CVE-2024-44135 is a permissions vulnerability in Apple macOS that allows an application running within an App Sandbox container to access protected files that should be restricted. The App Sandbox is a security mechanism designed to isolate apps and limit their access to system resources and user data. This vulnerability arises from insufficient enforcement of sandbox restrictions, specifically a permissions issue categorized under CWE-276 (Incorrect Default Permissions). The flaw enables an app with low privileges to bypass intended access controls and read sensitive files within its own sandbox container, potentially exposing confidential information. The issue affects macOS versions before Sequoia 15 and Sonoma 14.7, where Apple has implemented additional restrictions to address the problem. The CVSS 3.1 base score is 5.5 (medium severity), with an attack vector of local access (AV:L), low attack complexity (AC:L), requiring low privileges (PR:L), no user interaction (UI:N), unchanged scope (S:U), and high impact on confidentiality (C:H) but no impact on integrity or availability (I:N, A:N). No known exploits have been reported in the wild, indicating limited or no active exploitation at this time. However, the vulnerability poses a risk to confidentiality for users and organizations relying on macOS sandboxing to protect sensitive data. The fix involves applying the security updates in macOS Sequoia 15 and Sonoma 14.7, which strengthen sandbox restrictions and correct the permissions issue.

The primary impact of CVE-2024-44135 is the unauthorized disclosure of sensitive information within the App Sandbox container on affected macOS systems. Since the vulnerability allows an app with low privileges to access protected files, confidential data stored within sandboxed environments may be exposed. This can lead to privacy violations, leakage of intellectual property, or exposure of user credentials and other sensitive information. The vulnerability does not affect data integrity or system availability, limiting its impact to confidentiality breaches. Organizations that rely on macOS for sensitive operations, including software development, finance, healthcare, and government sectors, may face increased risk of data leakage if unpatched. The requirement for local access and low privileges means that attackers must already have some foothold on the system, but once present, they can escalate their data access capabilities. Although no exploits are known in the wild, the medium severity rating and potential for data exposure necessitate timely remediation to prevent future exploitation. The vulnerability could also undermine trust in sandboxing as a security boundary on macOS systems.

1. Immediately update all affected macOS systems to macOS Sequoia 15 or macOS Sonoma 14.7 or later, where the vulnerability is fixed. 2. Review and restrict app permissions and sandbox entitlements to the minimum necessary, reducing the attack surface for malicious or compromised apps. 3. Implement strict application whitelisting and monitoring to detect unauthorized or suspicious app behavior that attempts to access protected files. 4. Employ endpoint detection and response (EDR) solutions capable of monitoring file access patterns within sandbox containers to identify potential exploitation attempts. 5. Conduct regular audits of sandbox configurations and file permissions to ensure no inadvertent over-permissioning exists. 6. Educate users about the risks of installing untrusted applications, as local access is required for exploitation. 7. For organizations with sensitive data, consider additional data encryption within sandbox containers to limit exposure even if file access controls are bypassed. 8. Maintain up-to-date backups and incident response plans to quickly respond if exploitation is suspected.