| From: | Heikki Linnakangas <hlinnaka(at)iki(dot)fi> |
|---|---|
| To: | Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com>, Michael Paquier <michael(at)paquier(dot)xyz> |
| Cc: | Postgres hackers <pgsql-hackers(at)postgresql(dot)org>, Robert Haas <robertmhaas(at)gmail(dot)com>, Magnus Hagander <magnus(at)hagander(dot)net>, Stephen Frost <sfrost(at)snowman(dot)net>, Bruce Momjian <bruce(at)momjian(dot)us> |
| Subject: | Re: SCRAM with channel binding downgrade attack |
| Date: | 2018-06-06 20:26:00 |
| Message-ID: | 8228733d-9a32-ea87-9352-dede06ba686b@iki.fi |
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| Lists: | pgsql-hackers pgsql-www |
On 06/06/18 23:20, Peter Eisentraut wrote:
> Aren't we attacking this on the wrong level? We are here attempting to
> prevent a SCRAM-SHA-256-PLUS -> SCRAM-SHA-256 downgrade, but we are not
> preventing a SCRAM-SHA-256-PLUS -> anything-else downgrade.
The latest patch does prevent that, too. That was my complaint at
https://www.postgresql.org/message-id/030284cc-d1d6-ce88-b677-a814f61c1880%40iki.fi,
but it's been fixed now. (Or if you see a case where it still isn't,
that's a bug.)
- Heikki
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