"Bad packet length 1231976033"

Philip Prindeville philipp_subx at redfish-solutions.com
Tue Apr 25 10:29:59 AEST 2023

> On Apr 24, 2023, at 6:22 PM, Darren Tucker <dtucker at dtucker.net> wrote:
> On Tue, 25 Apr 2023 at 03:36, Philip Prindeville
> <philipp_subx at redfish-solutions.com> wrote:
>>> On Apr 10, 2023, at 7:24 AM, Darren Tucker <dtucker at dtucker.net> wrote:
> [...]
>>> Since you're using 9.1, the message could be an "Invalid free", since
>>> there was a double-free bug in that release :-(
>> Forgot to ask: does this bug manifest at any particular time, or just connection initiation?
>> Because I can see it happen on a connection that's been up for days... either idle or experiencing heavy traffic... etc.
> Only at connection initiation, and only when the client is an old
> version of PuTTY that doesn't support the modern form of the
> diffie-hellman group exchange protocol.

Okay.  I'm using Openssh 9.1p1 between Ubuntu and OpenWrt, or Openssh 9.0p1 on MacOS 13.3.1.

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