What about mkstemp vs. mktemp in binutils?

Alan Modra amodra@bigpond.net.au
Sun Feb 17 04:18:00 GMT 2002


On Sun, Feb 17, 2002 at 11:35:24AM +0100, Christian Jönsson wrote:
> /home/chj/src/objdir/binutils/../../binutils/bucomm.c:236: the use of `mktemp' is dangerous, better use `mkstemp'
> 
> Is this something to worry about? 

Don't panic, but there is a possible security hole opened by using
mktemp.  The problem being that between mktemp deciding that a given
name in /tmp is OK for a temp file and actually opening the file,
someone could insert a symbolic link with that name pointing to
something like /etc/passwd.  You don't compile as root, do you?

-- 
Alan Modra
IBM OzLabs - Linux Technology Centre

BTW, you need to fix your Mail-Followup-To.



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