CVE-2024-44280 is a vulnerability affecting Intel-based Apple macOS systems that stems from a downgrade issue related to code-signing restrictions. Code-signing is a security mechanism that ensures only trusted and verified applications can modify critical system components. Due to this flaw, an application running on an affected macOS version could bypass these protections and modify protected parts of the file system. This vulnerability does not require any privileges (PR:N) or user interaction (UI:N) to exploit, but it does require local access (AV:L), meaning an attacker must have some level of access to the machine. The vulnerability impacts confidentiality and integrity (C:H/I:H) but does not affect availability (A:N). Apple has fixed this issue in macOS Sequoia 15.1, Sonoma 14.7.1, and Ventura 13.7.1 by implementing additional code-signing restrictions that prevent unauthorized modifications. The vulnerability was published on October 28, 2024, with a CVSS v3.1 score of 7.7, indicating high severity. No known exploits have been reported in the wild yet, but the potential for misuse exists given the ability to alter protected system files. This vulnerability primarily affects Intel-based Macs, which remain widely used in enterprise and personal environments. The flaw could be leveraged by attackers to implant persistent malware, escalate privileges, or compromise system integrity, making it a critical concern for organizations relying on macOS systems.

The potential impact of CVE-2024-44280 is significant for organizations using Intel-based macOS systems. By allowing an application to modify protected parts of the file system without requiring privileges or user interaction, attackers could implant persistent malware, alter system binaries, or bypass security controls. This can lead to unauthorized access to sensitive data, compromise of system integrity, and potential lateral movement within networks. The confidentiality of data stored on affected systems is at high risk, as attackers could manipulate files or install backdoors. Although availability is not directly impacted, the integrity and confidentiality breaches could disrupt business operations, lead to data breaches, and damage organizational reputation. Enterprises with large macOS deployments, especially in sectors like technology, finance, and government, face elevated risks. The requirement for local access limits remote exploitation but does not eliminate insider threats or attacks via compromised user accounts. The absence of known exploits in the wild currently reduces immediate risk, but the high severity score and nature of the vulnerability necessitate prompt remediation to prevent future exploitation.

To mitigate CVE-2024-44280, organizations should immediately apply the security updates provided by Apple in macOS Sequoia 15.1, Sonoma 14.7.1, and Ventura 13.7.1. Beyond patching, organizations should enforce strict application control policies to limit installation and execution of untrusted or unsigned applications, reducing the risk of local exploitation. Employ endpoint detection and response (EDR) solutions capable of monitoring and alerting on unauthorized modifications to protected file system areas. Restrict local user permissions to the minimum necessary to prevent unauthorized app installations or execution. Implement robust physical and logical access controls to limit local access to trusted personnel only. Regularly audit system integrity using file integrity monitoring tools to detect unexpected changes in critical system files. Educate users about the risks of installing unverified software and the importance of reporting suspicious behavior. For environments with sensitive data, consider deploying macOS security features such as System Integrity Protection (SIP) and Apple’s notarization requirements to further harden the system. Finally, maintain an incident response plan tailored to macOS environments to quickly address any exploitation attempts.