CVE-2023-40396

Vulnerability

A memory handling vulnerability exists in Apple's kernel, affecting iOS versions prior to 17, iPadOS versions prior to 17, macOS prior to Sonoma 14, watchOS prior to 10, and tvOS prior to 17. The issue was addressed with improved memory handling [1][2][3][4]. The exact code path and required configuration are not publicly detailed.

Exploitation

An attacker requires the ability to run a malicious app on the target device. No additional privileges or user interaction beyond installing the app are specified. The app can exploit the memory handling flaw to achieve arbitrary code execution with kernel privileges [from CVE description]. Specific exploitation steps are not disclosed.

Impact

Successful exploitation allows the app to execute arbitrary code with kernel privileges, resulting in full compromise of the device's operating system, including access to all data and system functions.

Mitigation

Apple has fixed this issue in iOS 17 and iPadOS 17 (released September 18, 2023), macOS Sonoma 14 (released September 26, 2023), watchOS 10 (released September 18, 2023), and tvOS 17 (released September 18, 2023) [1][2][3][4]. Users should update their devices to the latest available versions. No workarounds are mentioned.