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Nano in chroot ssh jail

Asked by Brandon McGlumphy

I created a chroot jail for SSH. I downloaded a script that autocreates a jail in /home/jail/home/user but it didnt copy over Nano. I copied Nano from /bin/ into /home/jail/bin/ but when I try to load it I get this error:

nano: error while loading shared libraries: libncursesw.so.5: cannot open shared object file: No such file or directory

The libncurses is in /home/jail/lib/ but do I need to do something else to get Nano to work in the jail?

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Dario Teixeira (darioteixeira) said : 		#1

First point: did you run "ldd `which nano`" to be sure you copied into the jail *all* the libraries that nano depends upon?

As the second step, I would make that the libraries copied into the jail correspond faithfully to the structure normally found in /usr/lib. Did you create the proper symlinks, for example?

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Brandon McGlumphy (brandonmcglumphy) said : 		#2

All I did was 'cp /bin/nano /home/jail/bin'. Didnt realize there was more to it.

I just did ldd nano and here's what it spits out:

linux-gate.so.1 => (0xffffe000)
        libncursesw.so.5 => /lib/libncursesw.so.5 (0xb7ea2000)
        libc.so.6 => /lib/tls/i686/cmov/libc.so.6 (0xb7d58000)
        libdl.so.2 => /lib/tls/i686/cmov/libdl.so.2 (0xb7d54000)
        /lib/ld-linux.so.2 (0xb7f05000)

Think you could give me some steps as to what to do?

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Kris Marsh (moogman) said : 		#3

Hi,

You will need to basically copy some of the files such that nano can find the files in the directories it expects. Assuming your jail is set to /home/jail, you will need the following:

/home/jail/lib/linux-gate.so.1
/home/jail/lib/libncursesw.so.5
/home/jail/lib/tls/i686/cmov/libc.so.6
/home/jail/lib/tls/i686/cmov/libdl.so.2
/home/jail/lib/ld-linux.so.2

Give nano another go then, and if that doesn't work, see what output you get from ldd (and possibly repeat the above process).

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