CVE-2018-4326

Vulnerability

A memory corruption issue exists in Apple iOS versions prior to iOS 12 and macOS versions prior to Mojave 10.14. The official description indicates that the bug was addressed with improved memory handling [1][3]. The exact component is not disclosed in the available references, but the vulnerability affects a wide range of devices including iPhones (5s and later), iPads (Air and later), iPod touch 6th generation, and multiple Mac models [3].

Exploitation

The exploitation vector is not detailed in the references. One reference mentions a remote attack vector involving AFP servers through HTTP clients [2] but that may be a separate issue; the memory corruption itself could be triggered locally by a malicious app or remotely depending on the specific service. The minimal requirement would be to run an untrusted application on the device or to send crafted data to an affected service.

Impact

Successful exploitation could lead to memory corruption, potentially resulting in arbitrary code execution, information disclosure, or denial of service. The exact impact is not detailed in the references, but memory corruption bugs in Apple’s user space or kernel often allow an attacker to gain elevated privileges or execute arbitrary code.

Mitigation

Apple addressed this issue in iOS 12 released on September 17, 2018 [1], and in macOS Mojave 10.14 released on September 24, 2018 [3]. For macOS High Sierra and Sierra, a security update (2018-002 and 2018-005) was released on October 30, 2018 [2]. Users should update to the latest available versions. No workarounds are mentioned in the references.