OpenSSH 4.4 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.

Once again, we would like to thank the OpenSSH community for their
continued support of the project, especially those who contributed
code or patches, 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 4.3:

Security bugs resolved in this release:

• Fix a pre-authentication denial of service found by Tavis Ormandy,
  that would cause sshd(8) to spin until the login grace time
  expired.

• Fix an unsafe signal hander reported by Mark Dowd. The signal
  handler was vulnerable to a race condition that could be exploited
  to perform a pre-authentication denial of service. On portable
  OpenSSH, this vulnerability could theoretically lead to
  pre-authentication remote code execution if GSSAPI authentication
  is enabled, but the likelihood of successful exploitation appears
  remote.

• On portable OpenSSH, fix a GSSAPI authentication abort that could
  be used to determine the validity of usernames on some platforms.

This release includes the following new functionality and fixes:

• Implemented conditional configuration in sshd_config(5) using the
  "Match" directive. This allows some configuration options to be
  selectively overridden if specific criteria (based on user, group,
  hostname and/or address) are met. So far a useful subset of post-
  authentication options are supported and more are expected to be
  added in future releases.

• Add support for Diffie-Hellman group exchange key agreement with a
  final hash of SHA256.

• Added a "ForceCommand" directive to sshd_config(5). Similar to the
  command="…" option accepted in ~/.ssh/authorized_keys, this forces
  the execution of the specified command regardless of what the user
  requested. This is very useful in conjunction with the new "Match"
  option.

• Add a "PermitOpen" directive to sshd_config(5). This mirrors the
  permitopen="…" authorized_keys option, allowing fine-grained
  control over the port-forwardings that a user is allowed to
  establish.

• Add optional logging of transactions to sftp-server(8).

• ssh(1) will now record port numbers for hosts stored in
  ~/.ssh/authorized_keys when a non-standard port has been requested.

• Add an "ExitOnForwardFailure" option to cause ssh(1) to exit (with
  a non-zero exit code) when requested port forwardings could not be
  established.

• Extend sshd_config(5) "SubSystem" declarations to allow the
  specification of command-line arguments.

• Replacement of all integer overflow susceptible invocations of
  malloc(3) and realloc(3) with overflow-checking equivalents.

• Many manpage fixes and improvements

• New portable OpenSSH-specific features:

  • Add optional support for SELinux, controlled using the
    –with-selinux configure option (experimental)

  • Add optional support for Solaris process contracts, enabled
    using the --with-solaris-contracts configure option (experimental)
    This option will also include SMF metadata in Solaris packages
    built using the "make package" target

  • Add optional support for OpenSSL hardware accelerators (engines),
    enabled using the --with-ssl-engine configure option.

• Bugs from http://bugzilla.mindrot.org fixed:
  #482 - readconf doesn't accept paths with spaces in them.
  #906 - syslog messages from sshd [net] lost.
  #975 - Kerberos authentication timing can leak information
  about account validity.
  #981 - Flow stop in SSH2.
  #1102 - C program 'write' with zero length hangs.
  #1129 - sshd hangs for command-only invocations due to
  fork/child signals.
  #1131 - error "buffer_append_space:alloc not supported"
  #1138 - Passphrase asked for (but ignored) if key file permissions
  too liberal…
  #1156 - Closes connection after C-c is pressed on QNX.
  #1157 - ssh-keygen doesn't handle DOS line breaks.
  #1159 - %u and %h not handled in IdentityFile.
  #1161 - scp -r fails.
  #1162 - Inappropriate sequence of syslog messages.
  #1166 - openssh-4.3p1 has some issues compiling.
  #1171 - configure can't always figure out LLONG_MAX…
  #1173 - scp reports lost connection for very large files.
  #1177 - Incorrect sshrc file location in Makefile.in.
  #1179 - sshd incorrectly rejects connections due to IP options.
  #1181 - configure should detect when openssl-0.9.8x needs -ldl.
  #1186 - ssh tries multiple times to open unprotected keys.
  #1188 - keyboard-interactive should not allow retry after
  pam_acct_mgmt fails.
  #1193 - Open ssh will not allow changing of passwords on usernames
  greater than 8 characters…
  #1201 - Bind address information is not specified in command line
  help messages.
  #1203 - configure.ac is missing an open [.
  #1207 - sshd does not clear unsuccessful login count on
  non-interactive logins.
  #1218 - GSSAPI client code permits SPNEGO usage.
  #1221 - Banner only suppressed at log level = QUIET (used to be
  at log level < INFO).

• Fixes to memory and file descriptor leaks reported by the Coverity
  static analysis tool

• Fixes to inconsistent pointer checks reported by the Stanford
  SATURN tool

Thanks to everyone who has contributed patches, reported bugs and
tested releases.

Checksums:

• SHA1 (openssh-4.4.tar.gz) = 2294b5e5a591420aa05ff607c1890ab622ace878
• SHA1 (openssh-4.4p1.tar.gz) = 6a52b1dee1c2c9862923c0008d201d98a7fd9d6c

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, Darren Tucker, Jason McIntyre, Tim Rice and
Ben Lindstrom.