Bug#428968: openssh-server: password based authentication not working following upgrade

> After upgrading to 1:4.6p1-1 from 1:4.3p2-11, I can no longer login to my
> machine using password-based authentication. I've experienced this on two
> different machines now, leading me to file this report.

Hmm. I can't reproduce this here. Could you stop sshd, run 'sshd -ddd'
(you'll then need to restart sshd afterwards), and try to connect using
'ssh -vvv'? Then send me both verbose logs.

debug2: load_server_config: filename /etc/ssh/sshd_config debug2: load_server_config: done config len = 637 debug2: parse_server_config: config /etc/ssh/sshd_config len 637 debug3: /etc/ssh/sshd_config:5 setting Port 22 debug3: /etc/ssh/sshd_config:9 setting Protocol 2 debug3: /etc/ssh/sshd_config:11 setting HostKey /etc/ssh/ssh_host_rsa_key debug3: /etc/ssh/sshd_config:12 setting HostKey /etc/ssh/ssh_host_dsa_key debug3: /etc/ssh/sshd_config:14 setting UsePrivilegeSeparation yes debug3: /etc/ssh/sshd_config:17 setting KeyRegenerationInterval 3600 debug3: /etc/ssh/sshd_config:18 setting ServerKeyBits 768 debug3: /etc/ssh/sshd_config:21 setting SyslogFacility AUTH debug3: /etc/ssh/sshd_config:22 setting LogLevel INFO debug3: /etc/ssh/sshd_config:25 setting LoginGraceTime 600 debug3: /etc/ssh/sshd_config:26 setting PermitRootLogin yes debug3: /etc/ssh/sshd_config:27 setting StrictModes yes debug3: /etc/ssh/sshd_config:29 setting RSAAuthentication yes debug3: /etc/ssh/sshd_config:30 setting PubkeyAuthentication yes debug3: /etc/ssh/sshd_config:34 setting IgnoreRhosts yes debug3: /etc/ssh/sshd_config:36 setting RhostsRSAAuthentication no debug3: /etc/ssh/sshd_config:38 setting HostbasedAuthentication no debug3: /etc/ssh/sshd_config:43 setting PermitEmptyPasswords no debug3: /etc/ssh/sshd_config:46 setting ChallengeResponseAuthentication no debug3: /etc/ssh/sshd_config:49 setting PasswordAuthentication no debug3: /etc/ssh/sshd_config:61 setting X11Forwarding yes debug3: /etc/ssh/sshd_config:62 setting X11DisplayOffset 10 debug3: /etc/ssh/sshd_config:63 setting PrintMotd no debug3: /etc/ssh/sshd_config:64 setting PrintLastLog yes debug3: /etc/ssh/sshd_config:65 setting KeepAlive yes debug3: /etc/ssh/sshd_config:71 setting Subsystem sftp /usr/lib/openssh/sftp-server debug3: /etc/ssh/sshd_config:73 setting UsePAM yes debug1: sshd version OpenSSH_4.6p1 Debian-1 debug3: Not a RSA1 key file /etc/ssh/ssh_host_rsa_key. debug1: read PEM private key done: type RSA debug1: private host key: #0 type 1 RSA debug3: Not a RSA1 key file /etc/ssh/ssh_host_dsa_key. debug1: read PEM private key done: type DSA debug1: private host key: #1 type 2 DSA debug1: rexec_argv[0]='/usr/sbin/sshd' debug1: rexec_argv[1]='-ddd' debug2: fd 3 setting O_NONBLOCK debug1: Bind to port 22 on ::. Server listening on :: port 22. debug2: fd 4 setting O_NONBLOCK debug1: Bind to port 22 on 0.0.0.0. Bind to port 22 on 0.0.0.0 failed: Address already in use. debug3: fd 4 is not O_NONBLOCK debug1: Server will not fork when running in debugging mode. debug3: send_rexec_state: entering fd = 7 config len 637 debug3: ssh_msg_send: type 0 debug3: send_rexec_state: done debug1: rexec start in 4 out 4 newsock 4 pipe -1 sock 7 debug1: inetd sockets after dupping: 3, 3 debug3: Normalising mapped IPv4 in IPv6 address debug3: Normalising mapped IPv4 in IPv6 address Connection from 127.0.0.1 port 36711 debug1: Client protocol version 2.0; client software version OpenSSH_4.6p1 Debian-1 debug1: match: OpenSSH_4.6p1 Debian-1 pat OpenSSH* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_4.6p1 Debian-1 debug2: fd 3 setting O_NONBLOCK debug3: privsep user:group 100:65534 debug1: permanently_set_uid: 100/65534 debug1: list_hostkey_types: ssh-rsa,ssh-dss debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1 debug2: kex_parse_kexinit: ssh-rsa,ssh-dss debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: none,zlib@openssh.com debug2: kex_parse_kexinit: none,zlib@openssh.com debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: first_kex_follows 0 debug2: kex_parse_kexinit: reserved 0 debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1 debug2: kex_parse_kexinit: