Subject: Announce: OpenSSH 4.2 released
Date: Thursday 1st September 2005 13:21:05 UTC (over 12 years ago)
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.