The ftp_QUIT function in ftpserver.py in pyftpdlib before 0.5.0 allows remote authenticated users to cause a denial of service (file descriptor exhaustion and daemon outage) by sending a QUIT command during a disallowed data-transfer attempt.
- http://code.google.com/p/pyftpdlib/issues/detail?id=71
- http://code.google.com/p/pyftpdlib/source/browse/trunk/HISTORY
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