FTPServer.py in pyftpdlib before 0.2.0 does not increment the attempted_logins count for a USER command that specifies an invalid username, which makes it easier for remote attackers to obtain access via a brute-force attack.Referenceshttp://code.google.com/p/pyftpdlib/source/browse/trunk/HISTORYhttp://code.google.com/p/pyftpdlib/issues/detail?id=20http://code.google.com/p/pyftpdlib/source/diff?spec=svn23&r=23&format=side&path=/trunk/pyftpdlib/FTPServer.pyhttp://code.google.com/p/pyftpdlib/source/detail?r=23
