[Python-Dev] Remove tempfile.mktemp()

Anders Munch ajm at flonidan.dk
Tue Mar 19 11:48:32 EDT 2019

Antoine Pitrou:
> And if there is an easy replacement, then how about re-implementing
> mktemp() using that replacement, instead of removing it?

Indeed.  The principal security issue with mktemp is the difficulty in creating a user-specific thing under a shared /tmp folder in a multi-user setup.

But if it hurts when you use /tmp, why use /tmp? Use a path with no world-accessible ancestor, or at least no world-writable ancestor.

On Windows, that means creating it somewhere under the CSIDL_LOCAL_APPDATA folder. Which is already the default for %TEMP% and %TMP%.
On Unix, it's a $HOME subfolder with access 700 or 600.
How about switching mktemp over to use that?

regards, Anders

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