Announce: OpenSSH 4.2 released

Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]
Date: Thursday, September 1, 2005 - 9:21 am

OpenSSH 4.2 has just been released. It will be available from the
mirrors listed at http://www.openssh.com/ shortly.

OpenSSH is a 100% complete SSH protocol version 1.3, 1.5 and 2.0
implementation and includes sftp client and server support.

We would like to thank the OpenSSH community for their continued
support of the project, especially those who contributed source,
reported bugs, tested snapshots and purchased T-shirts or posters.

T-shirt, poster and CD sales directly support the project. Pictures
and more information can be found at:
http://www.openbsd.org/tshirts.html and
http://www.openbsd.org/orders.html

For international orders use http://https.openbsd.org/cgi-bin/order
and for European orders, use http://https.openbsd.org/cgi-bin/order.eu

Changes since OpenSSH 4.1:
============================

- SECURITY: Fix a bug introduced in OpenSSH 4.0 that caused
GatewayPorts to be incorrectly activated for dynamic ("-D") port
forwardings when no listen address was explicitly specified.

- SECURITY: sshd in OpenSSH versions prior to 4.2 allow GSSAPI
credentials to be delegated to users who log in with methods
other than GSSAPI authentication (e.g. public key) when the
client requests it. This behaviour has been changed in OpenSSH
4.2 to only delegate credentials to users who authenticate
using the GSSAPI method. This eliminates the risk of credentials
being inadvertently exposed to an untrusted user/host (though
users should not activate GSSAPIDelegateCredentials to begin
with when the remote user or host is untrusted)

- Added a new compression method that delays the start of zlib
compression until the user has been authenticated successfully.
The new method ("Compression delayed") is on by default in the
server. This eliminates the risk of any zlib vulnerability
leading to a compromise of the server from unauthenticated users.

NB. Older OpenSSH (<3.5) versions have a bug that will cause them
to refuse to connect to any server that does not offer compression
when the client has compression requested. Since the new "delayed"
server mode isn't supported by these older clients, they will
refuse to connect to a new server unless compression is disabled
(on the client end) or the original compression method is enabled
on the server ("Compression yes" in sshd_config)

- Another round of proactive changes for signed vs unsigned integer
bugs has been completed, including changing the atomicio() API to
encourage safer programming. This work is ongoing.

- Added support for the improved arcfour cipher modes from
draft-harris-ssh-arcfour-fixes-02. The improves the cipher's
resistance to a number of attacks by discarding early keystream
output.

- Increase the default size of new RSA/DSA keys generated by
ssh-keygen from 1024 to 2048 bits.

- Many bugfixes and improvements to connection multiplexing,
including:

- Added ControlMaster=auto/autoask options to support opportunistic
multiplexing (see the ssh_config(5) manpage for details).

- The client will now gracefully fallback to starting a new TCP
connection if it cannot connect to a specified multiplexing
control socket

- Added %h (target hostname), %p (target port) and %r (remote
username) expansion sequences to ControlPath. Also allow
ControlPath=none to disable connection multiplexing.

- Implemented support for X11 and agent forwarding over multiplexed
connections. Because of protocol limitations, the slave
connections inherit the master's DISPLAY and SSH_AUTH_SOCK rather
than distinctly forwarding their own.

- Portable OpenSSH: Added support for long passwords (> 8-char) on
UnixWare 7.

- The following bugs from http://bugzilla.mindrot.org/ were closed:

#471 - Misleading error message if /dev/tty perms wrong
#623 - Don't use $HOME in manpages
#829 - Don't allocate a tty if -n option is set
#1025 - Correctly handle disabled special character in ttymodes
#1033 - Fix compile-time warnings
#1046 - AIX 5.3 Garbage on Login
#1054 - Don't terminate connection on getpeername() failure
#1076 - GSSAPIDelegateCredentials issue mentioned above

- Lots of other improvements and fixes. Please refer to the ChangeLog
for details

Thanks to everyone who has contributed patches, problem or test reports.

Checksums:
==========

- SHA1 (openssh-4.2.tar.gz) = d2bd777986a30e446268ceeb24cddbf2edf51b21
- SHA1 (openssh-4.2p1.tar.gz) = 5e7231cfa8ec673ea856ce291b78fac8b380eb78

Reporting Bugs:
===============

- please read http://www.openssh.com/report.html
and http://bugzilla.mindrot.org/

OpenSSH is brought to you by Markus Friedl, Niels Provos, Theo de Raadt,
Kevin Steves, Damien Miller, Ben Lindstrom, Darren Tucker and Tim Rice.

Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]

Messages in current thread:
BSDCan 2004 announcement, Dan Langille, (Wed Jan 14, 4:14 pm)
OpenSSH 3.8 released, Markus Friedl, (Tue Feb 24, 12:29 pm)
Register for the USENIX AsiaBSDCon2004, Michael C. Wu, (Mon Mar 8, 4:04 am)
OpenBSD 3.5 released!, Todd C. Miller, (Fri Apr 30, 7:05 pm)
SUCON'04 - Registration Opened, Henning Brauer, (Tue Jul 27, 6:04 pm)
The Book of PF by Peter N.M. Hansteen., Austin Hook, (Mon Dec 24, 12:28 pm)
The OpenSSH project turns five years old, Damien Miller, (Mon Sep 27, 9:30 pm)
Stephanie for OpenBSD 3.6 released, br1an, (Fri Oct 15, 8:17 am)
3.7 is released!, Theo de Raadt, (Thu May 19, 12:40 pm)
Call for Papers: Eurobsdcon2008 in Strasbourg, France, Mathieu Arnold, (Sun Mar 30, 4:52 pm)
OpenNTPD 3.7 released, Henning Brauer, (Wed Jun 8, 1:42 pm)
Portuguese User Group Meeting, Nuno Morgadinho, (Sat Jul 9, 5:42 pm)
Announce: OpenSSH 4.2 released, Damien Miller, (Thu Sep 1, 9:21 am)
OpenBSD 3.8 released November 1, 2005, Theo de Raadt, (Tue Nov 1, 2:30 am)
BSDCan 2006: Call For Papers - reminder, Dan Langille, (Thu Jan 12, 10:12 am)
BSDCan - two weeks away!, Dan Langille, (Thu Apr 27, 1:19 pm)
AsiaBSDCon 2007 - Call for Papers, Hiroki Sato, (Sun Aug 20, 11:09 am)
Announce: OpenSSH 4.4 released, Damien Miller, (Wed Sep 27, 6:34 pm)
BSDCan 2007 date change, Dan Langille, (Sun Oct 29, 11:53 am)
Announce: OpenSSH 4.6 released, Damien Miller, (Wed Mar 7, 7:10 pm)
Thu gui tu The Transport Journal Online, The Transport Journal Online..., (Wed May 21, 4:51 am)
OpenBSD 4.1 Released, Bob Beck, (Tue May 1, 10:51 am)
EuroBSDcon2007 registration is open! (plus poster-session i..., Poul-Henning Kamp, (Sun Jun 17, 5:43 am)
Announcing: The OpenBSD Foundation, Bob Beck, (Wed Jul 25, 7:44 pm)
EuroBSDCon 2007 - less than four weeks!, Simon L. Nielsen, (Tue Aug 21, 4:47 pm)
OpenBSD 4.4 released, Nov 1. Enjoy!, Theo de Raadt, (Fri Oct 31, 12:34 pm)
Announce: OpenSSH 5.2 released, Damien Miller, (Sun Feb 22, 10:23 pm)
OpenBSD/sparc64 X support, Jason Wright, (Fri Feb 8, 3:56 pm)
Revised OpenSSH Security Advisory (adv.token), Markus Friedl, (Fri Apr 26, 7:59 am)
BSD "Lightning talks" wanted for O'Reilly Conference, Brett Glass, (Wed Jun 12, 7:35 pm)
OpenBSD 4.5 released, May 1, 2009, Theo de Raadt, (Thu Apr 30, 1:07 pm)
BSDCon 2003 - Call for Papers, Alex Walker, (Mon Feb 3, 8:10 pm)
BSDCon 2003 Submission Deadline April 1, 2003, Todd C. Miller, (Thu Mar 20, 3:52 pm)
Announce: OpenSSH 5.1 released, Damien Miller, (Mon Jul 21, 8:11 pm)
(Open)BSD System Administration Training, Jeremy C. Reed, (Fri Jul 18, 8:09 pm)
BSDCon 03 reminder, Todd C. Miller, (Thu Aug 14, 3:35 pm)
OpenBSD 3.4 Released, Ted Unangst, (Thu Oct 30, 7:22 pm)
Reclaim Bank Charges: Contact us!, PPI Claims Specialists, (Sun Sep 20, 5:24 pm)