ftpserver.py in pyftpdlib before 0.5.0 does not delay its response after receiving an invalid login attempt, which makes it easier for remote attackers to obtain access via a brute-force attack.Referenceshttp://code.google.com/p/pyftpdlib/source/diff?spec=svn348&r=348&format=side&path=/trunk/pyftpdlib/ftpserver.pyhttp://code.google.com/p/pyftpdlib/source/browse/trunk/HISTORYhttp://code.google.com/p/pyftpdlib/issues/detail?id=73http://code.google.com/p/pyftpdlib/source/detail?r=348
