etc/initsystem/prepare-dirs in Icinga 2.x through 2.8.1 has a chown call for a filename in a user-writable directory, which allows local users to gain privileges by leveraging access to the $ICINGA2_USER account for creation of a link.
{
"binaries": [
{
"binary_name": "icinga2",
"binary_version": "2.4.1-2ubuntu1"
},
{
"binary_name": "icinga2-bin",
"binary_version": "2.4.1-2ubuntu1"
},
{
"binary_name": "icinga2-classicui",
"binary_version": "2.4.1-2ubuntu1"
},
{
"binary_name": "icinga2-common",
"binary_version": "2.4.1-2ubuntu1"
},
{
"binary_name": "icinga2-ido-mysql",
"binary_version": "2.4.1-2ubuntu1"
},
{
"binary_name": "icinga2-ido-pgsql",
"binary_version": "2.4.1-2ubuntu1"
},
{
"binary_name": "icinga2-studio",
"binary_version": "2.4.1-2ubuntu1"
},
{
"binary_name": "libicinga2",
"binary_version": "2.4.1-2ubuntu1"
},
{
"binary_name": "vim-icinga2",
"binary_version": "2.4.1-2ubuntu1"
}
]
}
{
"binaries": [
{
"binary_name": "icinga2",
"binary_version": "2.8.1-0ubuntu2"
},
{
"binary_name": "icinga2-bin",
"binary_version": "2.8.1-0ubuntu2"
},
{
"binary_name": "icinga2-classicui",
"binary_version": "2.8.1-0ubuntu2"
},
{
"binary_name": "icinga2-common",
"binary_version": "2.8.1-0ubuntu2"
},
{
"binary_name": "icinga2-ido-mysql",
"binary_version": "2.8.1-0ubuntu2"
},
{
"binary_name": "icinga2-ido-pgsql",
"binary_version": "2.8.1-0ubuntu2"
},
{
"binary_name": "icinga2-studio",
"binary_version": "2.8.1-0ubuntu2"
},
{
"binary_name": "libicinga2",
"binary_version": "2.8.1-0ubuntu2"
},
{
"binary_name": "vim-icinga2",
"binary_version": "2.8.1-0ubuntu2"
}
]
}