ssh-rsa,ssh-dss debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: none,zlib@openssh.com,zlib debug2: kex_parse_kexinit: none,zlib@openssh.com,zlib debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: first_kex_follows 0 debug2: kex_parse_kexinit: reserved 0 debug2: mac_init: found hmac-md5 debug1: kex: client->server aes128-cbc hmac-md5 none debug2: mac_init: found hmac-md5 debug1: kex: server->client aes128-cbc hmac-md5 none debug2: Network child is on pid 29573 debug3: preauth child monitor started debug3: mm_request_receive entering debug1: SSH2_MSG_KEX_DH_GEX_REQUEST received debug3: mm_request_send entering: type 0 debug3: mm_choose_dh: waiting for MONITOR_ANS_MODULI debug3: mm_request_receive_expect entering: type 1 debug3: mm_request_receive entering debug3: mm_request_send entering: type 1 debug2: monitor_read: 0 used once, disabling now debug3: mm_choose_dh: remaining 0 debug1: SSH2_MSG_KEX_DH_GEX_GROUP sent debug2: dh_gen_key: priv key bits set: 124/256 debug2: bits set: 503/1024 debug1: expecting SSH2_MSG_KEX_DH_GEX_INIT debug2: bits set: 514/1024 debug3: mm_key_sign entering debug3: mm_request_send entering: type 5 debug3: mm_key_sign: waiting for MONITOR_ANS_SIGN debug3: mm_request_receive_expect enteringdebug3: mm_answer_sign debug3: mm_request_receive entering debug3: mm_answer_sign: signature 0x80064688(143) debug3: mm_request_send entering: type 6 debug2: monitor_read: 5 used once, disabling now debug3: mm_request_receive entering debug2: kex_derive_keys debug2: set_newkeys: mode 1 debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug2: set_newkeys: mode 0 debug1: SSH2_MSG_NEWKEYS received debug1: KEX done debug1: userauth-request for user adar service ssh-connection method none debug1: attempt 0 failures 0 debug3: mm_getpwnamallow entering debug3: mm_request_send entering: type 7 debug3: mm_getpwnamallow: waiting for MONITOR_ANS_PWNAM debug3: mm_request_receive_expect entering: type 8 debug3: mm_request_receive entering debug3: monitor_read: checking request 7 debug3: mm_answer_pwnamallow debug3: Normalising mapped IPv4 in IPv6 address debug3: Trying to reverse map address 127.0.0.1. debug2: parse_server_config: config reprocess config len 637 debug3: mm_answer_pwnamallow: sending MONITOR_ANS_PWNAM: 1 debug3: mm_request_send entering: type 8 debug2: monitor_read: 7 used once, disabling now debug3: mm_request_receive entering debug2: input_userauth_request: setting up authctxt for adar debug3: mm_start_pam entering debug3: mm_request_send entering: type 48 debug3: monitor_read: checking request 48 debug1: PAM: initializing for "adar" debug2: input_userauth_request: try method none debug1: userauth-request for user adar service ssh-connection method publickey debug1: attempt 1 failures 1 debug2: input_userauth_request: try method publickey debug1: test whether pkalg/pkblob are acceptable debug3: mm_key_allowed entering debug3: mm_request_send entering: type 21 debug3: mm_key_allowed: waiting for MONITOR_ANS_KEYALLOWED debug3: mm_request_receive_expect entering: type 22 debug3: mm_request_receive entering debug1: PAM: setting PAM_RHOST to "localhost" debug1: PAM: setting PAM_TTY to "ssh" debug2: monitor_read: 48 used once, disabling now debug3: mm_request_receive entering debug3: monitor_read: checking request 3 debug3: mm_answer_authserv: service=ssh-connection, style=, role= debug2: monitor_read: 3 used once, disabling now debug3: mm_request_receive entering debug3: monitor_read: checking request 21 debug3: mm_answer_keyallowed entering debug3: mm_answer_keyallowed: key_from_blob: 0x80066300 debug1: temporarily_use_uid: 5698/201 (e=0/0) debug1: trying public key file /home/adar/.ssh/authorized_keys debug1: restore_uid: 0/0 debug1: temporarily_use_uid: 5698/201 (e=0/0) debug1: trying public key file /home/adar/.ssh/authorized_keys2 debug1: restore_uid: 0/0 Failed publickey for adar from 127.0.0.1 port 36711 ssh2 debug3: mm_answer_keyallowed: key 0x80066300 is disallowed debug3: mm_request_send entering: type 22 debug3: mm_request_receive entering debug2: userauth_pubkey: authenticated 0 pkalg ssh-rsa Connection closed by 127.0.0.1 debug1: do_cleanup debug1: do_cleanup

