CVE-2024-40809 is a logic vulnerability in Apple’s iOS, iPadOS, and related operating systems that allows a shortcut to bypass the system’s Internet permission requirements. Normally, shortcuts that require Internet access must obtain explicit user permission to prevent unauthorized network communication. However, due to a flaw in the permission checking logic, a crafted shortcut can circumvent these controls and access the Internet without user consent. This bypass can lead to unauthorized data transmission, exposure of sensitive information, or communication with malicious servers. The vulnerability affects a broad range of Apple platforms, including iOS versions prior to 16.7.9 and 17.6, iPadOS, macOS Monterey 12.7.6 and later, macOS Ventura, macOS Sonoma, visionOS, and watchOS. The flaw requires local privilege (AV:L - adjacent network or local access) and low complexity to exploit, with no user interaction needed once the shortcut is installed or executed. The vulnerability was addressed by Apple through improved permission checks in the specified OS updates. While no active exploitation has been reported, the potential for misuse is significant given the widespread use of shortcuts and the sensitive nature of Internet access permissions on Apple devices.

The vulnerability allows malicious shortcuts to bypass Internet permission prompts, enabling unauthorized network communication. This can lead to several impacts: confidentiality breaches through data exfiltration, integrity compromise if malicious commands or data are sent or received, and availability impacts if the device is used as part of a botnet or for denial-of-service attacks. Organizations relying on Apple devices for sensitive communications or data processing are at risk of covert data leakage or command and control communications without user awareness. The ease of exploitation and lack of required user interaction increase the likelihood of successful attacks, especially in environments where users install shortcuts from untrusted sources. This can undermine trust in device security and complicate incident response efforts.

Organizations and users should immediately apply the security updates released by Apple: iOS 16.7.9, iOS 17.6, iPadOS 16.7.9, iPadOS 17.6, macOS Monterey 12.7.6, macOS Ventura 13.6.8, macOS Sonoma 14.6, visionOS 1.3, and watchOS 10.6. Beyond patching, administrators should restrict the installation of shortcuts from untrusted or unknown sources by enforcing device management policies. Monitoring network traffic for unusual or unauthorized connections originating from Apple devices can help detect exploitation attempts. Educating users about the risks of installing shortcuts and encouraging the use of only vetted shortcuts from trusted repositories reduces exposure. Additionally, reviewing and auditing existing shortcuts for unnecessary Internet permissions can limit the attack surface. Implementing network segmentation and least privilege principles for Apple devices further mitigates potential impacts.