Re: [Sidrops] trying to limit RP processing variability
Martin Hoffmann <martin@opennetlabs.com> Thu, 16 April 2020 15:55 UTC
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Date: Thu, 16 Apr 2020 17:55:31 +0200
From: Martin Hoffmann <martin@opennetlabs.com>
To: Job Snijders <job@ntt.net>
Cc: sidrops@ietf.org
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Subject: Re: [Sidrops] trying to limit RP processing variability
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Job Snijders wrote: > On Thu, Apr 16, 2020, at 15:30, Randy Bush wrote: > > >>> An attacker who can delete files can as easily replace them with > > >>> something else with the same result. > > >> not really. > > > I cannot think of a case where an attack can manipulate the rsync > > > exchange, impersonate the rsync server, or manipulate the file > > > system of the legitimate rsync server in such a way that they can > > > signal to an rsync client to delete existing files but not to > > > replace them partially or completely. > > > > > > What am I missing? > > > > 6486 4.2 > > > > fileList: > > This field is a sequence of FileAndHash objects. There is one > > FileAndHash entry for each currently valid signed object that > > has been published by the authority (at this publication point). > > Each FileAndHash is an ordered pair consisting of the name of the > > file in the repository publication point (directory) that contains > > the object in question and a hash of the file's contents. > > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > > I think I see an instance of miscommunication: > > I think Martin's perspective is that whether the files are deleted or > modified by MITM, the RP outcome is the same: the PP has to be > tossed. I don't think Martin suggested that files can trivially be > replaced, just that deletion or tampering have the same effect. > > Right? Correct. This was solely about synchronisation of a publication point, not yet about validation. Kind regards, Martin
- [Sidrops] trying to limit RP processing variabili… Stephen Kent
- Re: [Sidrops] trying to limit RP processing varia… Job Snijders
- Re: [Sidrops] trying to limit RP processing varia… Stephen Kent
- Re: [Sidrops] trying to limit RP processing varia… Job Snijders
- Re: [Sidrops] trying to limit RP processing varia… Robert Kisteleki
- Re: [Sidrops] trying to limit RP processing varia… Martin Hoffmann
- Re: [Sidrops] trying to limit RP processing varia… Stephen Kent
- Re: [Sidrops] trying to limit RP processing varia… Di Ma
- Re: [Sidrops] trying to limit RP processing varia… Robert Kisteleki
- Re: [Sidrops] trying to limit RP processing varia… Claudio Jeker
- Re: [Sidrops] trying to limit RP processing varia… Stephen Kent
- Re: [Sidrops] trying to limit RP processing varia… Robert Kisteleki
- Re: [Sidrops] trying to limit RP processing varia… Martin Hoffmann
- Re: [Sidrops] trying to limit RP processing varia… Job Snijders
- Re: [Sidrops] trying to limit RP processing varia… Stephen Kent
- Re: [Sidrops] trying to limit RP processing varia… Stephen Kent
- Re: [Sidrops] trying to limit RP processing varia… Martin Hoffmann
- Re: [Sidrops] trying to limit RP processing varia… Di Ma
- Re: [Sidrops] trying to limit RP processing varia… Job Snijders
- Re: [Sidrops] trying to limit RP processing varia… Martin Hoffmann
- Re: [Sidrops] trying to limit RP processing varia… Claudio Jeker
- Re: [Sidrops] trying to limit RP processing varia… Tim Bruijnzeels
- Re: [Sidrops] trying to limit RP processing varia… Tim Bruijnzeels
- Re: [Sidrops] trying to limit RP processing varia… Jay Borkenhagen
- Re: [Sidrops] trying to limit RP processing varia… Randy Bush
- Re: [Sidrops] trying to limit RP processing varia… Robert Kisteleki
- Re: [Sidrops] trying to limit RP processing varia… Martin Hoffmann
- Re: [Sidrops] trying to limit RP processing varia… Tim Bruijnzeels
- Re: [Sidrops] trying to limit RP processing varia… Martin Hoffmann
- Re: [Sidrops] trying to limit RP processing varia… Martin Hoffmann
- Re: [Sidrops] trying to limit RP processing varia… Randy Bush
- Re: [Sidrops] trying to limit RP processing varia… Stephen Kent
- Re: [Sidrops] trying to limit RP processing varia… Stephen Kent
- Re: [Sidrops] trying to limit RP processing varia… Stephen Kent
- Re: [Sidrops] trying to limit RP processing varia… Job Snijders
- Re: [Sidrops] trying to limit RP processing varia… Claudio Jeker
- Re: [Sidrops] trying to limit RP processing varia… Martin Hoffmann
- Re: [Sidrops] trying to limit RP processing varia… Martin Hoffmann
- Re: [Sidrops] trying to limit RP processing varia… Randy Bush
- Re: [Sidrops] trying to limit RP processing varia… Stephen Kent
- Re: [Sidrops] trying to limit RP processing varia… Stephen Kent
- Re: [Sidrops] trying to limit RP processing varia… George Michaelson
- Re: [Sidrops] trying to limit RP processing varia… Tim Bruijnzeels
- Re: [Sidrops] trying to limit RP processing varia… Martin Hoffmann
- Re: [Sidrops] trying to limit RP processing varia… Martin Hoffmann
- Re: [Sidrops] trying to limit RP processing varia… Randy Bush
- Re: [Sidrops] trying to limit RP processing varia… Stephen Kent
- Re: [Sidrops] trying to limit RP processing varia… Rob Austein
- Re: [Sidrops] trying to limit RP processing varia… Job Snijders
- Re: [Sidrops] trying to limit RP processing varia… Stephen Kent