In Puppet Enterprise 2017.1.x and 2017.2.1, using specially formatted strings with certain formatting characters as Classifier node group names or RBAC role display names causes errors, effectively causing a DOS to the service. This was resolved in Puppet Enterprise 2017.2.2.
[
{
"product": "Puppet Enterprise",
"vendor": "Puppet",
"versions": [
{
"status": "affected",
"version": "2017.1.x, 2017.2.1. Fixed in 2017.2.2"
}
]
}
]