The DHCP client (udhcpc) in BusyBox before 1.20.0 allows remote DHCP servers to execute arbitrary commands via shell metacharacters in the (1) HOSTNAME, (2) DOMAINNAME, (3) NISDOMAIN, and (4) TFTPSERVER_NAME host name options.
{
"binaries": [
{
"binary_name": "busybox",
"binary_version": "1:1.21.0-1ubuntu1"
},
{
"binary_name": "busybox-initramfs",
"binary_version": "1:1.21.0-1ubuntu1"
},
{
"binary_name": "busybox-static",
"binary_version": "1:1.21.0-1ubuntu1"
},
{
"binary_name": "busybox-syslogd",
"binary_version": "1:1.21.0-1ubuntu1"
},
{
"binary_name": "busybox-udeb",
"binary_version": "1:1.21.0-1ubuntu1"
},
{
"binary_name": "udhcpc",
"binary_version": "1:1.21.0-1ubuntu1"
},
{
"binary_name": "udhcpd",
"binary_version": "1:1.21.0-1ubuntu1"
}
],
"availability": "No subscription required"
}