CVE-2023-42882
📋 TL;DR
This vulnerability in macOS AppleVADriver allows out-of-bounds write when processing images, potentially leading to arbitrary code execution. Attackers could exploit this to run malicious code on affected systems. All macOS users running vulnerable versions are affected.
💻 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 →⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with attacker gaining root privileges and persistent access to the device.
Likely Case
Local privilege escalation or remote code execution when processing malicious images.
If Mitigated
Limited impact with proper network segmentation and least privilege controls in place.
🎯 Exploit Status
Exploit requires user to process a malicious image file. Public proof-of-concept available in disclosure references.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: macOS Sonoma 14.2
Vendor Advisory: https://support.apple.com/en-us/HT214036
Restart Required: Yes
Instructions:
1. Open System Settings 2. Click General 3. Click Software Update 4. Install macOS Sonoma 14.2 or later 5. Restart when prompted
🔧 Temporary Workarounds
Disable automatic image processing
allPrevent automatic processing of image files from untrusted sources
🧯 If You Can't Patch
- Implement application allowlisting to restrict execution of untrusted applications
- Use network segmentation to isolate vulnerable systems and restrict file transfers
🔍 How to Verify
Check if Vulnerable:
Check macOS version in System Settings > General > About. If version is earlier than 14.2, system is vulnerable.Check Version:
sw_versVerify Fix Applied:
Verify macOS version is 14.2 or later in System Settings > General > About.📡 Detection & Monitoring
Log Indicators:
- Kernel panics related to AppleVADriver
- Unexpected process crashes when handling image files
Network Indicators:
- Unusual outbound connections after image file processing
SIEM Query:
process_name:AppleVADriver AND (event_type:crash OR event_type:exception)🔗 References
- http://packetstormsecurity.com/files/176536/macOS-AppleVADriver-Out-Of-Bounds-Write.html
- http://seclists.org/fulldisclosure/2023/Dec/9
- https://support.apple.com/en-us/HT214036
- http://packetstormsecurity.com/files/176536/macOS-AppleVADriver-Out-Of-Bounds-Write.html
- http://seclists.org/fulldisclosure/2023/Dec/9
- https://support.apple.com/en-us/HT214036
- https://support.apple.com/kb/HT214036
