Apple · Security Update 2017-001 Sierra · CVE-2018-4390
**Name of the Vulnerable Software and Affected Versions**
macOS High Sierra versions prior to 10.13.1
Security Update 2017-001 Sierra versions prior to the update
Security Update 2017-004 El Capitan versions prior to the update
watchOS versions prior to 4.3
iOS versions prior to 12.1
**Description**
The issue is related to an inconsistent user interface that could be exploited by processing a maliciously crafted text message, potentially leading to UI spoofing.
**Recommendations**
For macOS High Sierra, update to version 10.13.1 or later.
For Security Update 2017-001 Sierra, apply the security update.
For Security Update 2017-004 El Capitan, apply the security update.
For watchOS, update to version 4.3 or later.
For iOS, update to version 12.1 or later.