Double-free vulnerability in the getreply function in ftp.c in netkit ftp (netkit-ftp) 0.17 20040614 and later allows remote FTP servers to cause a denial of service (application crash) and possibly have unspecified other impact via some types of FTP protocol behavior. NOTE: the netkit-ftpd issue is covered by CVE-2007-????.

More... (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2007-5769)