Re: [gentoo-dev] [RFC] Overlays and Metadata Cache

[Zac Medico <zmedico@gentoo.org>]

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Patrick Lauer wrote:
>>> The metadata cache is "inert" in the sense that it isn't executable
>>> code (and if anyone tries to execute it ... "You're doing it wrong"
>>> comes to mind"), so adding it does not pessimize the situation.
>> But generating that cache means running code, and one of the things
>> that code could do is modify every overlay distributed by the box in
>> question such that anyone using any of those overlays will run
>> arbitrary code whenever they do emerge -p world.
> 
> Good, this means we have to isolate it so that only each overlay itself exists 
> in an environment that generates the metadata cache. A bit bothersome, but 
> nothing more than adding a line or two to the script(s) that drive(s) this 
> process.

If you generate a user with a separate uid for each overlay then
that will probably be provide a sufficient level of privilege isolation.
- --
Thanks,
Zac
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