Public bug reported:
Binary package hint: openssh-client
After upgrading from 8.04 to 8.10, I could not log into any machines via
ssh where I had already configured public-key auth. This happens with
both rsa and dsa keys.
The error given was:
"Received disconnect from 10.0.0.1: 2: Too many authentication failures for
<USER>"
`ssh -vvv <hostname>` showed that ssh client was trying keys
randomly(?), even though ~/.ssh/config specified the key properly (and
has always worked in the past).
workaround 1: If I remove all the keys from ~/.ssh/ except for the host I was
trying, I could then log into that host successfully while in X11.
workaround 2: use ssh client directly from the console (with or without X11
running on anther vty)
$ apt-cache policy openssh-client
openssh-client:
Installed: 1:5.1p1-3ubuntu1
Script started on Wed 17 Dec 2008 03:24:11 PM EST
[nd...@ganymede] [jobs:0] [exit:0] [cpu:44C] [15:24] [12/17/08] [~]
$ ssh -vvv io
OpenSSH_5.1p1 Debian-3ubuntu1, OpenSSL 0.9.8g 19 Oct 2007
debug1: Reading configuration data /home/ndain/.ssh/config
debug1: Applying options for io
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug2: ssh_connect: needpriv 0
debug1: Connecting to io.jovian.local [10.0.0.1] port 22.
debug1: Connection established.
debug3: Not a RSA1 key file /home/ndain/.ssh/id_dsa-nd...@mynetworks.priv.
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
debug2: key_type_from_name: unknown key type '-----END'
debug3: key_read: missing keytype
debug1: identity file /home/ndain/.ssh/id_dsa-nd...@mynetworks.priv type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_4.7p1
Debian-8ubuntu1.2
debug1: match: OpenSSH_4.7p1 Debian-8ubuntu1.2 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.1p1 Debian-3ubuntu1
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-...@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-...@lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr
debug2: kex_parse_kexinit:
hmac-md5,hmac-sha1,umac...@openssh.com,hmac-ripemd160,hmac-ripemd...@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit:
hmac-md5,hmac-sha1,umac...@openssh.com,hmac-ripemd160,hmac-ripemd...@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,z...@openssh.com,zlib
debug2: kex_parse_kexinit: none,z...@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-...@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-...@lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr
debug2: kex_parse_kexinit:
hmac-md5,hmac-sha1,umac...@openssh.com,hmac-ripemd160,hmac-ripemd...@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit:
hmac-md5,hmac-sha1,umac...@openssh.com,hmac-ripemd160,hmac-ripemd...@openssh.com,hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,z...@openssh.com
debug2: kex_parse_kexinit: none,z...@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_setup: found hmac-md5
debug1: kex: server->client aes128-cbc hmac-md5 none
debug2: mac_setup: 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: 125/256
debug2: bits set: 512/1024
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug3: check_host_in_hostfile: filename /home/ndain/.ssh/known_hosts
debug3: check_host_in_hostfile: match line 21
debug1: Host 'io.jovian.local' is known and matches the RSA host key.
debug1: Found key in /home/ndain/.ssh/known_hosts:21
debug2: bits set: 482/1024
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
## this line is repeated once for every key (host0,host1,host2...):
debug2: key: id_dsa-u...@host0.priv (0x7fe0c1d22a70)
## (excess snipped)
debug2: key: /home/ndain/.ssh/id_dsa-nd...@mynetworks.priv ((nil))
debug1: Authentications that can continue: publickey,password
debug3: start over, passed a different list publickey,password
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
## here's where things get wonky:
debug1: Offering public key: id_dsa-u...@host0.priv
debug3: send_pubkey_test
debug2: we sent a publickey packet, wait for reply
debug1: Authentications that can continue: publickey,password
debug1: Offering public key: id_dsa-u...@host1.priv
debug3: send_pubkey_test
debug2: we sent a publickey packet, wait for reply
debug1: Authentications that can continue: publickey,password
debug1: Offering public key: id_dsa-u...@host2.priv
debug3: send_pubkey_test
## (excess snipped)
## ssh keeps trying all the wrong keys until the server boots us:
Received disconnect from 10.0.0.1: 2: Too many authentication failures for ndain
[nd...@ganymede] [jobs:0] [exit:255] [cpu:44C] [15:24] [12/17/08] [~]
$ exit
Script done on Wed 17 Dec 2008 03:24:19 PM EST
** Affects: openssh (Ubuntu)
Importance: Undecided
Status: New
--
openssh public key auth broken if one has many keys but only in X11
https://bugs.launchpad.net/bugs/309160
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