Insecure tmpdir() use in dbtoepub.rb in docbook / xslt10-stylesheets

[Shlomi Fish <shlomif () gmail com>]

See:

https://github.com/docbook/xslt10-stylesheets/pull/144

«
See https://ruby-doc.org/stdlib-2.0.0/libdoc/tmpdir/rdoc/Dir.html -
tmpdir returns the same value everytime and as a result the tmpdirs can
be identical or existing.

SECURITY!

Thanks to phaul from #ruby .
»

There is a patch that seems to work well in the mageia linux package, but
no PoC exploit.


-- 
Shlomi Fish http://www.shlomifish.org/

Buddha has the Chuck Norris nature.

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