• Ssh Packet Type 96
• Ssh Packet Type 60
• Ssh Packet Type 51

Debug3: receive packet: type 6 debug2: serviceaccept: ssh-userauth debug1: SSH2MSGSERVICEACCEPT received debug3: send packet: type 50 debug3: receive packet: type 51 debug1: Authentications that can continue: publickey,password debug3: start over, passed a different list publickey,password. From here your computer will receive an IP address from the Packet Squirrel in the 172.16.32.x range, and you’ll be able to ssh in as root to 172.16.32.1. The default password is hak5squirrel. You’ll find the default payloads from /root/payloads in their corresponding switch folders. This status LED will light to indicate various states. The SSH client sends a packet to the server and hangs for 10 seconds (send packet: type 50) The server response arrives and everything proceeds normally (receive packet: type 51) So, we are waiting for 10 seconds for the server to get back to us with some kind of response (after successfully establishing a TCP connection).

• Status:Resolved
• Resolution: Fixed
• Fix Version/s:2.2.0
• Labels:
• Environment:

  AIX 7.2 openssh client attempting connection to Bitbucket 5.16.0 containing Mina 2.0.19

There is a potential bug in Mina in handling a custom SSH packet type 106. 'Unassigned' according to https://www.iana.org/assignments/ssh-parameters/ssh-parameters.xhtml

My scenario is attempting to git clone from the ssh server inside Bitbucket 5.16.0, which is Mina 2.0.19.

On Linux if I set:

export GIT_SSH_COMMAND='ssh -vvv'

Then I get this log fragment from my git clone failing:

Ssh Packet Type 96

debug1: Host '[bitbucketdev]:7999' is known and matches the RSA host key.
debug1: Found key in /home/<...>/.ssh/known_hosts:1
debug3: send packet: type 21
debug2: set_newkeys: mode 1
debug1: rekey after 4294967296 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug3: receive packet: type 21
debug1: SSH2_MSG_NEWKEYS received
debug2: set_newkeys: mode 0
debug1: rekey after 4294967296 blocks
debug2: key: /home/<...>/.ssh/id_rsa (200855b8)
debug2: key: /home/<...>/.ssh/id_dsa (0)
debug2: key: /home/<...>/.ssh/id_ecdsa (0)
debug2: key: /home/<...>/.ssh/id_ed25519 (0)
debug3: send packet: type 5
debug3: receive packet: type 6
debug2: service_accept: ssh-userauth
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug3: send packet: type 50
debug3: receive packet: type 51
debug1: Authentications that can continue: publickey
debug3: start over, passed a different list publickey
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: Offering RSA public key: /home/<...>/.ssh/id_rsa
debug3: send_pubkey_test
debug3: send packet: type 50
debug2: we sent a publickey packet, wait for reply
debug3: receive packet: type 60
debug1: Server accepts key: pkalg ssh-rsa blen 279
debug2: input_userauth_pk_ok: fp SHA256:<...>
debug3: sign_and_send_pubkey: RSA SHA256:<...>
debug3: send packet: type 106
debug1: Sent ALLOW_PKCS12_KEYSTORE_CLIENT_FLAG packet
debug3: send packet: type 50
debug3: receive packet: type 51
debug1: Authentications that can continue: publickey
debug1: Trying private key: /home/<...>/.ssh/id_dsa
debug3: no such identity: /home/<...>/.ssh/id_dsa: No such file or directory
debug1: Trying private key: /home/<...>/.ssh/id_ecdsa
debug3: no such identity: /home/<...>/.ssh/id_ecdsa: No such file or directory
debug1: Trying private key: /home/<...>/.ssh/id_ed25519
debug3: no such identity: /home/<...>/.ssh/id_ed25519: No such file or directory
debug2: we did not send a packet, disable method
debug1: No more authentication methods to try.
Permission denied (publickey).
fatal: Could not read from remote repository.Please make sure you have the correct access rights
and the repository exists.

After my key is sent to Mina and accepted with Server accepts key (and Bitbucket logs the acceptance), the AIX openssh client sends packet type 106, then the key is rejected.

The workaround is to set an option in my ~/.ssh/config file:

AllowPKCS12keystoreAutoOpen no

Then I can git clone successfully.

This ssh option is custom and unrecognized on Linux openssh client.

SSHD-887Provide capability to handle unassigned message numbers

• Closed

SSHD-887Provide capability to handle unassigned message numbers

• Closed

• Assignee:

  Lyor Goldstein

  Reporter:

  Antony Suter

Ssh Packet Type 60

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Ssh Packet Type 51

• Created:

  Updated:

  Resolved: