Article View: comp.security.misc
Article #733Re: Ftp'ing out of a chroot()ed environment
From: Charles Howes
Date: Tue, 17 Nov 1992 03:09
Date: Tue, 17 Nov 1992 03:09
31 lines
1727 bytes
1727 bytes
>smd@sl0091.srl.ford.com (Steve Dahmen) writes:
] Does anybody understand chroot and ftp/telnet enough to tell me why
] I can't get ftp nor telnet to run in my chrooted account?? I'd like
] to set up a user zone to allow simple ftp/telnet through without opening
] my whole system.
]
] I did a dump -n on the binaries and ensured the requested libraries are
] available in the chrooted environment. Do I need anything special in
] /etc (I have resolv.conf) or /dev???
]
] Help.
I recommend doing a 'trace' on telnet in the normal environment, and
massaging the output of that to get a list of the directories and files you
need to migrate. Here's a new-awk script that converts the trace output
file into the appropriate commands:
=========================fix.awk=============================================
$1 ~ /^(open|stat|creat|unlink)$/ {
sub("^[^\"]*\"","");
sub("\".*$","");
for (x=2;x<=length($0);x++)
if (substr($0,x,1)=="/") print "mkdir ~ftp"substr($0,1,x)
if ($0 ~ /\/./) print "cp "$0" ~ftp"$0
}
=============================================================================
So type:
trace -o output /usr/ucb/ftp somehost.edu
nawk -f fix.awk output > file1
sort -u < file1 > result
vi result
source result
Technical Details
Message-ID:
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arc1-ca.pugleaf.net!sparky!uunet!gumby!destroyer!cs.ubc.ca!newsserver.sfu.ca!howesbReferences:
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Newsgroups: comp.security.misc Path: arc1-ca.pugleaf.net!sparky!uunet!gumby!destroyer!cs.ubc.ca!newsserver.sfu.ca!howesb From: howesb@monashee.sfu.ca (Charles Howes) Subject: Re: Ftp'ing out of a chroot()ed environment Message-ID: <1992Nov17.030943.4561@sfu.ca> Sender: news@sfu.ca Organization: Simon Fraser University, Burnaby, B.C., Canada References: <1e8od6INN1b4@ef2007.efhd.ford.com> <BxtxxJ.K4n@news.iastate.edu> Date: Tue, 17 Nov 1992 03:09:43 GMT Lines: 31