CVE-2024-54477 is a vulnerability in Apple macOS that allows an application to access user-sensitive data due to insufficient access control checks within the operating system. The vulnerability was identified and addressed by Apple through improved validation mechanisms in macOS Sequoia 15.2, Sonoma 14.7.2, and Ventura 13.7.2. The flaw falls under CWE-922 (Improper Restriction of Operations within the Bounds of a Memory Buffer), indicating that the OS failed to properly restrict app operations leading to unauthorized data access. The CVSS 3.1 base score is 5.5, reflecting a medium severity level. The attack vector is local (AV:L), meaning the attacker must have local access to the system. No privileges are required (PR:N), but user interaction is necessary (UI:R), such as running or interacting with a malicious or compromised app. The vulnerability impacts confidentiality (C:H) but does not affect integrity or availability. There are no known exploits in the wild as of the publication date. The vulnerability affects all macOS versions prior to the patched releases, potentially exposing sensitive user data to unauthorized apps. The fix involves enhanced checks that prevent unauthorized access to sensitive data by applications.

The primary impact of CVE-2024-54477 is the unauthorized disclosure of sensitive user data on macOS systems. Since the vulnerability allows apps to bypass certain access controls without requiring privileges, malicious or compromised applications could exploit this flaw to harvest confidential information such as personal files, credentials, or other sensitive content. Although the vulnerability does not affect system integrity or availability, the breach of confidentiality can lead to privacy violations, identity theft, or further targeted attacks. Organizations relying on macOS devices, especially those handling sensitive or regulated data, face increased risk of data leakage. The requirement for user interaction limits large-scale automated exploitation but does not eliminate risk, particularly in environments where users may install untrusted software or open malicious files. The absence of known exploits in the wild suggests limited current exploitation but does not preclude future attacks. Overall, the vulnerability poses a moderate risk to confidentiality and user privacy on affected macOS systems worldwide.

1. Immediately update all macOS devices to the patched versions: macOS Sequoia 15.2, macOS Sonoma 14.7.2, or macOS Ventura 13.7.2 to ensure the vulnerability is remediated. 2. Implement strict application whitelisting and restrict installation of apps from untrusted sources to reduce the risk of malicious app execution. 3. Educate users about the risks of interacting with unknown or suspicious applications, emphasizing caution with app permissions and prompts requiring interaction. 4. Use macOS built-in security features such as System Integrity Protection (SIP) and Gatekeeper to limit app capabilities and enforce code signing. 5. Monitor system logs and user activity for unusual behavior indicative of attempts to exploit this vulnerability. 6. Employ endpoint detection and response (EDR) solutions capable of detecting anomalous access to sensitive data by applications. 7. For organizations, enforce policies that limit local user privileges and restrict software installation rights to minimize exposure. 8. Regularly audit installed applications and remove unnecessary or outdated software that could be exploited.