X forwarding vs Remote DISPLAY


 
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Special Forums Cybersecurity X forwarding vs Remote DISPLAY
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Old 08-22-2012
X forwarding vs Remote DISPLAY

Hello,
I have a question about X forwarding. I was told that we can't X forwarding anymore, do to a security checklist.
Example:
Code:
bitlord@server1# ssh -X server2

So we have to use the DISPLAY variable now. I thought this was less secure?
Example:
Code:
bitlord@server1# xhost + server2
server1 being added to access control list
bitlord@server1# echo $DISPLAY
:1.0
bitlord@server1#  ssh server2
bitlord@server2# export DISPLAY=server1:1.0
bitlord@server1# gedit #for example

What gives, is this more or less secure the X forwarding? Is there a better way?

Any info would be helpful
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FORWARD(5)						      BSD File Formats Manual							FORWARD(5)

NAME
forward -- mail forwarding instructions DESCRIPTION
The .forward file contains a list of mail addresses or programs that the user's mail should be redirected to. If the file is not present, then no mail forwarding will be done. Mail may also be forwarded as the standard input to a program by prefixing the line with the normal shell pipe symbol (|). If arguments are to be passed to the command, then the entire line should be enclosed in quotes. For security rea- sons, the .forward file must be owned by the user the mail is being sent to, or by root, and the user's shell must be listed in /etc/shells. For example, if a .forward file contained the following lines: nobody@NetBSD.org "|/usr/bin/vacation nobody" Mail would be forwarded to <nobody@NetBSD.org> and to the program /usr/bin/vacation with the single argument nobody. If a local user address is prefixed with a backslash character, mail is delivered directly to the user's mail spool file, bypassing further redirection. For example, if user chris had a .forward file containing the following lines: chris@otherhost chris One copy of mail would be forwarded to chris@otherhost and another copy would be retained as mail for local user chris. FILES
$HOME/.forward The user's forwarding instructions. SEE ALSO
aliases(5), mailaddr(7), sendmail(8) BSD
July 2, 1996 BSD