Bug#908113: openssh-client: When I try to connect to a remote SSH server I got broken-pipe error
Package: openssh-client
Version: 1:7.4p1-10+deb9u4
Severity: important
Tags: upstream
Dear Maintainer,
I want to report an issue that appears after installation of latest version of
openssh-client (1:7.8p1-1)
When I try to push source code on our enterprise gitlab repository I'm
encountering a broken pipe error.
I tryed to investigate more deeply and when I try to connect to my home server
I got the same issue. You can see log of ssh below.
When I try to connect to localhost it works perfectly.
My best clue is if there is a lot of chars retrieved after connection, the
connection hangs. On my home server I have linuxlogo which dumps an ascii art
logo.
I also tryed to stop ssh server and autossh but it changed nothing.
Reverting back to old openssh-client solved the problem (1:7.4p1-10+deb9u4)
Thank you
> ssh -vvvv XXX@tangserver
OpenSSH_7.8p1 Debian-1, OpenSSL 1.0.2o 27 Mar 2018
debug1: Reading configuration data /root/.ssh/config
debug1: /root/.ssh/config line 1: Applying options for tangserver
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug2: resolving "tangserver" port 22
debug2: ssh_connect_direct
debug1: Connecting to tangserver [XX.XX.XX.XX] port 22.
debug1: Connection established.
debug1: identity file /root/.ssh/id_rsa.home@tangserver type -1
debug1: identity file /root/.ssh/id_rsa.home@tangserver-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_7.8p1 Debian-1
debug1: Remote protocol version 2.0, remote software version OpenSSH_7.8p1
Debian-1
debug1: match: OpenSSH_7.8p1 Debian-1 pat OpenSSH* compat 0x04000000
debug2: fd 3 setting O_NONBLOCK
debug1: Authenticating to tangserver:22 as 'XXXX'
debug3: hostkeys_foreach: reading file "/root/.ssh/known_hosts"
debug3: record_hostkey: found key type RSA in file /root/.ssh/known_hosts:1
debug3: load_hostkeys: loaded 1 keys from tangserver
debug3: order_hostkeyalgs: prefer hostkeyalgs: rsa-
sha2-512-cert-v01@openssh.com,rsa-sha2-256-cert-v01@openssh.com,ssh-rsa-
cert-v01@openssh.com,rsa-sha2-512,rsa-sha2-256,ssh-rsa
debug3: send packet: type 20
debug1: SSH2_MSG_KEXINIT sent
debug3: receive packet: type 20
debug1: SSH2_MSG_KEXINIT received
debug2: local client KEXINIT proposal
debug2: KEX algorithms: curve25519-sha256,curve25519-sha256@libssh.org,ecdh-
sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-
exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-
group18-sha512,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1,ext-
info-c
debug2: host key algorithms: rsa-sha2-512-cert-v01@openssh.com,rsa-
sha2-256-cert-v01@openssh.com,ssh-rsa-cert-v01@openssh.com,rsa-sha2-512,rsa-
sha2-256,ssh-rsa,ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-
sha2-nistp384-cert-v01@openssh.com,ecdsa-
sha2-nistp521-cert-v01@openssh.com,ssh-ed25519-cert-v01@openssh.com,ecdsa-
sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519
debug2: ciphers ctos:
chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com
debug2: ciphers stoc:
chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com
debug2: MACs ctos: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-
sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-
sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-
sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-
sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-
sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-
sha2-256,hmac-sha2-512,hmac-sha1
debug2: compression ctos: none,zlib@openssh.com,zlib
debug2: compression stoc: none,zlib@openssh.com,zlib
debug2: languages ctos:
debug2: languages stoc:
debug2: first_kex_follows 0
debug2: reserved 0
debug2: peer server KEXINIT proposal
debug2: KEX algorithms: curve25519-sha256,curve25519-sha256@libssh.org,ecdh-
sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-
exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-
group18-sha512,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1
debug2: host key algorithms: rsa-sha2-512,rsa-sha2-256,ssh-rsa
debug2: ciphers ctos:
chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com
debug2: ciphers stoc:
chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com
debug2: MACs ctos: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-
sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-
sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-
sha2-256,hmac-sha2-512,hmac-sha1
debug2: MACs stoc: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-
sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-
sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-
sha2-256,hmac-sha2-512,hmac-sha1
debug2: compression ctos: none,zlib@openssh.com
debug2: compression stoc: none,zlib@openssh.com
debug2: languages ctos:
debug2: languages stoc:
debug2: first_kex_follows 0
debug2: reserved 0
debug1: kex: algorithm: curve25519-sha256
debug1: kex: host key algorithm: rsa-sha2-512
debug1: kex: server->client cipher: chacha20-poly1305@openssh.com MAC:
<implicit> compression: none
debug1: kex: client->server cipher: chacha20-poly1305@openssh.com MAC:
<implicit> compression: none
debug3: send packet: type 30
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug3: receive packet: type 31
debug1: Server host key: ssh-rsa
SHA256:zrjES+19naGVve6s/xc9yEvPn1eJyi16hWoTwo/YfWI
debug3: hostkeys_foreach: reading file "/root/.ssh/known_hosts"
debug3: record_hostkey: found key type RSA in file /root/.ssh/known_hosts:1
debug3: load_hostkeys: loaded 1 keys from tangserver
debug3: hostkeys_foreach: reading file "/root/.ssh/known_hosts"
debug3: record_hostkey: found key type RSA in file /root/.ssh/known_hosts:2
debug3: load_hostkeys: loaded 1 keys from XX.XX.XX.XX
debug1: Host 'tangserver' is known and matches the RSA host key.
