of-bounds read vulnerability in Adobe Acrobat Reader that could allow an attacker to read sensitive memory contents, potentially bypassing security mitigations like ASLR. It affects users of specific older versions of Acrobat Reader who open malicious PDF files. Exploitation requires user interaction via opening a malicious file.
💻 Affected Systems
- Adobe Acrobat Reader
📦 What is this software?
Acrobat by Adobe
Acrobat by Adobe
⚠️ Risk & Real-World Impact
Worst Case
An attacker could read sensitive memory to bypass ASLR, facilitating further exploitation for arbitrary code execution or data exfiltration.
Likely Case
Disclosure of limited memory contents, potentially leading to information leakage or system instability.
If Mitigated
Minimal impact if patches are applied or if users avoid opening untrusted PDF files.
🎯 Exploit Status
Exploitation requires user interaction to open a malicious file; no public proof-of-concept is known at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Update to versions after those listed, as per Adobe advisory APSB24-57
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 the latest version. 4. Restart the application and system if required.
🔧 Temporary Workarounds
Disable PDF opening in Acrobat Reader
allConfigure system to open PDFs with an alternative, non-vulnerable application.
Not applicable; use OS settings to change default PDF handler.
🧯 If You Can't Patch
- Restrict user permissions to limit file execution and enforce least privilege.
- Implement email and web filtering to block malicious PDF attachments and downloads.
🔍 How to Verify
Check if Vulnerable:
Check Acrobat Reader version via Help > About Adobe Acrobat Reader; if version is 20.005.30636, 24.002.20965, 24.002.20964, 24.001.30123 or earlier, it is vulnerable.Check Version:
On Windows: "AcroRd32.exe" /? or check in application; on macOS: open Acrobat Reader and go to About.Verify Fix Applied:
After updating, confirm version is higher than those listed in the affected versions.📡 Detection & Monitoring
Log Indicators:
- Log entries for Acrobat Reader crashes or unexpected file openings, especially from untrusted sources.
Network Indicators:
- Unusual outbound connections after opening PDF files, potentially indicating data exfiltration.
SIEM Query:
Example: event_id=4688 AND process_name="AcroRd32.exe" AND command_line CONTAINS ".pdf" from untrusted IPs