Mercurial > dropbear
view signkey_ossh.h @ 1930:299f4f19ba19
Add /usr/sbin and /sbin to default root PATH
When dropbear is used in a very restricted environment (such as in a
initrd), the default user shell is often also very restricted
and doesn't take care of setting the PATH so the user ends up
with the PATH set by dropbear. Unfortunately, dropbear always
sets "/usr/bin:/bin" as default PATH even for the root user
which should have /usr/sbin and /sbin too.
For a concrete instance of this problem, see the "Remote Unlocking"
section in this tutorial: https://paxswill.com/blog/2013/11/04/encrypted-raspberry-pi/
It speaks of a bug in the initramfs script because it's written "blkid"
instead of "/sbin/blkid"... this is just because the scripts from the
initramfs do not expect to have a PATH without the sbin directories and
because dropbear is not setting the PATH appropriately for the root user.
I'm thus suggesting to use the attached patch to fix this misbehaviour (I
did not test it, but it's easy enough). It might seem anecdotic but
multiple Kali users have been bitten by this.
From https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=903403
author | Raphael Hertzog <hertzog@debian.org> |
---|---|
date | Mon, 09 Jul 2018 16:27:53 +0200 |
parents | ced53051e200 |
children |
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#ifndef DROPBEAR_SIGNKEY_OSSH_H_ #define DROPBEAR_SIGNKEY_OSSH_H_ #include "signkey.h" /* Helpers for OpenSSH format keys in dropbearconvert */ void buf_put_rsa_priv_ossh(buffer *buf, const sign_key *akey); int buf_get_rsa_priv_ossh(buffer *buf, sign_key *akey); void buf_put_ed25519_priv_ossh(buffer *buf, const sign_key *akey); int buf_get_ed25519_priv_ossh(buffer *buf, sign_key *akey); void buf_put_ecdsa_priv_ossh(buffer *buf, const sign_key *akey); int buf_get_ecdsa_priv_ossh(buffer *buf, sign_key *akey); #endif /* DROPBEAR_SIGNKEY_OSSH_H_ */