Mechanic- blown brake lines undetectable because rotted inside-out,possible? on 2000 Dodge Durango

Rear brake lines blew on hwy while out of town. Brake lines in both zones heavily corroded. Vehicle bought new,serviced every 3 months by same mechanic> Repair fixed out of town

3 answers
it is possible but not likely brake lines rust because of weather conditions you should have the vehicle udercoated
under coating will not help now. sorry. have total under carriage insp for other damage while repl brk lines,im sure there are other issues
IMPOSSIBLE and UNLIKELY to have brake lines rust FROM THE INSIDE!!! Outside, yes, for sure but definitely not from the INSIDE, it is filled with brake fluid!