CVE-2024-27872
📋 TL;DR
This vulnerability allows a malicious app to bypass macOS symlink validation and access protected user data. It affects macOS systems before Sonoma 14.6. The issue involves improper handling of symbolic links that could lead to unauthorized data access.
💻 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
An attacker could gain access to sensitive user data like passwords, encryption keys, or personal files through a malicious application.
Likely Case
Malicious apps in the App Store or downloaded from untrusted sources could access user data they shouldn't have permission to read.
If Mitigated
With proper app sandboxing and user permission controls, impact is limited to data accessible by the app's granted permissions.
🎯 Exploit Status
Requires user to run a malicious application. No public exploit code identified in references.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: macOS Sonoma 14.6
Vendor Advisory: https://support.apple.com/en-us/HT214119
Restart Required: Yes
Instructions:
1. Open System Settings 2. Click General 3. Click Software Update 4. Install macOS Sonoma 14.6 or later 5. Restart when prompted
🔧 Temporary Workarounds
Restrict App Installation Sources
macOSOnly allow app installations from the App Store and identified developers
Enable Gatekeeper
macOSEnsure Gatekeeper is enabled to block apps from unidentified developers
sudo spctl --master-enable
🧯 If You Can't Patch
- Implement application allowlisting to control which apps can run
- Educate users about risks of installing apps from untrusted sources
🔍 How to Verify
Check if Vulnerable:
Check macOS version in System Settings > General > About. If version is earlier than 14.6, system is vulnerable.Check Version:
sw_versVerify Fix Applied:
Verify macOS version is 14.6 or later in System Settings > General > About.📡 Detection & Monitoring
Log Indicators:
- Unusual file access patterns by applications
- Console logs showing symlink-related errors
Network Indicators:
- Not applicable - local vulnerability
SIEM Query:
source="macos" AND (event="file_access" OR event="symlink") AND user_data NOT NULL