Control: retitle -1 openssh-server: Can't login on any 32-bit box anymore after the server-side has been upgraded to 8.9p1: "debug1: expecting SSH2_MSG_KEX_ECDH_REPLY"
Hi, Axel Beckert wrote: > TL;DR: OpenSSH clients (at least 8.8 and 8.9) can't talk with OpenSSH > 8.9 servers in some cases (common property so far: if and only if it's > i386 on the server-side), Found another case, this time Sid armhf (a Raspberry Pi 2) on the server-side, i.e. also a 32-bit architecture: ~ → ssh -v 192.168.1.152 OpenSSH_8.9p1 Debian-2, OpenSSL 1.1.1m 14 Dec 2021 debug1: Reading configuration data /home/abe/.ssh/config debug1: /home/abe/.ssh/config line 1: Applying options for * debug1: Reading configuration data /etc/ssh/ssh_config debug1: /etc/ssh/ssh_config line 19: include /etc/ssh/ssh_config.d/*.conf matched no files debug1: /etc/ssh/ssh_config line 21: Applying options for * debug1: Connecting to 192.168.1.152 [192.168.1.152] port 22. debug1: Connection established. debug1: identity file /home/abe/.ssh/id_rsa type 0 debug1: identity file /home/abe/.ssh/id_rsa-cert type -1 debug1: identity file /home/abe/.ssh/id_ecdsa type 2 debug1: identity file /home/abe/.ssh/id_ecdsa-cert type -1 debug1: identity file /home/abe/.ssh/id_ecdsa_sk type -1 debug1: identity file /home/abe/.ssh/id_ecdsa_sk-cert type -1 debug1: identity file /home/abe/.ssh/id_ed25519 type 3 debug1: identity file /home/abe/.ssh/id_ed25519-cert type -1 debug1: identity file /home/abe/.ssh/id_ed25519_sk type -1 debug1: identity file /home/abe/.ssh/id_ed25519_sk-cert type -1 debug1: identity file /home/abe/.ssh/id_xmss type -1 debug1: identity file /home/abe/.ssh/id_xmss-cert type -1 debug1: identity file /home/abe/.ssh/id_dsa type -1 debug1: identity file /home/abe/.ssh/id_dsa-cert type -1 debug1: Local version string SSH-2.0-OpenSSH_8.9p1 Debian-2 debug1: Remote protocol version 2.0, remote software version OpenSSH_8.9p1 Debian-2 debug1: compat_banner: match: OpenSSH_8.9p1 Debian-2 pat OpenSSH* compat 0x04000000 debug1: Authenticating to 192.168.1.152:22 as 'abe' debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts2: No such file or directory debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: algorithm: curve25519-sha256 debug1: kex: host key algorithm: rsa-sha2-512 debug1: kex: server->client cipher: chacha20-poly1...@openssh.com MAC: <implicit> compression: none debug1: kex: client->server cipher: chacha20-poly1...@openssh.com MAC: <implicit> compression: none debug1: expecting SSH2_MSG_KEX_ECDH_REPLY ssh_dispatch_run_fatal: Connection to 192.168.1.152 port 22: Broken pipe Currently looks to me as if 8.9 on the server-side is generally broken iff the server runs on a 32-bit architectures. Al least all Sid 32-bit architecture boxes I tried so far, failed with the same symptoms. Regards, Axel -- ,''`. | Axel Beckert <a...@debian.org>, https://people.debian.org/~abe/ : :' : | Debian Developer, ftp.ch.debian.org Admin `. `' | 4096R: 2517 B724 C5F6 CA99 5329 6E61 2FF9 CD59 6126 16B5 `- | 1024D: F067 EA27 26B9 C3FC 1486 202E C09E 1D89 9593 0EDE