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Re: setuid from shellscript isn't permanent

From: Aras Vaichas
Subject: Re: setuid from shellscript isn't permanent
Date: Mon, 21 Jul 2008 15:31:10 +1000
User-agent: Thunderbird (X11/20080227)

Bob Proulx wrote:
> Mr Aras wrote:
>> $ ./setuid_test_script.sh
>> mode of `/nfsroot/bin/busybox' changed to 4755 (rwsr-xr-x)
>> -rwsr-xr-x 1 root root 515956 2008-07-18 11:46 /nfsroot/bin/busybox
>> $ ls /nfsroot/bin/busybox
>> -rwxr-xr-x 1 root root 515956 2008-07-18 11:45 /nfsroot/bin/busybox
> With only this information I would have to guess that even though you
> have a command that it doing the chmod one way that there must be
> another command that is changing it back.
> Try running with 'bash -x ./setuid_test_script.sh' in order to trace
> your script commands.  I expect to see that there is another one that
> you are not expecting that is running.
Arg! You were right, there was a Busybox install script which I thought
was only creating symlinks, but it also re-installed Busybox and changed
the mode back to 0755. Silly me ...

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