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CVE-2025-31237: macOS System Termination Vulnerability via Maliciously Crafted AFP Network Share

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Overview

CVE-2025-31237 is a significant vulnerability that affects macOS users. The flaw lies in the handling of AFP network shares, which, when maliciously crafted, can lead to an unexpected system termination. This vulnerability could potentially result in system compromise or data leakage, making it a critical issue for any organization or individual using the affected versions of macOS.

Vulnerability Summary

CVE ID: CVE-2025-31237
Severity: High (CVSS: 7.5)
Attack Vector: Network
Privileges Required: None
User Interaction: Required
Impact: System termination, potential system compromise, and data leakage

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Product | Affected Versions

macOS Ventura | 13.7.5 and below
macOS Sequoia | 15.4 and below
macOS Sonoma | 14.7.5 and below

How the Exploit Works

The vulnerability lies in the mounting process of AFP network shares. When a maliciously crafted AFP network share is mounted, it can cause the system to terminate unexpectedly. This could potentially be used as a foothold for further attacks, leading to system compromise or data leakage.

Conceptual Example Code

While the exact code to exploit this vulnerability is not disclosed to prevent misuse, a conceptual example might involve a malicious actor creating a specially crafted AFP share, which when accessed, causes the system to crash. The access might be achieved through a command like:

mount_afp afp://[malicious_IP]/[malicious_share] /Volumes/[mount_point]

The `[malicious_share]` would be configured in such a way that it exploits the vulnerability when mounted.

Mitigation Guidance

Users of affected macOS versions are advised to update to macOS Ventura 13.7.6, macOS Sequoia 15.5, or macOS Sonoma 14.7.6 where the issue has been resolved. Until the update can be applied, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as temporary mitigation.

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Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.

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