On Thu, Mar 09, 2017 at 01:37:35PM -0700, Warren Young wrote:
> On Mar 9, 2017, at 1:03 PM, Richard Hipp <d...@sqlite.org> wrote:
> > 
> > If a new artifact Y' which has the
> > same SHA1 hash as Y comes along, it will be discarded, since an
> > artifact with that same hash is already in the repository.
> 
> That can be gotten around with a MITM attack, as I’ve already brought
> up several times on the list.  Many Fossil instances won’t have TLS
> protection against MITM attacks, and those that do have it may be
> weakened by some well-intentioned TLS-busting middlebox or antimalware
> package.

It still only matters if you can *introduce* objects. MITM for a given
repository with sensible content requires a second preimage attachk.
Those are not possible on any kind of (un)realistic budget.

Joerg
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