Ya take a long rod, weld on a 1/4 inch drill bit on one end and a Phillips head on the other, and drill a hole into the tail block, right down to the neck block and into the heal...
then you slip a big screw in thru the sound hole and use the other end of the rod to screw it through the whole body, block and all right into the neck. Be sure to slather on a lot of that there cheap 5 min epoxy before screwin it all up.
Or before you go and screw it all up....I mean together,
you could take it to one of us loofers to get it fixed professionally ...but that would cost BIG bucks and wtf, if its only a wall flower queenie...just screw it.
Ps . Ya ... you could do the quick and dirty fix as well ... just screw or nail the neck to the body...Hey, don't laugh, how do you think Stradivarius attached his necks. Spit and chewy gum? Not.
This repair tip brought to you courtesy of duh Padma~pa School of Looering Around.