CVE-2023-27946
📋 TL;DR
CVE-2023-27946 is an out-of-bounds read vulnerability in Apple operating systems that could allow arbitrary code execution when processing malicious files. This affects macOS, iOS, and iPadOS users running vulnerable versions. Successful exploitation could lead to complete system compromise.
💻 Affected Systems
- macOS
- iOS
- iPadOS
📦 What is this software?
Ipados by Apple
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 attacker achieves full system compromise with kernel-level privileges, leading to data theft, persistence, and lateral movement.
Likely Case
Application crashes (DoS) or limited code execution in user context when processing malicious files.
If Mitigated
No impact if systems are patched or file processing is restricted to trusted sources.
🎯 Exploit Status
Exploitation requires user interaction to process malicious file. No public exploit code is known at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: macOS Ventura 13.3, iOS 15.7.4, iPadOS 15.7.4, macOS Monterey 12.6.4, macOS Big Sur 11.7.5
Vendor Advisory: https://support.apple.com/en-us/HT213670
Restart Required: Yes
Instructions:
1. Open System Settings > General > Software Update. 2. Install available updates. 3. Restart device when prompted.
🔧 Temporary Workarounds
Restrict file processing
allLimit processing of untrusted files and use application sandboxing where possible.
🧯 If You Can't Patch
- Implement application whitelisting to prevent execution of untrusted applications
- Use network segmentation to isolate vulnerable systems and restrict file transfers
🔍 How to Verify
Check if Vulnerable:
Check system version against affected versions list. On macOS: About This Mac > macOS version. On iOS/iPadOS: Settings > General > About > Version.Check Version:
macOS: sw_vers -productVersion; iOS/iPadOS: Not available via command line (check Settings)Verify Fix Applied:
Verify system version matches or exceeds patched versions listed in fix_official.patch_version.📡 Detection & Monitoring
Log Indicators:
- Application crashes related to file processing
- Kernel panic logs
Network Indicators:
- Unusual file downloads from untrusted sources
- Suspicious email attachments
SIEM Query:
source="apple_system_logs" AND (event="crash" OR event="panic") AND process="*file*processor*"🔗 References
- https://support.apple.com/en-us/HT213670
- https://support.apple.com/en-us/HT213673
- https://support.apple.com/en-us/HT213675
- https://support.apple.com/en-us/HT213677
- https://support.apple.com/en-us/HT213670
- https://support.apple.com/en-us/HT213673
- https://support.apple.com/en-us/HT213675
- https://support.apple.com/en-us/HT213677