debug1: Found key in /root/.ssh/known_hosts:1
debug3: send packet: type 21
debug2: set_newkeys: mode 1
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug3: receive packet: type 21
debug1: SSH2_MSG_NEWKEYS received
debug2: set_newkeys: mode 0
debug1: rekey after 134217728 blocks
debug2: key: /root/.ssh/id_rsa.home@tangserver ((nil)), explicit
debug3: send packet: type 5
debug3: receive packet: type 7
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<ssh-ed25519,ssh-rsa,rsa-
sha2-256,rsa-sha2-512,ssh-dss,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-
sha2-nistp521>
debug3: receive packet: type 6
debug2: service_accept: ssh-userauth
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug3: send packet: type 50
debug3: receive packet: type 51
debug1: Authentications that can continue: publickey,password
debug3: start over, passed a different list publickey,password
debug3: preferred gssapi-keyex,gssapi-with-mic,publickey,keyboard-
interactive,password
debug3: authmethod_lookup publickey
debug3: remaining preferred: keyboard-interactive,password
debug3: authmethod_is_enabled publickey
debug1: Next authentication method: publickey
debug1: Trying private key: /root/.ssh/id_rsa.home@tangserver
debug3: sign_and_send_pubkey: RSA
SHA256:PdJDwk+XebEnFBUOgLarVSEwcTHfypZ9nXx4b1BPOCE
debug3: sign_and_send_pubkey: signing using rsa-sha2-512
debug3: send packet: type 50
debug2: we sent a publickey packet, wait for reply
debug3: receive packet: type 51
debug1: Authentications that can continue: publickey,password
debug2: we did not send a packet, disable method
debug3: authmethod_lookup password
debug3: remaining preferred: ,password
debug3: authmethod_is_enabled password
debug1: Next authentication method: password
XXX@tangserver's password:
debug3: send packet: type 50
debug2: we sent a password packet, wait for reply
debug3: receive packet: type 52
debug1: Authentication succeeded (password).
Authenticated to tangserver ([XX.XX.XX.XX]:22).
debug1: Local connections to LOCALHOST:8080 forwarded to remote address
localhost:8080
debug3: channel_setup_fwd_listener_tcpip: type 2 wildcard 0 addr NULL
debug3: sock_set_v6only: set socket 4 IPV6_V6ONLY
debug1: Local forwarding listening on ::1 port 8080.
debug2: fd 4 setting O_NONBLOCK
debug3: fd 4 is O_NONBLOCK
debug1: channel 0: new [port listener]
debug1: Local forwarding listening on 127.0.0.1 port 8080.
debug2: fd 5 setting O_NONBLOCK
debug3: fd 5 is O_NONBLOCK
debug1: channel 1: new [port listener]
debug1: channel 2: new [client-session]
debug3: ssh_session2_open: channel_new: 2
debug2: channel 2: send open
debug3: send packet: type 90
debug1: Requesting no-more-sessions@openssh.com
debug3: send packet: type 80
debug1: Entering interactive session.
debug1: pledge: network
debug3: receive packet: type 80
debug1: client_input_global_request: rtype hostkeys-00@openssh.com want_reply 0
debug3: receive packet: type 91
debug2: channel_input_open_confirmation: channel 2: callback start
debug2: fd 3 setting TCP_NODELAY
debug3: ssh_packet_set_tos: set IP_TOS 0x48
debug2: client_session2_setup: id 2
debug2: channel 2: request pty-req confirm 1
debug3: send packet: type 98
debug1: Sending environment.
debug3: Ignored env TERM
debug3: Ignored env HOME
debug3: Ignored env SHELL
debug3: Ignored env USER
debug3: Ignored env LOGNAME
debug3: Ignored env PATH
debug1: Sending env LANG = en_US.UTF-8
debug2: channel 2: request env confirm 0
debug3: send packet: type 98
debug3: Ignored env LANGUAGE
debug3: Ignored env MAIL
debug3: Ignored env SHLVL
debug3: Ignored env PWD
debug3: Ignored env OLDPWD
debug3: Ignored env ZSH
debug3: Ignored env PAGER
debug3: Ignored env LESS
debug3: Ignored env LSCOLORS
debug3: Ignored env LS_COLORS
debug1: Sending env LC_CTYPE = en_US.UTF-8
debug2: channel 2: request env confirm 0
debug3: send packet: type 98
debug3: Ignored env _
debug2: channel 2: request shell confirm 1
debug3: send packet: type 98
debug2: channel_input_open_confirmation: channel 2: callback done
debug2: channel 2: open confirm rwindow 0 rmax 32768
debug3: send packet: type 1
packet_write_wait: Connection to XX.XX.XX.XX port 22: Broken pipe
-- System Information:
Debian Release: buster/sid
APT prefers testing
APT policy: (500, 'testing'), (500, 'stable')
Architecture: amd64 (x86_64)
Kernel: Linux 4.17.0-3-amd64 (SMP w/5 CPU cores)
Locale: LANG=en_US.utf8, LC_CTYPE=en_US.utf8 (charmap=UTF-8), LANGUAGE=en_US:en (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Versions of packages openssh-client depends on:
ii adduser 3.117
ii dpkg 1.19.0.5+b1
ii libc6 2.27-5
ii libedit2 3.1-20180525-1
ii libgssapi-krb5-2 1.16-2
ii libselinux1 2.8-1+b1
ii libssl1.0.2 1.0.2o-1
ii passwd 1:4.5-1.1
ii zlib1g 1:1.2.11.dfsg-1
Versions of packages openssh-client recommends:
ii xauth 1:1.0.10-1
Versions of packages openssh-client suggests:
pn keychain <none>
pn libpam-ssh <none>
pn monkeysphere <none>
pn ssh-askpass <none>
-- no debconf information
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