Certain NFS servers allow users to use mknod to gain privileges by creating a writable kmem device and setting the UID to 0.
[
{
"cpes": [
"cpe:2.3:a:sun:nfs:*:*:*:*:*:*:*:*"
],
"vendor": "sun",
"product": "nfs",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "4.1.3",
"versionType": "custom"
}
],
"defaultStatus": "unknown"
}
]