[Bug 3780] connecting using KexAlgorithms list fails without spaces

[bugzilla-daemon at mindrot.org]

https://bugzilla.mindrot.org/show_bug.cgi?id=3780

--- Comment #4 from SG <sven.ginka at gmail.com> ---
additional notes:

- all ssh config is default (except root disabled, pass auth disabled)
- it looks like supplying more than one kex algorithm always stops,
waiting for the reply of the remote end (see ssh_failed_log).
- the connection is via a wireguard tunnel
- always using the same setup working fine for months on 40+ machines
and it occured recently (maybe after some apt update) only on a subset
of about 10 machines


client:

$ apt show openssh-client
Package: openssh-client
Version: 1:8.2p1-4ubuntu0.11
Priority: standard
Section: net
Source: openssh
Origin: Ubuntu

$ uname -a
Linux client 5.15.0-1062-aws #68~20.04.1-Ubuntu SMP Wed May 1 15:24:09
UTC 2024 x86_64 x86_64 x86_64 GNU/Linux

server:

$ apt show openssh-server 
Package: openssh-server
Version: 1:8.4p1-5+deb11u3+b1
Priority: optional
Section: net
Source: openssh (1:8.4p1-5+deb11u3)

$ uname -a
Linux myserver 6.1.21-v8+ #1642 SMP PREEMPT Mon Apr  3 17:24:16 BST
2023 aarch64 GNU/Linux

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