GNU bug report logs - #19479
Package manager vulnerable

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Message #164 received at 19479 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Monnier <monnier <at> iro.umontreal.ca>
To: Stefan Kangas <stefan <at> marxist.se>
Cc: 19479 <at> debbugs.gnu.org, Noam Postavsky <npostavs <at> gmail.com>
Subject: Re: bug#19479: Package manager vulnerable to replay attacks
Date: Wed, 25 Nov 2020 22:11:35 -0500

> How about adding this check in addition to the checksum check?

I think we should add this check in any case, yes.

> Having two separate checks together should surely bring more
> confidence than either of them would separately.  That sounds like
> good "defense in depth" thinking to me.

I'm not sure the added hash is needed, but it seems reasonably harmless.

>> I think we'd want to keep the signatures anyway, e.g. they can still be
>> checked manually for old tarballs which aren't listed in
>> `archive-contents` any more.  And more generally they allow
>> authenticating the origin of a package without having to look it up in
>> `archive-contents`.
> Valid points.  Let's keep them indefinitely.

Especially since some people seem interested to add commands to
`package.el` to programatically install old packages.


        Stefan

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