On Wed, Mar 27, 2019 at 10:04 PM Damien Miller <djm@xxxxxxxxxxx> wrote: > > OpenSSH 8.0p1 is almost ready for release, so we would appreciate testing > on as many platforms and systems as possible. > > Snapshot releases for portable OpenSSH are available from > http://www.mindrot.org/openssh_snap/ Hi Damien, I pull today's snapshot from the link above onto an Ubuntu 18.04.2 and was able to successfully build and run the regression tests. I then tried to use the new ssh binary to connect to one of our production servers (which run OpenSSH_7.4p1) and observed an error connecting, after authentication appeared to succeed. $ ./ssh -p 4444 ec2-user@xxxxxxxxxxxxxxxxx.cloud client_loop: Broken pipe When I execute the same command with the built-in SSH (OpenSSH_7.6p1) it succeeds. If relevant, we use short-lived RSA certificates that are in our local SSH agent, and the private keys are not written to disk. Full verbose output below - I've changed the server names / IPs / port numbers a little but otherwise as is: $ ssh-add -L ssh-rsa AA...AN /home/me/.ssh/id_rsa ssh-rsa-cert-v01@xxxxxxxxxxx AAAAH...MJskQ== id_dtacld_shortlived_rsa $ ./ssh -vvv -p 4444 ec2-user@xxxxxxxxxxxxxxxxx.cloud OpenSSH_7.9p1-snap20190329, OpenSSL 1.1.0g 2 Nov 2017 debug2: resolving "our.server.in.the.cloud" port 4444 debug2: ssh_connect_direct debug1: Connecting to our.server.in.the.cloud [our.ip.in.the.cloud] port 4444. debug1: Connection established. debug1: identity file /home/me/.ssh/id_rsa type 0 debug1: identity file /home/me/.ssh/id_rsa-cert type -1 debug1: identity file /home/me/.ssh/id_dsa type -1 debug1: identity file /home/me/.ssh/id_dsa-cert type -1 debug1: identity file /home/me/.ssh/id_ecdsa type -1 debug1: identity file /home/me/.ssh/id_ecdsa-cert type -1 debug1: identity file /home/me/.ssh/id_ed25519 type -1 debug1: identity file /home/me/.ssh/id_ed25519-cert type -1 debug1: identity file /home/me/.ssh/id_xmss type -1 debug1: identity file /home/me/.ssh/id_xmss-cert type -1 debug1: Local version string SSH-2.0-OpenSSH_7.9 debug1: Remote protocol version 2.0, remote software version OpenSSH_7.4 debug1: match: OpenSSH_7.4 pat OpenSSH_7.0*,OpenSSH_7.1*,OpenSSH_7.2*,OpenSSH_7.3*,OpenSSH_7.4*,OpenSSH_7.5*,OpenSSH_7.6*,OpenSSH_7.7* compat 0x04000002 debug2: fd 3 setting O_NONBLOCK debug1: Authenticating to our.server.in.the.cloud:4444 as 'ec2-user' debug3: put_host_port: [our.server.in.the.cloud]:4444 debug3: hostkeys_foreach: reading file "/home/me/.ssh/known_hosts" 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@xxxxxxxxxx,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: ecdsa-sha2-nistp256-cert-v01@xxxxxxxxxxx,ecdsa-sha2-nistp384-cert-v01@xxxxxxxxxxx,ecdsa-sha2-nistp521-cert-v01@xxxxxxxxxxx,ssh-ed25519-cert-v01@xxxxxxxxxxx,rsa-sha2-512-cert-v01@xxxxxxxxxxx,rsa-sha2-256-cert-v01@xxxxxxxxxxx,ssh-rsa-cert-v01@xxxxxxxxxxx,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa debug2: ciphers ctos: chacha20-poly1305@xxxxxxxxxxx,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@xxxxxxxxxxx,aes256-gcm@xxxxxxxxxxx debug2: ciphers stoc: