Crypt::Salt for Perl version 0.01 uses insecure rand() function when generating salts for cryptographic purposes.
https://security.metacpan.org/docs/guides/random-data-for-security.html
https://perldoc.perl.org/functions/rand
https://metacpan.org/release/HACHI/Crypt-Salt-0.01/source/lib/Crypt/Salt.pm#L76