A logical bug in the NAME_SERVICE_BANK contract

[letonchanh]

Besides the bug targeted by the NameServiceBank challenge, there is another logical flaw in the NAME_SERVICE_BANK contract that allows an attacker to steal the funds of a user whose username was set with a non-zero obfuscation degree. This logical bug is independent of the Solidity version, meaning the vulnerability exists regardless of the compiler used. It could be interesting to create a new NameServiceBank2 challenge that exploits this specific bug.

I can discuss the details offline.

[wafardev]

Hey! Can we discuss how to resolve the NameServiceBank challenge? Thanks!