1.7.7: after upgrade lost ability to login via ssh

[Gerry Reno <greno at verizon dot net>]

Something else I just discovered after upgrading to 1.7.7 is that I now
have lost the ability to login via ssh.

I have OpenSSH installed and running sshd as a service.  Both password
and keys accepted.  But now neither means will work.

    # ssh -i keypair1.pem   Administrator@MACHINE_IP
    Last login: Fri Feb  4 17:19:26 2011 from LOCAL_CLIENT_MACHINE
    Connection to MACHINE_IP closed.


So I increased verbosity but did not see anything obvious.


    # ssh -v -i keypair1.pem   Administrator@MACHINE_IP
    OpenSSH_5.2p1, OpenSSL 0.9.8k-fips 25 Mar 2009
    debug1: Reading configuration data /etc/ssh/ssh_config
    debug1: Applying options for *
    debug1: Connecting to MACHINE_IP [MACHINE_IP] port 22.
    debug1: Connection established.
    debug1: permanently_set_uid: 0/0
    debug1: identity file keypair1.pem type -1
    debug1: Remote protocol version 2.0, remote software version OpenSSH_5.8
    debug1: match: OpenSSH_5.8 pat OpenSSH*
    debug1: Enabling compatibility mode for protocol 2.0
    debug1: Local version string SSH-2.0-OpenSSH_5.2
    debug1: SSH2_MSG_KEXINIT sent
    debug1: SSH2_MSG_KEXINIT received
    debug1: kex: server->client aes128-ctr hmac-md5 none
    debug1: kex: client->server aes128-ctr hmac-md5 none
    debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
    debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
    debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
    debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
    debug1: Host 'MACHINE_IP' is known and matches the RSA host key.
    debug1: Found key in /root/.ssh/known_hosts:49
    debug1: ssh_rsa_verify: signature correct
    debug1: SSH2_MSG_NEWKEYS sent
    debug1: expecting SSH2_MSG_NEWKEYS
    debug1: SSH2_MSG_NEWKEYS received
    debug1: SSH2_MSG_SERVICE_REQUEST sent
    debug1: SSH2_MSG_SERVICE_ACCEPT received
    debug1: Authentications that can continue:
    publickey,password,keyboard-interactive
    debug1: Next authentication method: publickey
    debug1: Trying private key: keypair1.pem
    debug1: read PEM private key done: type RSA
    debug1: Authentication succeeded (publickey).
    debug1: channel 0: new [client-session]
    debug1: Requesting no-more-sessions@openssh.com
    debug1: Entering interactive session.
    debug1: Sending environment.
    debug1: Sending env LANG = en_US.UTF-8
    Last login: Tue Feb  8 11:18:47 2011 from LOCAL_CLIENT_MACHINE
    debug1: client_input_channel_req: channel 0 rtype exit-status reply 0
    debug1: client_input_channel_req: channel 0 rtype eow@openssh.com
    reply 0
    debug1: channel 0: free: client-session, nchannels 1
    Connection to MACHINE_IP closed.
    Transferred: sent 2224, received 2144 bytes, in 2.9 seconds
    Bytes per second: sent 764.9, received 737.4
    debug1: Exit status 0


The session looks like its connected ok but then it immediately
disconnects. 

Anyone else seen this on upgrade or have an idea how to fix this?



Regards,
Gerry




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