chacha20-poly1305@xxxxxxxxxxx,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@xxxxxxxxxxx,aes256-gcm@xxxxxxxxxxx debug2: MACs ctos: umac-64-etm@xxxxxxxxxxx,umac-128-etm@xxxxxxxxxxx,hmac-sha2-256-etm@xxxxxxxxxxx,hmac-sha2-512-etm@xxxxxxxxxxx,hmac-sha1-etm@xxxxxxxxxxx,umac-64@xxxxxxxxxxx,umac-128@xxxxxxxxxxx,hmac-sha2-256,hmac-sha2-512,hmac-sha1 debug2: MACs stoc: umac-64-etm@xxxxxxxxxxx,umac-128-etm@xxxxxxxxxxx,hmac-sha2-256-etm@xxxxxxxxxxx,hmac-sha2-512-etm@xxxxxxxxxxx,hmac-sha1-etm@xxxxxxxxxxx,umac-64@xxxxxxxxxxx,umac-128@xxxxxxxxxxx,hmac-sha2-256,hmac-sha2-512,hmac-sha1 debug2: compression ctos: none,zlib@xxxxxxxxxxx,zlib debug2: compression stoc: none,zlib@xxxxxxxxxxx,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@xxxxxxxxxx,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1 debug2: host key algorithms: ssh-rsa,rsa-sha2-512,rsa-sha2-256,ecdsa-sha2-nistp256,ecdsa-sha2-nistp256-cert-v01@xxxxxxxxxxx,ssh-ed25519 debug2: ciphers ctos: chacha20-poly1305@xxxxxxxxxxx,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@xxxxxxxxxxx,aes256-gcm@xxxxxxxxxxx,aes128-cbc,aes192-cbc,aes256-cbc,blowfish-cbc,cast128-cbc,3des-cbc debug2: ciphers stoc: chacha20-poly1305@xxxxxxxxxxx,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@xxxxxxxxxxx,aes256-gcm@xxxxxxxxxxx,aes128-cbc,aes192-cbc,aes256-cbc,blowfish-cbc,cast128-cbc,3des-cbc debug2: MACs ctos: umac-64-etm@xxxxxxxxxxx,umac-128-etm@xxxxxxxxxxx,hmac-sha2-256-etm@xxxxxxxxxxx,hmac-sha2-512-etm@xxxxxxxxxxx,hmac-sha1-etm@xxxxxxxxxxx,umac-64@xxxxxxxxxxx,umac-128@xxxxxxxxxxx,hmac-sha2-256,hmac-sha2-512,hmac-sha1 debug2: MACs stoc: umac-64-etm@xxxxxxxxxxx,umac-128-etm@xxxxxxxxxxx,hmac-sha2-256-etm@xxxxxxxxxxx,hmac-sha2-512-etm@xxxxxxxxxxx,hmac-sha1-etm@xxxxxxxxxxx,umac-64@xxxxxxxxxxx,umac-128@xxxxxxxxxxx,hmac-sha2-256,hmac-sha2-512,hmac-sha1 debug2: compression ctos: none,zlib@xxxxxxxxxxx debug2: compression stoc: none,zlib@xxxxxxxxxxx debug2: languages ctos: debug2: languages stoc: debug2: first_kex_follows 0 debug2: reserved 0 debug1: kex: algorithm: curve25519-sha256 debug1: kex: host key algorithm: ecdsa-sha2-nistp256-cert-v01@xxxxxxxxxxx debug1: kex: server->client cipher: chacha20-poly1305@xxxxxxxxxxx MAC: <implicit> compression: none debug1: kex: client->server cipher: chacha20-poly1305@xxxxxxxxxxx MAC: <implicit> compression: none debug3: send packet: type 30 debug1: expecting SSH2_MSG_KEX_ECDH_REPLY debug3: receive packet: type 31 debug1: Server host certificate: ecdsa-sha2-nistp256-cert-v01@xxxxxxxxxxx SHA256:AH8vtFSfhKUE41ankmoB/tpo9Duxe7ZHA5S1sja36Fk, serial 0 ID "our.server.in.the.cloud" CA ssh-rsa SHA256:QtxnpSvhjow+Z68+z5VMnNGitHHc+nkoDMiJM0C+JtM valid from 2019-03-29T11:00:01 to 2019-03-30T11:00:01 debug2: Server host certificate hostname: our.server.in.the.cloud debug3: put_host_port: [our.ip.in.the.cloud]:4444 debug3: put_host_port: [our.server.in.the.cloud]:4444 debug3: hostkeys_foreach: reading file "/home/me/.ssh/known_hosts" debug1: checking without port identifier debug3: hostkeys_foreach: reading file "/home/me/.ssh/known_hosts" debug3: record_hostkey: found ca key type RSA in file /home/me/.ssh/known_hosts:11 