Clumsy socat authentication

socat_auth.txt

Almost certainly vulnerable; kind of neat anyways. DO NOT USE for anything important.

#                vvvv<-PORT                              PASSWORD->vvvvvvvv     vvvv<-SECURE COMMAND
socat tcp-listen:8080,reuseaddr,fork system:"head -n 1 | grep -q '^password' && date"

Connecting:
$ echo password | nc remote 8080          # succeeds
Mon Sep 20 21:29:36 EDT 2021
$ echo notthepassword | nc remote 8080    # fails
$ echo passwordaaaaaa | nc remote 8080    # still succeeds with extra content following... use $ in grep to prevent
Mon Sep 20 21:29:47 EDT 2021