CVE-2024-40809 is a logic vulnerability in Apple’s shortcut functionality across multiple operating systems including iOS, iPadOS, macOS variants, watchOS, and visionOS. The flaw allows a shortcut to bypass the intended Internet permission checks, enabling it to access network resources without explicit user consent. This bypass stems from insufficient validation in the permission enforcement logic, which Apple has rectified by implementing improved checks in the specified patched versions. The vulnerability’s CVSS 3.1 score of 7.8 reflects its high 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), and impacting confidentiality, integrity, and availability (C:H/I:H/A:H). Exploitation could allow an attacker with limited access to execute network communications that should be blocked, potentially leading to data leakage, unauthorized command and control communications, or disruption of device functionality. The vulnerability affects all versions prior to the patches released in late July 2024. Although no active exploitation has been reported, the broad impact on multiple Apple platforms and the critical nature of network permission controls make this a significant risk. Organizations using Apple devices should assess their exposure and apply updates promptly.

For European organizations, the impact of CVE-2024-40809 is substantial due to the widespread use of Apple devices in both consumer and enterprise environments. The ability for a shortcut to bypass Internet permission controls can lead to unauthorized data exfiltration, manipulation of network communications, or disruption of services, compromising confidentiality, integrity, and availability of sensitive information. This is particularly critical for sectors such as finance, healthcare, government, and critical infrastructure where Apple devices are used for secure communications and data handling. The vulnerability could be exploited by insiders or attackers who gain limited local access, increasing the risk of insider threats or lateral movement within networks. The lack of required user interaction lowers the barrier for exploitation once local access is obtained. Failure to patch could result in regulatory non-compliance under GDPR due to potential data breaches. Additionally, the cross-platform nature of the vulnerability affects not only mobile devices but also desktops and wearable devices, broadening the attack surface within organizations.

European organizations should implement a targeted patch management strategy to update all affected Apple devices to the fixed versions: iOS 16.7.9, iPadOS 16.7.9, macOS Ventura 13.6.8, macOS Monterey 12.7.6, iOS 17.6, iPadOS 17.6, watchOS 10.6, visionOS 1.3, and macOS Sonoma 14.6. Beyond patching, organizations should audit and restrict the use of shortcuts, especially those obtained from untrusted sources, by enforcing policies that limit shortcut installation and execution. Endpoint detection and response (EDR) solutions should be tuned to monitor for unusual shortcut activity or network communications initiated by shortcuts. User training should emphasize the risks of installing unverified shortcuts. Network segmentation can limit the impact of compromised devices. Additionally, organizations should review and tighten local privilege assignments to reduce the likelihood of attackers gaining the required local access. Regular vulnerability scanning and compliance checks should verify that all devices remain up to date. Incident response plans should incorporate scenarios involving shortcut-based network bypasses.