This issue was addressed with improved checks. This issue is fixed in iOS 12.2, macOS Mojave 10.14.4, tvOS 12.2. A malicious application may be able to overwrite arbitrary files.
[
{
"product": "iOS",
"vendor": "Apple",
"versions": [
{
"lessThan": "iOS 12.2",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
},
{
"product": "macOS",
"vendor": "Apple",
"versions": [
{
"lessThan": "macOS Mojave 10.14.4",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
},
{
"product": "tvOS",
"vendor": "Apple",
"versions": [
{
"lessThan": "tvOS 12.2",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
}
]