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FileZilla FTP Server <=0.9.21 Malformed PORT Denial of Service

This module triggers a Denial of Service condition in the FileZilla FTP Server versions 0.9.21 and earlier. By sending a malformed PORT command then LIST command, the server attempts to write to a NULL pointer.


Rank

  • Normal

Authors

  • patrick < patrick [at] osisecurity.com.au >

References


Development


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Usage Information

$ msfconsole

                ##                          ###           ##    ##
 ##  ##  #### ###### ####  #####   #####    ##    ####        ######
####### ##  ##  ##  ##         ## ##  ##    ##   ##  ##   ###   ##
####### ######  ##  #####   ####  ##  ##    ##   ##  ##   ##    ##
## # ##     ##  ##  ##  ## ##      #####    ##   ##  ##   ##    ##
##   ##  #### ###   #####   #####     ##   ####   ####   #### ###
                                      ##

msf > use auxiliary/dos/windows/ftp/filezilla_server_port
msf auxiliary(filezilla_server_port) > set RHOST [TARGET IP]
msf auxiliary(filezilla_server_port) > run


Module Options

FTPPASS The password for the specified username (default: mozilla@example.com)
FTPUSER The username to authenticate as (default: anonymous)
RHOST The target address
RPORT The target port (default: 21)
CHOST The local client address
CPORT The local client port
ConnectTimeout Maximum number of seconds to establish a TCP connection
FTPDEBUG Whether or not to print verbose debug statements
FTPTimeout The number of seconds to wait for a reply from an FTP command
Proxies Use a proxy chain
SSL Negotiate SSL for outgoing connections
SSLVersion Specify the version of SSL that should be used (accepted: SSL2, SSL3, TLS1)
VERBOSE Enable detailed status messages
WORKSPACE Specify the workspace for this module
TCP::max_send_size Maxiumum tcp segment size. (0 = disable)
TCP::send_delay Delays inserted before every send. (0 = disable)