CVE-2018-4324 in Mac OS
Summary
by MITRE
A permissions issue existed in the handling of the Apple ID. This issue was addressed with improved access controls. This issue affected versions prior to macOS Mojave 10.14.
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Analysis
by VulDB Data Team • 08/22/2023
The vulnerability identified as CVE-2018-4324 represents a critical permissions flaw within Apple's macOS ecosystem that specifically targeted the handling of Apple ID authentication and access controls. This issue emerged in macOS versions prior to the release of macOS Mojave 10.14, indicating that the underlying security mechanism failed to properly enforce access restrictions when users interacted with their Apple ID credentials. The flaw essentially allowed unauthorized access to certain system resources or user data that should have been protected by proper authentication and authorization controls.
The technical nature of this vulnerability stems from inadequate access control implementation within the Apple ID handling subsystem. When users authenticated with their Apple ID credentials, the system did not properly validate or enforce the necessary permission levels required to access specific system functions or data repositories. This weakness created a potential pathway for malicious actors or unauthorized processes to bypass normal authentication mechanisms and gain access to restricted resources. The issue falls under the broader category of insufficient access control weaknesses that are commonly classified as CWE-284, which addresses improper access control mechanisms in software systems. The vulnerability exploited the fundamental principle of least privilege by failing to properly restrict access to sensitive Apple ID associated functionalities.
The operational impact of CVE-2018-4324 extended beyond simple unauthorized access, as it could potentially enable attackers to escalate privileges or gain deeper system access through the compromised Apple ID handling mechanism. Users operating on affected macOS versions faced risks including unauthorized data access, potential credential theft, and possible system compromise through exploitation of the permissions flaw. The vulnerability particularly affected users who relied heavily on Apple ID integration for system functions, cloud services, and device management features. Attackers could potentially leverage this weakness to perform actions that should have required explicit user consent or higher privilege levels, thereby undermining the security model that Apple had implemented for user authentication and system protection.
Apple addressed this vulnerability through the implementation of improved access controls in macOS Mojave 10.14 and subsequent releases. The fix involved strengthening the validation mechanisms that govern how Apple ID credentials are processed and how access permissions are enforced within the operating system. This remediation aligns with the ATT&CK framework's concept of privilege escalation techniques, specifically targeting the T1068 - Exploitation for Privilege Escalation tactic. Organizations and users should have upgraded to macOS Mojave 10.14 or later versions to ensure protection against this vulnerability, as the patch implemented more robust authentication checks and enhanced access control enforcement. The resolution demonstrated Apple's commitment to addressing authentication weaknesses and maintaining the security posture of their operating system against known exploits targeting user credential handling mechanisms.