In iOS before 11.3, Safari before 11.1, tvOS before 11.3, watchOS before 4.3, iTunes before 12.7.4 for Windows, an array indexing issue existed in the handling of a function in javascript core. This issue was addressed with improved checks.
https://security.gentoo.org/glsa/201812-04
https://support.apple.com/HT208693,
https://support.apple.com/HT208694,
https://support.apple.com/HT208695,
Source: MITRE
Published: 2019-01-11
Updated: 2019-03-08
Type: CWE-129
Base Score: 6.8
Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P
Impact Score: 6.4
Exploitability Score: 8.6
Severity: MEDIUM
Base Score: 8.8
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 2.8
Severity: HIGH