This issue is fixed in macOS Mojave 10.14. A permissions issue existed in DiskArbitration. This was addressed with additional ownership checks.
[
{
"product": "macOS",
"vendor": "Apple",
"versions": [
{
"lessThan": "10.14",
"status": "affected",
"version": "unspecified",
"versionType": "custom"
}
]
}
]