OpenSSH_4.6p1 Debian-1, OpenSSL 0.9.8e 23 Feb 2007 debug1: Reading configuration data /etc/ssh/ssh_config debug1: Applying options for * debug2: ssh_connect: needpriv 0 debug1: Connecting to localhost [127.0.0.1] port 22. debug1: Connection established. debug1: identity file /home/adar/.ssh/identity type -1 debug3: Not a RSA1 key file /home/adar/.ssh/id_rsa. debug2: key_type_from_name: unknown key type '-----BEGIN' debug3: key_read: missing keytype debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug3: key_read: missing whitespace debug2: key_type_from_name: unknown key type '-----END' debug3: key_read: missing keytype debug1: identity file /home/adar/.ssh/id_rsa type 1 debug1: identity file /home/adar/.ssh/id_dsa type -1 debug1: Remote protocol version 2.0, remote software version OpenSSH_4.6p1 Debian-1 debug1: match: OpenSSH_4.6p1 Debian-1 pat OpenSSH* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_4.6p1 Debian-1 debug2: fd 3 setting O_NONBLOCK debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1 debug2: kex_parse_kexinit: ssh-rsa,ssh-dss debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: none,zlib@openssh.com,zlib debug2: kex_parse_kexinit: none,zlib@openssh.com,zlib debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: first_kex_follows 0 debug2: kex_parse_kexinit: reserved 0 debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1 debug2: kex_parse_kexinit: ssh-rsa,ssh-dss debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: none,zlib@openssh.com debug2: kex_parse_kexinit: none,zlib@openssh.com debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: first_kex_follows 0 debug2: kex_parse_kexinit: reserved 0 debug2: mac_init: found hmac-md5 debug1: kex: server->client aes128-cbc hmac-md5 none debug2: mac_init: found hmac-md5 debug1: kex: client->server aes128-cbc hmac-md5 none debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP debug2: dh_gen_key: priv key bits set: 119/256 debug2: bits set: 514/1024 debug1: SSH2_MSG_KEX_DH_GEX_INIT sent debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY debug3: check_host_in_hostfile: filename /home/adar/.ssh/known_hosts debug3: check_host_in_hostfile: match line 21 debug1: Host 'localhost' is known and matches the RSA host key. debug1: Found key in /home/adar/.ssh/known_hosts:21 debug2: bits set: 503/1024 debug1: ssh_rsa_verify: signature correct debug2: kex_derive_keys debug2: set_newkeys: mode 1 debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug2: set_newkeys: mode 0 debug1: SSH2_MSG_NEWKEYS received debug1: SSH2_MSG_SERVICE_REQUEST sent debug2: service_accept: ssh-userauth debug1: SSH2_MSG_SERVICE_ACCEPT received debug2: key: /home/adar/.ssh/identity ((nil)) debug2: key: /home/adar/.ssh/id_rsa (0x800560b0) debug2: key: /home/adar/.ssh/id_dsa ((nil)) debug1: Authentications that can continue: publickey debug3: start over, passed a different list publickey debug3: preferred gssapi-keyex,gssapi-with-mic,gssapi,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: /home/adar/.ssh/identity debug3: no such identity: /home/adar/.ssh/identity debug1: Offering public key: /home/adar/.ssh/id_rsa debug3: send_pubkey_test debug2: we sent a publickey packet, wait for reply debug1: Authentications that can continue: publickey debug1: Trying private key: /home/adar/.ssh/id_dsa debug3: no such identity: /home/adar/.ssh/id_dsa debug2: we did not send a packet, disable method debug1: No more authentication methods to try. Permission denied (publickey).

Reply to: