systemd v233 and earlier fails to safely parse usernames starting with a numeric digit (e.g. "0day"), running the service in question with root privileges rather than the user intended.
{
"binaries": [
{
"binary_name": "libnss-myhostname",
"binary_version": "229-4ubuntu21.31+esm4"
},
{
"binary_name": "libnss-mymachines",
"binary_version": "229-4ubuntu21.31+esm4"
},
{
"binary_name": "libnss-resolve",
"binary_version": "229-4ubuntu21.31+esm4"
},
{
"binary_name": "libpam-systemd",
"binary_version": "229-4ubuntu21.31+esm4"
},
{
"binary_name": "libsystemd0",
"binary_version": "229-4ubuntu21.31+esm4"
},
{
"binary_name": "libudev1",
"binary_version": "229-4ubuntu21.31+esm4"
},
{
"binary_name": "systemd",
"binary_version": "229-4ubuntu21.31+esm4"
},
{
"binary_name": "systemd-container",
"binary_version": "229-4ubuntu21.31+esm4"
},
{
"binary_name": "systemd-coredump",
"binary_version": "229-4ubuntu21.31+esm4"
},
{
"binary_name": "systemd-journal-remote",
"binary_version": "229-4ubuntu21.31+esm4"
},
{
"binary_name": "systemd-sysv",
"binary_version": "229-4ubuntu21.31+esm4"
},
{
"binary_name": "udev",
"binary_version": "229-4ubuntu21.31+esm4"
}
]
}