CVE-2024-27883 – This CVE describes a macOS permissions vulnerab... (How to Fix)

Q: What is the severity of CVE-2024-27883?

CVE-2024-27883 has a CVSS score of 4.4 (MEDIUM). This CVE describes a macOS permissions vulnerability where applications can bypass file system protections and modify restricted areas. It affects macOS Monterey, Ventura, and Sonoma before specific patch versions. The vulnerability requires local access or malicious app installation.

📋 TL;DR

This CVE describes a macOS permissions vulnerability where applications can bypass file system protections and modify restricted areas. It affects macOS Monterey, Ventura, and Sonoma before specific patch versions. The vulnerability requires local access or malicious app installation.

💻 Affected Systems

Products:

macOS

Versions: macOS Monterey before 12.7.6, macOS Ventura before 13.6.8, macOS Sonoma before 14.6

Operating Systems: macOS

Default Config Vulnerable: ⚠️ Yes

Notes: All default configurations of affected macOS versions are vulnerable. Requires app execution capability.

📦 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 →

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

Malicious app could modify critical system files, install persistent malware, or compromise system integrity leading to complete system takeover.

🟠

Likely Case

Malicious app could elevate privileges, modify user data, or install unwanted software with limited system impact.

🟢

If Mitigated

With proper app vetting and user permissions, impact is minimal as it requires user interaction or malicious app installation.

🌐 Internet-Facing: LOW - Requires local access or malicious app installation, not directly exploitable over network.

🏢 Internal Only: MEDIUM - Internal users could exploit via malicious apps, but requires initial access or user interaction.

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ✅ No

Complexity: MEDIUM

Exploitation requires app execution, likely through social engineering or malicious app installation. No public exploit code identified in references.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: macOS Sonoma 14.6, macOS Monterey 12.7.6, macOS Ventura 13.6.8

Vendor Advisory: https://support.apple.com/en-us/HT214118

Restart Required: Yes

Instructions:

1. Open System Settings > General > Software Update. 2. Install available macOS update. 3. Restart when prompted.

🔧 Temporary Workarounds

Restrict App Installation

macos

Only allow apps from App Store and identified developers in System Settings

System Settings > Privacy & Security > Security: Allow apps downloaded from App Store and identified developers

Gatekeeper Enforcement

macos

Ensure Gatekeeper is enabled to verify app signatures

sudo spctl --master-enable
sudo spctl --status

🧯 If You Can't Patch

Implement application allowlisting to restrict which apps can run
Use endpoint protection software with behavioral analysis to detect suspicious file system modifications

🔍 How to Verify

Check if Vulnerable:

Check macOS version in System Settings > General > About. If version is Monterey <12.7.6, Ventura <13.6.8, or Sonoma <14.6, system is vulnerable.

Check Version:

sw_vers

Verify Fix Applied:

Verify macOS version shows 12.7.6, 13.6.8, or 14.6 or higher after update.

📡 Detection & Monitoring

Log Indicators:

Unusual file modifications in protected directories in system.log
Console.app entries showing app accessing restricted paths

Network Indicators:

Not network exploitable - focus on endpoint detection

SIEM Query:

source="macos_system_logs" AND (event="file_modification" AND path CONTAINS "/System/" OR path CONTAINS "/Library/")

📊 Metadata

CVE ID: CVE-2024-27883

CVSS v3 Score: 4.4 (MEDIUM)

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

CWE: CWE-732

Published: July 29, 2024

Last Updated: November 4, 2025

🔗 References

http://seclists.org/fulldisclosure/2024/Jul/18 Mailing List,Third Party Advisory
http://seclists.org/fulldisclosure/2024/Jul/19 Mailing List,Third Party Advisory
http://seclists.org/fulldisclosure/2024/Jul/20 Mailing List,Third Party Advisory
https://support.apple.com/en-us/HT214118 Release Notes,Vendor Advisory
https://support.apple.com/en-us/HT214119 Release Notes,Vendor Advisory
https://support.apple.com/en-us/HT214120 Release Notes,Vendor Advisory
http://seclists.org/fulldisclosure/2024/Jul/18 Mailing List,Third Party Advisory
http://seclists.org/fulldisclosure/2024/Jul/19 Mailing List,Third Party Advisory
http://seclists.org/fulldisclosure/2024/Jul/20 Mailing List,Third Party Advisory
https://support.apple.com/en-us/HT214118 Release Notes,Vendor Advisory
https://support.apple.com/en-us/HT214119 Release Notes,Vendor Advisory
https://support.apple.com/en-us/HT214120 Release Notes,Vendor Advisory
https://support.apple.com/kb/HT214118
https://support.apple.com/kb/HT214119
https://support.apple.com/kb/HT214120

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