Article View: comp.security.misc
Article #804Re: Setuid script - is this unsecure?
From: Jan Wortelboer
Date: Fri, 20 Nov 1992 13:50
Date: Fri, 20 Nov 1992 13:50
34 lines
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1682 bytes
hmj@cs.tut.fi (J{rvinen Hannu-Matti) writes:
>In article <AMOSS.92Nov6102549@shuldig.cs.huji.ac.il> amoss@shuldig.cs.huji.ac.il (Amos Shapira) writes:
>>A general suggestion for a programme which will do what you want would be:
>>
>>main (ac, av)
>> int ac;
>> char **av;
>>{
>> exec ("/usr/etc/mount", av);
>>}
>>
>>and have the object of this C programme suid root.
>Equivalent would be that you let anybody execute mount (i.e., set
>mount suid), which is not reasonable. Also you have to deny suid
>programs on the floppy, and ensure that there does not exist special
>devices on the floppy.
>I've written a set of programs (fdmkfs, fdmount, and fdumount) to give
>users access to the floppy. They are available by anonymous ftp on
>site cs.tut.fi (130.230.4.2), file pub/src/tut/floppy.shar. Use on
>your own risk.
Everybode executing mount isn't indeed a good idea:
How about mount /dev/fd /etc
Jan.
--
Jan Wortelboer, University of Amsterdam
Computer Science Department Email: janw@fwi.uva.nl
Unix Kruislaan 403 Kamer F003 Phone: +31 20 525 7501
systems manager 1098 SJ AMSTERDAM Fax : +31 20 525 7490
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Newsgroups: comp.security.misc Path: arc1-ca.pugleaf.net!sparky!uunet!mcsun!sun4nl!fwi.uva.nl!janw From: janw@fwi.uva.nl (Jan Wortelboer) Subject: Re: Setuid script - is this unsecure? Message-ID: <1992Nov20.135059.24347@fwi.uva.nl> Sender: news@fwi.uva.nl Nntp-Posting-Host: mail.fwi.uva.nl Organization: FWI, University of Amsterdam References: <1992Nov5.071354.24042@kth.se> <AMOSS.92Nov6102549@shuldig.cs.huji.ac.il> <1eg5tmINN9eh@cs.tut.fi> Date: Fri, 20 Nov 1992 13:50:59 GMT Lines: 34