I hilariously discovered this last night as well (playing with IMA), and
removing the creation of that attr would be a huge step back.

Restricting the execution of files one downloads or disabling macros on
word documents you download and open would be a huge security win.

These attributes are destroyed by merely coping the file, and are on the
filesystem, not the file. It's not like sending a file via email leaks
where I downloaded it from.

For most users, this attribute, if we start actually using it, would
massively protect, not hurt their security.

Paul



On Dec 7, 2017 8:09 AM, "Holger Levsen" <hol...@layer-acht.org> wrote:

> On Thu, Dec 07, 2017 at 05:58:31PM +0500, Andrey Rahmatullin wrote:
> > On Thu, Dec 07, 2017 at 12:50:06PM +0000, Holger Levsen wrote:
> > > > > Ah, damnit.  It supports *some* xattrs (like the security
> namespace),
> > > > > but apparently not *user* xattrs.
> > > > Good.  While xattrs have some uses, this is a hidden privacy hole
> most users
> > > > aren't aware of
> > >
> > > could you be so kind to explain that hidden hole? that would maybe help
> > > with more people being aware…
> > When you download a file, its original location is saved and can be
> > retrieved.
>
> ah, so it's a privacy hole in certain tools, but not in xattr.
>
> how about filing bugs for those issues then?
>
>
> --
> cheers,
>         Holger
>

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