CVE-2018-4336

Vulnerability

A memory corruption issue exists in the CFNetwork component of Apple operating systems [4]. This vulnerability affects versions prior to iOS 12, macOS Mojave 10.14, tvOS 12, and watchOS 5 [1][2][3][4]. The bug allows a local application to leverage improper memory handling to achieve arbitrary code execution with system privileges [4].

Exploitation

To exploit this vulnerability, an attacker must have the ability to run a malicious application on the target device [4]. No additional network access or user interaction beyond installing the app is required by the description. The application triggers the memory corruption via CFNetwork, leading to code execution in the kernel or system context [4][2].

Impact

Successful exploitation allows the malicious application to execute arbitrary code with system-level privileges [4]. This gives the attacker full control over the device, including the ability to install software, access all user data, and modify system settings. The impact includes complete compromise of confidentiality, integrity, and availability.

Mitigation

Apple addressed this issue in iOS 12 (released September 17, 2018), macOS Mojave 10.14 (released September 24, 2018), tvOS 12 (released September 17, 2018), and watchOS 5 (released September 17, 2018) [1][2][3][4]. Users should update their devices to the latest available operating system version to receive the fix. No workarounds are provided by Apple.