Bug#296811: ssh: SSH hangs right after successful login
Package: ssh
Version: 1:3.8.1p1-8.sarge.4
Severity: normal
SSH hangs right after a successful login, be it with password or with
authentication keys.
The very same behaviour occurs when I use ssh as a client from this PC,
and when I try to connect to this PC from another client.
Here is an example session:
===================================================
pupilla:~$ ssh -v -v -v mardy@subversions.gnu.org
OpenSSH_3.8.1p1 Debian-8.sarge.4, OpenSSL 0.9.7e 25 Oct 2004
debug1: Reading configuration data /home/mardy/.ssh/config
debug1: Reading configuration data /etc/ssh/ssh_config
debug2: ssh_connect: needpriv 0
debug1: Connecting to subversions.gnu.org [199.232.41.3] port 22.
debug1: Connection established.
debug1: identity file /home/mardy/.ssh/id_rsa type -1
debug3: Not a RSA1 key file /home/mardy/.ssh/id_dsa.
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
debug2: key_type_from_name: unknown key type '-----END'
debug3: key_read: missing keytype
debug1: identity file /home/mardy/.ssh/id_dsa type 2
debug1: Remote protocol version 2.0, remote software version OpenSSH_3.4p1 Debian 1:3.4p1-1.woody.3.1
debug1: match: OpenSSH_3.4p1 Debian 1:3.4p1-1.woody.3.1 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_3.8.1p1 Debian-8.sarge.4
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug2: kex_parse_kexinit: diffie-hellman-group-exchange-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,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,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: zlib,none
debug2: kex_parse_kexinit: zlib,none
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-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,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se
debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se
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
debug2: kex_parse_kexinit: none,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: server->client aes128-cbc hmac-md5 zlib
debug2: mac_init: found hmac-md5
debug1: kex: client->server aes128-cbc hmac-md5 zlib
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: 138/256
debug2: bits set: 499/1024
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug3: check_host_in_hostfile: filename /home/mardy/.ssh/known_hosts
debug2: key_type_from_name: unknown key type '1024'
debug3: key_read: missing keytype
debug3: check_host_in_hostfile: match line 13
debug3: check_host_in_hostfile: filename /home/mardy/.ssh/known_hosts
debug3: check_host_in_hostfile: match line 13
debug1: Host 'subversions.gnu.org' is known and matches the RSA host key.
debug1: Found key in /home/mardy/.ssh/known_hosts:13
debug2: bits set: 507/1024
debug1: ssh_rsa_verify: signature correct
debug2: kex_derive_keys
debug2: set_newkeys: mode 1
debug1: Enabling compression at level 6.
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/mardy/.ssh/id_rsa ((nil))
debug2: key: /home/mardy/.ssh/id_dsa (0x808c070)
debug1: Authentications that can continue: publickey,password,keyboard-interactive
debug3: start over, passed a different list publickey,password,keyboard-interactive
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: Trying private key: /home/mardy/.ssh/id_rsa
debug3: no such identity: /home/mardy/.ssh/id_rsa
debug1: Offering public key: /home/mardy/.ssh/id_dsa
debug3: send_pubkey_test
debug2: we sent a publickey packet, wait for reply
debug1: Server accepts key: pkalg ssh-dss blen 433
debug2: input_userauth_pk_ok: fp 60:a9:0c:41:cf:49:03:41:cf:e9:e2:00:54:5d:59:0e
debug3: sign_and_send_pubkey
debug1: read PEM private key done: type DSA
debug1: Authentication succeeded (publickey).
debug2: fd 6 setting O_NONBLOCK
debug1: channel 0: new [client-session]
debug3: ssh_session2_open: channel_new: 0
debug2: channel 0: send open
debug1: Entering interactive session.
debug2: callback start
debug2: ssh_session2_setup: id 0
debug2: channel 0: request shell
debug2: callback done
debug2: channel 0: open confirm rwindow 0 rmax 32768
===================================================
I've done some research with google, and it looks like several other
people had this problem; yet, I couldn't find any answers.
-- System Information:
Debian Release: 3.1
APT prefers unstable
APT policy: (500, 'unstable'), (500, 'testing'), (1, 'experimental')
Architecture: i386 (i686)
Kernel: Linux 2.6.9
Locale: LANG=it_IT.UTF-8@euro, LC_CTYPE=it_IT.UTF-8@euro (charmap=UTF-8)
Versions of packages ssh depends on:
ii adduser 3.62 Add and remove users and groups
ii debconf 1.4.45 Debian configuration management sy
ii dpkg 1.10.27 Package maintenance system for Deb
ii libc6 2.3.2.ds1-20 GNU C Library: Shared libraries an
ii libpam-modules 0.76-22 Pluggable Authentication Modules f
ii libpam-runtime 0.76-22 Runtime support for the PAM librar
ii libpam0g 0.76-22 Pluggable Authentication Modules l
ii libssl0.9.7 0.9.7e-3 SSL shared libraries
ii libwrap0 7.6.dbs-6 Wietse Venema's TCP wrappers libra
ii zlib1g 1:1.2.2-4 compression library - runtime
-- debconf information:
ssh/insecure_rshd:
ssh/privsep_ask: true
* ssh/user_environment_tell:
* ssh/forward_warning:
ssh/insecure_telnetd:
ssh/new_config: true
* ssh/use_old_init_script: true
* ssh/SUID_client: false
ssh/disable_cr_auth: false
* ssh/privsep_tell:
ssh/ssh2_keys_merged:
* ssh/protocol2_only: true
ssh/encrypted_host_key_but_no_keygen:
* ssh/run_sshd: false
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