Bug 526198 - buffer_get_ret: trying to get more bytes 4 than in buffer 0
Summary: buffer_get_ret: trying to get more bytes 4 than in buffer 0
Alias: None
Product: Fedora
Classification: Fedora
Component: openssh
Version: 12
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Jan F. Chadima
QA Contact: Fedora Extras Quality Assurance
Depends On:
TreeView+ depends on / blocked
Reported: 2009-09-29 08:44 UTC by Mark Watts
Modified: 2010-03-19 14:29 UTC (History)
3 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2010-03-19 14:29:24 UTC

Attachments (Terms of Use)

Description Mark Watts 2009-09-29 08:44:54 UTC

SSH into a Juniper SSG140 Firewall, give password then wait for ~10 seconds...

$ ssh -v -l netscreen
OpenSSH_5.1p1, OpenSSL 0.9.8g 19 Oct 2007
debug1: Reading configuration data /home/mwatts/.ssh/config
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: Connecting to [] port 22.
debug1: Connection established.
debug1: identity file /home/mwatts/.ssh/identity type -1
debug1: identity file /home/mwatts/.ssh/id_rsa type 1
debug1: identity file /home/mwatts/.ssh/id_dsa type 2
debug1: Remote protocol version 2.0, remote software version NetScreen
debug1: no match: NetScreen
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.1
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client 3des-cbc hmac-sha1 none
debug1: kex: client->server 3des-cbc hmac-sha1 none
debug1: sending SSH2_MSG_KEXDH_INIT
debug1: expecting SSH2_MSG_KEXDH_REPLY
Warning: Permanently added '' (DSA) to the list of known hosts.
debug1: ssh_dss_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: password
debug1: Next authentication method: password
netscreen@'s password: 
debug1: Authentication succeeded (password).
debug1: channel 0: new [client-session]
debug1: Entering interactive session.
debug1: Requesting authentication agent forwarding.
debug1: Sending environment.
debug1: Sending env LANG = en_GB.UTF-8
Remote Management Console
netscreen(M)-> buffer_get_ret: trying to get more bytes 4 than in buffer 0
buffer_get_int: buffer error

Comment 1 Mark Watts 2009-09-29 10:07:59 UTC
This problem "goes away" with Fedora 11 - openssh-clients-5.2p1-1.fc11.i586 so backporting this version to F10 would probably do it.

Comment 2 Bug Zapper 2009-11-18 12:15:56 UTC
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Comment 3 Mark Watts 2010-02-08 16:24:59 UTC
Re-opening, its back again on Fedora 12.

$ rpm -q openssh-clients

$ ssh netscreen@ssg-140
netscreen@ssg-140's password: 
Remote Management Console
ssg-140-> buffer_get_ret: trying to get more bytes 4 than in buffer 0
buffer_get_int: buffer error

Comment 4 Jan F. Chadima 2010-03-16 16:44:00 UTC
can you test the latest version openssh from f-13? there is openssh-5.4p1 which has rewritten the transport layer and message multiplex.

Comment 5 Mark Watts 2010-03-19 14:29:24 UTC
OK, I still see the same issue with openssh-clients-5.4p1-1.fc13.i686.rpm

However, I think it may be related to the following section I have in my users ~/.ssh/config file:

Host *
     ServerAliveCountMax 4
     ServerAliveInterval 15

As another user (root in this case) I do _not_ see the disconnect, so I think I've actually found a bug in ScreenOS on Juniper firewalls, not a bug in SSH itself.

As a result, I'm closing this again.

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