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Network Security Snort-Signatures
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Re: [Snort-sigs] seeing hits on ftp_pp: FTP malformed parameter

from [Russell Fulton] Network Security [Permanent Link]
Subject: Re: [Snort-sigs] seeing hits on ftp_pp: FTP malformed parameter
Date: Mon, 01 Oct 2007 10:06:16 +1300 


Matthew Watchinski wrote:

Have you modified your ftp_telnet_protocol configuration?  Do you have a
cmd_validty line for MKD ?
  


No:

preprocessor ftp_telnet_protocol: ftp server default \
   def_max_param_len 100 \
   alt_max_param_len 200 { CWD } \
   cmd_validity MODE < char ASBCZ > \
   cmd_validity MDTM < [ date nnnnnnnnnnnnnn[.n[n[n]]] ] string > \
   chk_str_fmt { USER PASS RNFR RNTO SITE MKD } \
   ftp_cmds { EPSV XPWD XCWD XCUP XMKD XRMD} \
   telnet_cmds yes \
   data_chan


On a side note I've had to add EPSV to ftp_cmds as many modern
implementations use it -- might be a good idea to add it to the list in
the readme and the default snort.conf.

Russell

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