CVE-2023-42873
📋 TL;DR
This is a kernel privilege escalation vulnerability in Apple operating systems where an application can bypass bounds checks to execute arbitrary code with kernel privileges. It affects macOS, iOS, iPadOS, and tvOS. Attackers could gain complete control over affected devices.
💻 Affected Systems
- macOS
- iOS
- iPadOS
- tvOS
📦 What is this software?
Ipad Os by Apple
Ipad Os 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 →Tvos by Apple
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with kernel-level access, allowing installation of persistent malware, data theft, and disabling of security controls.
Likely Case
Local privilege escalation leading to unauthorized access to sensitive data and system resources.
If Mitigated
Limited impact if systems are fully patched and have proper application sandboxing and security controls.
🎯 Exploit Status
Exploitation requires local access or tricking user into installing malicious application. No public exploit code has been disclosed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: macOS Sonoma 14.1, tvOS 17.1, macOS Monterey 12.7.1, iOS 16.7.2 and iPadOS 16.7.2, iOS 17.1 and iPadOS 17.1, macOS Ventura 13.6.1
Vendor Advisory: https://support.apple.com/en-us/HT213981
Restart Required: Yes
Instructions:
1. Open System Settings > General > Software Update. 2. Install available updates. 3. Restart device when prompted.
🔧 Temporary Workarounds
Application Restriction
macOSRestrict installation of untrusted applications to reduce attack surface.
sudo spctl --master-enable
sudo spctl --enable --label "Developer ID"
🧯 If You Can't Patch
- Implement strict application control policies to prevent installation of untrusted software.
- Isolate vulnerable systems from critical network segments and monitor for suspicious activity.
🔍 How to Verify
Check if Vulnerable:
Check current OS version against patched versions listed in Apple advisories.Check Version:
macOS: sw_vers -productVersion, iOS/iPadOS: Settings > General > About > Version, tvOS: Settings > General > About > VersionVerify Fix Applied:
Verify OS version matches or exceeds patched versions: macOS Sonoma 14.1+, tvOS 17.1+, macOS Monterey 12.7.1+, iOS 16.7.2+, iPadOS 16.7.2+, iOS 17.1+, iPadOS 17.1+, macOS Ventura 13.6.1+.📡 Detection & Monitoring
Log Indicators:
- Kernel panic logs
- Unexpected privilege escalation events
- Suspicious application installation
Network Indicators:
- Unusual outbound connections from Apple devices
- C2 communication patterns
SIEM Query:
source="apple_system_logs" AND (event="kernel_panic" OR event="privilege_escalation")🔗 References
- https://support.apple.com/en-us/HT213981
- https://support.apple.com/en-us/HT213982
- https://support.apple.com/en-us/HT213983
- https://support.apple.com/en-us/HT213984
- https://support.apple.com/en-us/HT213985
- https://support.apple.com/en-us/HT213987
- https://support.apple.com/en-us/HT213981
- https://support.apple.com/en-us/HT213982
- https://support.apple.com/en-us/HT213983
- https://support.apple.com/en-us/HT213984
- https://support.apple.com/en-us/HT213985
- https://support.apple.com/en-us/HT213987
- https://support.apple.com/kb/HT213982
- https://support.apple.com/kb/HT213983
- https://support.apple.com/kb/HT213984
- https://support.apple.com/kb/HT213987
