CVE-2022-26753
📋 TL;DR
This is a buffer overflow vulnerability in macOS that allows an application to execute arbitrary code with kernel privileges. It affects macOS Monterey systems before version 12.4. Attackers could gain complete control over affected systems.
💻 Affected Systems
- macOS Monterey
📦 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
Complete system compromise with kernel-level privileges, allowing attackers to install persistent malware, steal all data, and use the system as a foothold for lateral movement.
Likely Case
Local privilege escalation where a malicious application gains kernel privileges to bypass security controls and access sensitive system resources.
If Mitigated
Limited impact if systems are fully patched and have additional security controls like application whitelisting and least privilege principles.
🎯 Exploit Status
Requires local access or ability to run malicious code on the target system. No public exploit code has been disclosed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: macOS Monterey 12.4
Vendor Advisory: https://support.apple.com/en-us/HT213257
Restart Required: Yes
Instructions:
1. Open System Preferences > Software Update. 2. Click 'Update Now' if macOS Monterey 12.4 is available. 3. Follow on-screen instructions and restart when prompted.
🔧 Temporary Workarounds
Application Control
allImplement application whitelisting to prevent unauthorized applications from executing.
Privilege Reduction
allRun applications with standard user privileges instead of administrator privileges.
🧯 If You Can't Patch
- Isolate affected systems from critical networks and sensitive data
- Implement strict application control policies and monitor for suspicious activity
🔍 How to Verify
Check if Vulnerable:
Check macOS version in System Preferences > About This Mac. If version is earlier than 12.4, system is vulnerable.Check Version:
sw_versVerify Fix Applied:
Verify macOS version is 12.4 or later in System Preferences > About This Mac.📡 Detection & Monitoring
Log Indicators:
- Unexpected kernel extensions loading
- Processes running with root privileges from unusual locations
- System integrity protection (SIP) violations
Network Indicators:
- Unusual outbound connections from system processes
- Network traffic to known malicious IPs from kernel-level processes
SIEM Query:
source="macos" AND (event_type="process_start" AND user="root" AND process_path NOT IN approved_apps) OR (event_type="kernel_extension_load" AND extension NOT IN approved_extensions)