OSEC

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Bugtraq archives for 3rd quarter (Jul-Aug) 1995: Re: -rw-rw-rw- 1 root 8025 Aug 24 04:10

Re: -rw-rw-rw- 1 root 8025 Aug 24 04:10

Dave Roberts (djrhaddock.saa-cons.co.uk)
Tue, 29 Aug 1995 14:08:28 +0100 

On Fri, 25 Aug 1995, Darren Reed wrote:

> People designing setuid-root programs or programs in general which perform
> priviledged operations and need temporary files should consider using a
> non-public access directory as the temp. file location.

What about using the tempnam() call?  Maybe it's not available on all
platforms although it is on AIX, SCO and HP-UX, so I'd have thought it
would be.

Do you feel that the randomness of the filenames this returns is not
random enough?  Or is it that the very nature of a file that the world can
get at is the security threat, no matter what permissions are in
existence.  I'd have thought that having /tmp mode 1777, using tempnam()
to get the file name, and creating this file in mode 0600 would be
sufficient.


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