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server end than the client (thanks, Damien Miller; closes: #817870, LP: #1558576).
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ssh_kex2 so that it's actually effective (closes: #809696).
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prohibit-password" (closes: #809695).
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been rejected upstream and there isn't much point carrying it any more.
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Ubuntu, which no longer needs it (LP: #1334916, #1502045).
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#799271).
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onto a separate line to make it easier to copy and paste (LP: #1491532).
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* New upstream release (http://www.openssh.com/txt/release-6.7):
- sshd(8): The default set of ciphers and MACs has been altered to
remove unsafe algorithms. In particular, CBC ciphers and arcfour* are
disabled by default. The full set of algorithms remains available if
configured explicitly via the Ciphers and MACs sshd_config options.
- ssh(1), sshd(8): Add support for Unix domain socket forwarding. A
remote TCP port may be forwarded to a local Unix domain socket and
vice versa or both ends may be a Unix domain socket (closes: #236718).
- ssh(1), ssh-keygen(1): Add support for SSHFP DNS records for ED25519
key types.
- sftp(1): Allow resumption of interrupted uploads.
- ssh(1): When rekeying, skip file/DNS lookups of the hostkey if it is
the same as the one sent during initial key exchange.
- sshd(8): Allow explicit ::1 and 127.0.0.1 forwarding bind addresses
when GatewayPorts=no; allows client to choose address family.
- sshd(8): Add a sshd_config PermitUserRC option to control whether
~/.ssh/rc is executed, mirroring the no-user-rc authorized_keys
option.
- ssh(1): Add a %C escape sequence for LocalCommand and ControlPath that
expands to a unique identifer based on a hash of the tuple of (local
host, remote user, hostname, port). Helps avoid exceeding miserly
pathname limits for Unix domain sockets in multiplexing control paths.
- sshd(8): Make the "Too many authentication failures" message include
the user, source address, port and protocol in a format similar to the
authentication success / failure messages.
- Use CLOCK_BOOTTIME in preference to CLOCK_MONOTONIC when it is
available. It considers time spent suspended, thereby ensuring
timeouts (e.g. for expiring agent keys) fire correctly (closes:
#734553).
- Use prctl() to prevent sftp-server from accessing
/proc/self/{mem,maps}.
* Restore TCP wrappers support, removed upstream in 6.7. It is true that
dropping this reduces preauth attack surface in sshd. On the other
hand, this support seems to be quite widely used, and abruptly dropping
it (from the perspective of users who don't read openssh-unix-dev) could
easily cause more serious problems in practice. It's not entirely clear
what the right long-term answer for Debian is, but it at least probably
doesn't involve dropping this feature shortly before a freeze.
* Replace patch to disable OpenSSL version check with an updated version
of Kurt Roeckx's patch from #732940 to just avoid checking the status
field.
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prevent a hang on re-exec (thanks, Robie Basak; LP: #1306877).
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* New upstream release (http://www.openssh.com/txt/release-6.6).
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from Damien Miller.
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* New upstream release (http://www.openssh.com/txt/release-6.5,
LP: #1275068):
- ssh(1): Add support for client-side hostname canonicalisation using a
set of DNS suffixes and rules in ssh_config(5). This allows
unqualified names to be canonicalised to fully-qualified domain names
to eliminate ambiguity when looking up keys in known_hosts or checking
host certificate names (closes: #115286).
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Drop ssh-vulnkey and the associated ssh/ssh-add/sshd integration
code, leaving only basic configuration file compatibility, since it
has been nearly six years since the original vulnerability and this
code is not likely to be of much value any more. See
https://lists.debian.org/debian-devel/2013/09/msg00240.html for my
full reasoning.
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- sftp(1): add support for resuming partial downloads using the "reget"
command and on the sftp commandline or on the "get" commandline using
the "-a" (append) option (closes: #158590).
- ssh(1): add an "IgnoreUnknown" configuration option to selectively
suppress errors arising from unknown configuration directives (closes:
#436052).
- sftp(1): update progressmeter when data is acknowledged, not when it's
sent (partially addresses #708372).
- ssh(1): do not fatally exit when attempting to cleanup multiplexing-
created channels that are incompletely opened (closes: #651357).
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- Add support for multiple required authentication in SSH protocol 2 via
an AuthenticationMethods option (closes: #195716).
- Fix Sophie Germain formula in moduli(5) (closes: #698612).
- Update ssh-copy-id to Phil Hands' greatly revised version (closes:
#99785, #322228, #620428; LP: #518883, #835901, #1074798).
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- Introduce sandboxing of the pre-auth privsep child using an optional
sshd_config(5) "UsePrivilegeSeparation=sandbox" mode that enables
mandatory restrictions on the syscalls the privsep child can perform.
- Add new SHA256-based HMAC transport integrity modes from
http://www.ietf.org/id/draft-dbider-sha2-mac-for-ssh-02.txt.
- The pre-authentication sshd(8) privilege separation slave process now
logs via a socket shared with the master process, avoiding the need to
maintain /dev/log inside the chroot (closes: #75043, #429243,
#599240).
- ssh(1) now warns when a server refuses X11 forwarding (closes:
#504757).
- sshd_config(5)'s AuthorizedKeysFile now accepts multiple paths,
separated by whitespace (closes: #76312). The authorized_keys2
fallback is deprecated but documented (closes: #560156).
- ssh(1) and sshd(8): set IPv6 traffic class from IPQoS, as well as IPv4
ToS/DSCP (closes: #498297).
- ssh-add(1) now accepts keys piped from standard input. E.g. "ssh-add
- < /path/to/key" (closes: #229124).
- Clean up lost-passphrase text in ssh-keygen(1) (closes: #444691).
- Say "required" rather than "recommended" in unprotected-private-key
warning (LP: #663455).
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- Implement Elliptic Curve Cryptography modes for key exchange (ECDH)
and host/user keys (ECDSA) as specified by RFC5656. ECDH and ECDSA
offer better performance than plain DH and DSA at the same equivalent
symmetric key length, as well as much shorter keys.
- sftp(1)/sftp-server(8): add a protocol extension to support a hard
link operation. It is available through the "ln" command in the
client. The old "ln" behaviour of creating a symlink is available
using its "-s" option or through the preexisting "symlink" command.
- scp(1): Add a new -3 option to scp: Copies between two remote hosts
are transferred through the local host (closes: #508613).
- ssh(1): "atomically" create the listening mux socket by binding it on
a temporary name and then linking it into position after listen() has
succeeded. This allows the mux clients to determine that the server
socket is either ready or stale without races (closes: #454784).
Stale server sockets are now automatically removed (closes: #523250).
- ssh(1): install a SIGCHLD handler to reap expired child process
(closes: #594687).
- ssh(1)/ssh-agent(1): honour $TMPDIR for client xauth and ssh-agent
temporary directories (closes: #357469, although only if you arrange
for ssh-agent to actually see $TMPDIR since the setgid bit will cause
it to be stripped off).
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- Added a ControlPersist option to ssh_config(5) that automatically
starts a background ssh(1) multiplex master when connecting. This
connection can stay alive indefinitely, or can be set to automatically
close after a user-specified duration of inactivity (closes: #335697,
#350898, #454787, #500573, #550262).
- Support AuthorizedKeysFile, AuthorizedPrincipalsFile,
HostbasedUsesNameFromPacketOnly, and PermitTunnel in sshd_config(5)
Match blocks (closes: #549858).
- sftp(1): fix ls in working directories that contain globbing
characters in their pathnames (LP: #530714).
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