debug3: load_hostkeys: loaded 1 keys from our.server.in.the.cloud debug1: Host 'our.server.in.the.cloud' is known and matches the ECDSA-CERT host certificate. debug1: Found CA key in /home/me/.ssh/known_hosts:11 debug1: found matching key w/out port debug3: send packet: type 21 debug2: set_newkeys: mode 1 debug1: rekey out 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 in after 134217728 blocks debug1: Will attempt key: /home/me/.ssh/id_rsa RSA SHA256:jFWK2zuc3SuLroIcpk/awobdgD43pu0G9iWtst1lLzg agent debug1: Will attempt key: id_dtacld_shortlived_rsa RSA-CERT SHA256:AeEypypDIQ7DXiFtXfpEGmNZHHSpDoD9Hppg+YzU+O0 agent debug1: Will attempt key: /home/me/.ssh/id_dsa debug1: Will attempt key: /home/me/.ssh/id_ecdsa debug1: Will attempt key: /home/me/.ssh/id_ed25519 debug1: Will attempt key: /home/me/.ssh/id_xmss debug2: pubkey_prepare: done debug3: send packet: type 5 debug3: receive packet: type 7 debug1: SSH2_MSG_EXT_INFO received debug1: kex_input_ext_info: server-sig-algs=<rsa-sha2-256,rsa-sha2-512> 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 debug3: start over, passed a different list publickey debug3: preferred 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: Offering public key: /home/me/.ssh/id_rsa RSA SHA256:jFWK2zuc3SuLroIcpk/awobdgD43pu0G9iWtst1lLzg agent 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 debug1: Offering public key: id_dtacld_shortlived_rsa RSA-CERT SHA256:AeEypypDIQ7DXiFtXfpEGmNZHHSpDoD9Hppg+YzU+O0 agent debug3: send packet: type 50 debug2: we sent a publickey packet, wait for reply debug3: receive packet: type 60 debug1: Server accepts key: id_dtacld_shortlived_rsa RSA-CERT SHA256:AeEypypDIQ7DXiFtXfpEGmNZHHSpDoD9Hppg+YzU+O0 agent debug3: sign_and_send_pubkey: RSA-CERT SHA256:AeEypypDIQ7DXiFtXfpEGmNZHHSpDoD9Hppg+YzU+O0 debug1: sign_and_send_pubkey: no separate private key for certificate "id_dtacld_shortlived_rsa" debug3: sign_and_send_pubkey: signing using ssh-rsa-cert-v01@xxxxxxxxxxx debug3: send packet: type 50 debug3: receive packet: type 52 debug1: Authentication succeeded (publickey). Authenticated to our.server.in.the.cloud ([our.ip.in.the.cloud]:4444). debug1: channel 0: new [client-session] debug3: ssh_session2_open: channel_new: 0 debug2: channel 0: send open debug3: send packet: type 90 debug1: Requesting no-more-sessions@xxxxxxxxxxx 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@xxxxxxxxxxx want_reply 0 debug3: receive packet: type 91 debug2: channel_input_open_confirmation: channel 0: callback start debug2: fd 3 setting TCP_NODELAY debug3: ssh_packet_set_tos: set IP_TOS 0x48 debug2: client_session2_setup: id 0 debug2: channel 0: request pty-req confirm 1 debug3: send packet: type 98 debug2: channel 0: request shell confirm 1 debug3: send packet: type 98 debug2: channel_input_open_confirmation: channel 0: callback done debug2: channel 0: open confirm rwindow 0 rmax 32768 debug3: send packet: type 1 client_loop: Broken pipe _______________________________________________ openssh-unix-dev mailing list openssh-unix-dev@xxxxxxxxxxx https://lists.mindrot.org/mailman/listinfo/openssh-unix-dev
