CVE-2023-36854
📋 TL;DR
This vulnerability in macOS allows processing malicious files to cause unexpected app termination or arbitrary code execution. It affects macOS Big Sur, Monterey, and Ventura users who open untrusted files. Attackers could exploit this to crash applications or execute malicious code on vulnerable systems.
💻 Affected Systems
- macOS
📦 What is this software?
Macos by Apple
macOS is Apple's desktop and laptop operating system powering Mac computers used by millions of professionals, developers, creative professionals, and enterprise users worldwide. Built on a Unix foundation with the Darwin kernel and modern Cocoa frameworks, macOS delivers a seamless ecosystem integr...
Learn more about Macos →Macos by Apple
macOS is Apple's desktop and laptop operating system powering Mac computers used by millions of professionals, developers, creative professionals, and enterprise users worldwide. Built on a Unix foundation with the Darwin kernel and modern Cocoa frameworks, macOS delivers a seamless ecosystem integr...
Learn more about Macos →Macos by Apple
macOS is Apple's desktop and laptop operating system powering Mac computers used by millions of professionals, developers, creative professionals, and enterprise users worldwide. Built on a Unix foundation with the Darwin kernel and modern Cocoa frameworks, macOS delivers a seamless ecosystem integr...
Learn more about Macos →⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to full system compromise, data theft, or ransomware deployment.
Likely Case
Application crashes or denial of service from malicious files, potentially leading to limited code execution.
If Mitigated
No impact if systems are patched or proper file handling controls prevent malicious file processing.
🎯 Exploit Status
Exploitation requires user interaction to process malicious files. No public exploit code is currently available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: macOS Big Sur 11.7.9, macOS Monterey 12.6.8, macOS Ventura 13.5
Vendor Advisory: https://support.apple.com/en-us/HT213843
Restart Required: Yes
Instructions:
1. Open System Settings > General > Software Update. 2. Install available updates. 3. Restart when prompted.
🔧 Temporary Workarounds
Restrict file processing
allLimit file processing to trusted sources and avoid opening files from unknown origins.
🧯 If You Can't Patch
- Implement application whitelisting to prevent execution of untrusted applications
- Use endpoint protection with file scanning capabilities
🔍 How to Verify
Check if Vulnerable:
Check macOS version via 'sw_vers' command or System Settings > General > AboutCheck Version:
sw_versVerify Fix Applied:
Verify macOS version is 11.7.9, 12.6.8, or 13.5 or higher📡 Detection & Monitoring
Log Indicators:
- Unexpected application crashes, suspicious file processing events
Network Indicators:
- Downloads of suspicious file types followed by application crashes
SIEM Query:
source="macos" AND (event="app_crash" OR event="file_open") AND file_extension IN (suspicious_extensions)