CVE-2018-4340

Vulnerability

A memory corruption vulnerability exists in Apple iOS, macOS, tvOS, and watchOS. The issue is present in versions prior to iOS 12, macOS Mojave 10.14, tvOS 12, and watchOS 5. The exact component is not disclosed, but the vulnerability is a memory corruption issue that was addressed with improved memory handling [1][3][4].

Exploitation

Exploitation requires a local application to be installed on the device. The attacker would need to run a malicious app that triggers the memory corruption. No user interaction beyond installing the app is required. The specific steps are not publicly detailed.

Impact

Successful exploitation could allow a local app to cause unexpected system termination or potentially execute arbitrary code with system privileges. This could lead to full compromise of the device's security.

Mitigation

Apple released fixes in iOS 12 (September 17, 2018) [1], macOS Mojave 10.14 (September 24, 2018) [3], tvOS 12 (September 17, 2018) [4], and watchOS 5 (September 17, 2018). Users should update to the latest available versions. No workarounds are documented.