Re: [gentoo-hardened] SSH nolonger works after update

[brant williams]

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What kind of 'update' did you run?  Can you detail what you did before the 
change ocurred?

You might need to update sshd_config or /etc/init.d/sshd... weird, though.

brant williams
FCAA CDCA 20BC 3925 D634  F5C4 7420 6784 4DEB 6002



On Fri, 7 Mar 2008, Dan Reidy wrote:

> Date: Fri, 7 Mar 2008 14:06:11 -0500
> From: Dan Reidy <dubkat@×××××.com>
> Reply-To: gentoo-hardened@l.g.o
> To: gentoo-hardened@l.g.o
> Cc: "Reidy, Daniel" <dubkat@×××××.com>
> Subject: [gentoo-hardened] SSH nolonger works after update
>
> Hello Ladies and Gentlemen,
> Forgive me if this is an innapropriate topic for this list, but I figured
> it's full of people with know-how, and also the most active of the lists
> I'm subscribed to.
>
> The Scenerio:
> I have crappy bandwidth at home, so I use a headless, gentoo-hardened server
> at a family members house who travels alot and not using their bandwidth.
> After running an update yesterday, I can no longer login to the machine.
> Log pasted below. Before my family member left for a trip, I had them reboot
> the machine, but that didn't solve it... Nor could they login from the
> local network. I am completely at a loss as to how to fix this. Hooking up
> a monitor and keyboard is not an option.
>
> Any ideas?
>
> dubkat@synergy ~ $ ssh -vv HOST.SCRUBBED
> OpenSSH_4.7p1, OpenSSL 0.9.8g 19 Oct 2007
> debug1: Reading configuration data /home/dubkat/.ssh/config
> debug1: Applying options for *
> debug1: Reading configuration data /etc/ssh/ssh_config
> debug2: ssh_connect: needpriv 0
> debug1: Connecting to SCRUBBED [xx.xx.xx.xx] port 22.
> debug1: Connection established.
> debug1: identity file /home/dubkat/.ssh/identity type -1
> debug1: identity file /home/dubkat/.ssh/id_rsa type 1
> debug2: key_type_from_name: unknown key type '-----BEGIN'
> debug2: key_type_from_name: unknown key type '-----END'
> debug1: identity file /home/dubkat/.ssh/id_dsa type 2
> debug1: Remote protocol version 2.0, remote software version OpenSSH_4.7
> debug1: match: OpenSSH_4.7 pat OpenSSH*
> debug1: Enabling compatibility mode for protocol 2.0
> debug1: Local version string SSH-2.0-OpenSSH_4.7
> 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-g
> roup-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,arcfour,
> aes192-cbc,aes256-cbc
> debug2: kex_parse_kexinit:
> aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour,
> aes192-cbc,aes256-cbc
> debug2: kex_parse_kexinit:
> hmac-md5,hmac-sha1,umac-64@×××××××.com,hmac-ripemd160
> ,hmac-ripemd160@×××××××.com,hmac-sha1-96,hmac-md5-96
> debug2: kex_parse_kexinit:
> hmac-md5,hmac-sha1,umac-64@×××××××.com,hmac-ripemd160
> ,hmac-ripemd160@×××××××.com,hmac-sha1-96,hmac-md5-96
> debug2: kex_parse_kexinit: none,zlib@×××××××.com,zlib
> debug2: kex_parse_kexinit: none,zlib@×××××××.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-g
> roup-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,arcfour1
> 28,arcfour256,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@×××××××××××.se,aes128-c
> tr,aes192-ctr,aes256-ctr
> debug2: kex_parse_kexinit:
> aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour1
> 28,arcfour256,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@×××××××××××.se,aes128-c
> tr,aes192-ctr,aes256-ctr
> debug2: kex_parse_kexinit:
> hmac-md5,hmac-sha1,umac-64@×××××××.com,hmac-ripemd160
> ,hmac-ripemd160@×××××××.com,hmac-sha1-96,hmac-md5-96
> debug2: kex_parse_kexinit:
> hmac-md5,hmac-sha1,umac-64@×××××××.com,hmac-ripemd160
> ,hmac-ripemd160@×××××××.com,hmac-sha1-96,hmac-md5-96
> debug2: kex_parse_kexinit: none,zlib@×××××××.com
> debug2: kex_parse_kexinit: none,zlib@×××××××.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: 118/256
> debug2: bits set: 521/1024
> debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
> debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
> debug1: Host 'HOSTNAME.SCRUBBED' is known and matches the RSA host key.
> debug1: Found key in /home/dubkat/.ssh/known_hosts:19
> debug2: bits set: 523/1024
> 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/dubkat/.ssh/identity ((nil))
> debug2: key: /home/dubkat/.ssh/id_rsa (0x6656a0)
> debug2: key: /home/dubkat/.ssh/id_dsa (0x669db0)
>
>
>       *** WARNING ***       *** WARNING ***       *** WARNING ***
>
>                     THIS IS A PRIVATE MACHINE.
>                  NO UNAUTHORIZED ACCESS PERMITTED.
>           BRUTE FORCE ATTEMPTS WILL BE REPORTED TO YOUR ISP
>
>       *** WARNING ***       *** WARNING ***       *** WARNING ***
>
>
> debug1: Authentications that can continue: publickey,keyboard-interactive
> debug1: Next authentication method: publickey
> debug1: Trying private key: /home/dubkat/.ssh/identity
> debug1: Offering public key: /home/dubkat/.ssh/id_rsa
> debug2: we sent a publickey packet, wait for reply
> debug1: Authentications that can continue: publickey,keyboard-interactive
> debug1: Offering public key: /home/dubkat/.ssh/id_dsa
> debug2: we sent a publickey packet, wait for reply
> debug1: Authentications that can continue: publickey,keyboard-interactive
> debug2: we did not send a packet, disable method
> debug1: Next authentication method: keyboard-interactive
> debug2: userauth_kbdint
> debug2: we sent a keyboard-interactive packet, wait for reply
> debug1: Authentications that can continue: publickey,keyboard-interactive
> debug2: we did not send a packet, disable method
> debug1: No more authentication methods to try.
> Permission denied (publickey,keyboard-interactive).
>
>
>
> --
> -==========================================-
>
>    Avoid the Gates of Hell. Use Linux.
>      The choice of a GNU Generation.
>
>   Daniel J Reidy       RipeID:  DJR9-RIPE
>   dubkat@×××××.com    GPG Key: 0x36833401
>             http://sigterm.us/
>
> -==========================================-
>
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