source: https://www.securityfocus.com/bid/7243/info

It has been reported that the EZ Server software does not sufficiently handle strings of excessive length in some circumstances. Because of this, a remote attacker may be able to deny service to legitimate users of the system. 

ls AX (where X is a value of A repeated an additional 1993 times)

cd AX (where X is a value of A repeated an additional 1994 times)