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Busybox : Using fallback suid method
  • XavierJXavierJ September 2010
    Hello,

    I got this message (Busybox : Using fallback suid method) when I login as a user other than root and each time I use a command.
    I'm using a base slitaz without X.
    I know this message is show when a user try to use a command of busybox although he doen't has the execute permission.
    But here, all my standard commands are in 777 mode and busybox is ok too.

    I may have something to do with my passwd file: it has been copied from another system, along with shadow, group and gshadow.

    Is there a busybox expert to help me ?
  • LexeiiLexeii September 2010
    Xavier, 777 is basic permissions (-rwxrwxrwx); SUID, SGID and sticky bit is extended permissions.
    Please, check permissions using command 
    ls -l /bin/busybox
    Is it -rwsrwxrwx?
    So, you need to reset SUID bit.

    Read more about SUID, SGID and sticky bit.
  • babaorumbabaorum September 2010
    Hi, I guess that not readable would be much more secure for a base utility as busybox, besides managing sticky bit etc ;-)
    If you accidentally overwrite busybox contents, you lose your shell, nothing less.
  • XavierJXavierJ September 2010
    I have set the SUID bit on the busybox file and the problem is fixed, thank you.
    (Busybox is not writeable, don't worry :-)

    So busybox has to be run as root, and when it can't, it still does but print a message ?
  • LexeiiLexeii September 2010
    Oh, I'm sorry, Xavier! Really set, not reset. I wrote this from my memory.
    Next, this is from my regular SliTaz 3.0:
    tux@slitaz:~$ ls -l /bin/busybox 
    -rwsr-xr-x    1 root     root       544784 Mar 12 19:26 /bin/busybox

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