CVE-2024-44283 is a vulnerability identified in Apple macOS operating systems involving an out-of-bounds read error during the parsing of specially crafted files. This vulnerability arises from inadequate bounds checking in the file parsing logic, which can cause the application processing the file to read memory outside the intended buffer boundaries. Such an out-of-bounds read can lead to unexpected application termination, effectively causing a denial-of-service (DoS) condition. The issue is categorized under CWE-125, which relates to improper bounds checking. The vulnerability affects macOS versions prior to Sequoia 15.1, Sonoma 14.7.1, and Ventura 13.7.1, where Apple has implemented fixes to improve bounds checking and prevent this condition. The CVSS v3.1 score is 6.5 (medium severity), with an attack vector of network (AV:N), low attack complexity (AC:L), no privileges required (PR:N), user interaction required (UI:R), unchanged scope (S:U), no impact on confidentiality or integrity (C:N/I:N), but high impact on availability (A:H). Exploitation requires a user to open or otherwise process a maliciously crafted file, which triggers the out-of-bounds read and causes the application to crash. There are no known active exploits in the wild at the time of publication. This vulnerability primarily results in denial of service rather than data compromise or system takeover. However, it can disrupt workflows and potentially be leveraged as part of a broader attack chain.

The primary impact of CVE-2024-44283 is denial of service through unexpected application termination when processing malicious files. For organizations, this can lead to disruption of critical applications, loss of productivity, and potential cascading failures if dependent processes are affected. While it does not compromise data confidentiality or integrity, repeated crashes could be exploited to degrade system availability or cause instability in environments where macOS applications handle untrusted files, such as email clients, document viewers, or file-sharing services. In sensitive or high-availability environments, such as financial institutions, healthcare providers, or government agencies relying on macOS endpoints, this could result in operational interruptions. Additionally, attackers might use this vulnerability as a vector to distract or delay incident response during multi-stage attacks. The lack of required privileges lowers the barrier to exploitation, increasing risk in environments where users might open untrusted files. However, the need for user interaction limits remote automated exploitation.

Organizations should prioritize patching affected macOS systems by upgrading to macOS Sequoia 15.1, Sonoma 14.7.1, Ventura 13.7.1, or later versions where the vulnerability is fixed. Beyond patching, implement strict controls on file handling by restricting or sandboxing applications that process untrusted files, especially email clients and document viewers. Employ endpoint protection solutions capable of detecting anomalous application crashes or suspicious file parsing behavior. Educate users to avoid opening files from untrusted or unknown sources and to report unexpected application crashes promptly. Network-level defenses such as email filtering and attachment scanning can reduce the likelihood of malicious files reaching end users. For critical systems, consider application whitelisting and the use of macOS’s built-in security features like Gatekeeper and System Integrity Protection to limit exposure. Regularly monitor logs for crash events that may indicate exploitation attempts. Finally, maintain an incident response plan that includes procedures for handling denial-of-service conditions caused by application crashes.