Design/Logic Flaw

An issue was discovered in phpMyAdmin. It is possible to bypass AllowRoot restriction $cfg'Servers'$i'AllowRoot' and deny rules for username by using Null Byte in the username. All 4.6.x versions prior to 4.6.5, 4.4.x versions prior to 4.4.15.9, and 4.0.x versions prior to 4.0.10.18 are affected...