On 2008-08-15 21:16 +0200, Andrei Popescu wrote:

> On Fri,15.Aug.08, 16:05:13, Sven Joachim wrote:
>> However, Nico Golde informed me that mktemp has a `-u' switch which will
>> unlink the file before mktemp exits.  If you use that, the easy-to-guess
>> filename becomes a severe problem.
>  
> I must be dense, could you please elaborate on how this can be a 
> problem?

It opens precisely the can of worms that mktemp was supposed to close,
see the mktemp(1) and mktemp(3) manpages.  Look for "symlink attack" in
your preferred Web search engine.

Sven


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