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- After a transition period of about 10 years, this release disables SSH
protocol 1 by default. Clients and servers that need to use the
legacy protocol must explicitly enable it in ssh_config / sshd_config
or on the command-line.
- Remove the libsectok/OpenSC-based smartcard code and add support for
PKCS#11 tokens. This support is enabled by default in the Debian
packaging, since it now doesn't involve additional library
dependencies (closes: #231472, LP: #16918).
- Add support for certificate authentication of users and hosts using a
new, minimal OpenSSH certificate format (closes: #482806).
- Added a 'netcat mode' to ssh(1): "ssh -W host:port ...".
- Add the ability to revoke keys in sshd(8) and ssh(1). (For the Debian
package, this overlaps with the key blacklisting facility added in
openssh 1:4.7p1-9, but with different file formats and slightly
different scopes; for the moment, I've roughly merged the two.)
- Various multiplexing improvements, including support for requesting
port-forwardings via the multiplex protocol (closes: #360151).
- Allow setting an explicit umask on the sftp-server(8) commandline to
override whatever default the user has (closes: #496843).
- Many sftp client improvements, including tab-completion, more options,
and recursive transfer support for get/put (LP: #33378). The old
mget/mput commands never worked properly and have been removed
(closes: #270399, #428082).
- Do not prompt for a passphrase if we fail to open a keyfile, and log
the reason why the open failed to debug (closes: #431538).
- Prevent sftp from crashing when given a "-" without a command. Also,
allow whitespace to follow a "-" (closes: #531561).
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[ssh_config channels.c ssh.1 channels.h ssh.c]
Add a 'netcat mode' (ssh -W). This connects stdio on the client to a
single port forward on the server. This allows, for example, using ssh as
a ProxyCommand to route connections via intermediate servers.
bz #1618, man page help from jmc@, ok markus@
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for a while, but there's no GSSAPI patch available for it yet.
- Change the default cipher order to prefer the AES CTR modes and the
revised "arcfour256" mode to CBC mode ciphers that are susceptible to
CPNI-957037 "Plaintext Recovery Attack Against SSH".
- Add countermeasures to mitigate CPNI-957037-style attacks against the
SSH protocol's use of CBC-mode ciphers. Upon detection of an invalid
packet length or Message Authentication Code, ssh/sshd will continue
reading up to the maximum supported packet length rather than
immediately terminating the connection. This eliminates most of the
known differences in behaviour that leaked information about the
plaintext of injected data which formed the basis of this attack
(closes: #506115, LP: #379329).
- ForceCommand directive now accepts commandline arguments for the
internal-sftp server (closes: #524423, LP: #362511).
- Add AllowAgentForwarding to available Match keywords list (closes:
#540623).
- Make ssh(1) send the correct channel number for
SSH2_MSG_CHANNEL_SUCCESS and SSH2_MSG_CHANNEL_FAILURE messages to
avoid triggering 'Non-public channel' error messages on sshd(8) in
openssh-5.1.
- Avoid printing 'Non-public channel' warnings in sshd(8), since the
ssh(1) has sent incorrect channel numbers since ~2004 (this reverts a
behaviour introduced in openssh-5.1; closes: #496017).
* Update to GSSAPI patch from
http://www.sxw.org.uk/computing/patches/openssh-5.2p1-gsskex-all-20090726.patch,
including cascading credentials support (LP: #416958).
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[ssh_config]
sync with revised default ciphers; pointed out by dkrause@
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[ssh_config]
Add VisualHostKey to example file, ok djm@
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- CVE-2007-4752: Prevent ssh(1) from using a trusted X11 cookie if
creation of an untrusted cookie fails; found and fixed by Jan Pechanec
(closes: #444738).
- sshd(8) in new installations defaults to SSH Protocol 2 only. Existing
installations are unchanged.
- The SSH channel window size has been increased, and both ssh(1)
sshd(8) now send window updates more aggressively. These improves
performance on high-BDP (Bandwidth Delay Product) networks.
- ssh(1) and sshd(8) now preserve MAC contexts between packets, which
saves 2 hash calls per packet and results in 12-16% speedup for
arcfour256/hmac-md5.
- A new MAC algorithm has been added, UMAC-64 (RFC4418) as
"umac-64@openssh.com". UMAC-64 has been measured to be approximately
20% faster than HMAC-MD5.
- Failure to establish a ssh(1) TunnelForward is now treated as a fatal
error when the ExitOnForwardFailure option is set.
- ssh(1) returns a sensible exit status if the control master goes away
without passing the full exit status.
- When using a ProxyCommand in ssh(1), set the outgoing hostname with
gethostname(2), allowing hostbased authentication to work.
- Make scp(1) skip FIFOs rather than hanging (closes: #246774).
- Encode non-printing characters in scp(1) filenames. These could cause
copies to be aborted with a "protocol error".
- Handle SIGINT in sshd(8) privilege separation child process to ensure
that wtmp and lastlog records are correctly updated.
- Report GSSAPI mechanism in errors, for libraries that support multiple
mechanisms.
- Improve documentation for ssh-add(1)'s -d option.
- Rearrange and tidy GSSAPI code, removing server-only code being linked
into the client.
- Delay execution of ssh(1)'s LocalCommand until after all forwardings
have been established.
- In scp(1), do not truncate non-regular files.
- Improve exit message from ControlMaster clients.
- Prevent sftp-server(8) from reading until it runs out of buffer space,
whereupon it would exit with a fatal error (closes: #365541).
- pam_end() was not being called if authentication failed
(closes: #405041).
- Manual page datestamps updated (closes: #433181).
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changes not previously backported to 4.3p2:
- 4.4/4.4p1 (http://www.openssh.org/txt/release-4.4):
+ On portable OpenSSH, fix a GSSAPI authentication abort that could be
used to determine the validity of usernames on some platforms.
+ 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/known_hosts when a non-standard port has been requested
(closes: #50612).
+ 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.
+ Add optional support for OpenSSL hardware accelerators (engines),
enabled using the --with-ssl-engine configure option.
+ Tokens in configuration files may be double-quoted in order to
contain spaces (closes: #319639).
+ Move a debug() call out of a SIGCHLD handler, fixing a hang when the
session exits very quickly (closes: #307890).
+ Fix some incorrect buffer allocation calculations (closes: #410599).
+ ssh-add doesn't ask for a passphrase if key file permissions are too
liberal (closes: #103677).
+ Likewise, ssh doesn't ask either (closes: #99675).
- 4.6/4.6p1 (http://www.openssh.org/txt/release-4.6):
+ sshd now allows the enabling and disabling of authentication methods
on a per user, group, host and network basis via the Match directive
in sshd_config.
+ Fixed an inconsistent check for a terminal when displaying scp
progress meter (closes: #257524).
+ Fix "hang on exit" when background processes are running at the time
of exit on a ttyful/login session (closes: #88337).
* Update to current GSSAPI patch from
http://www.sxw.org.uk/computing/patches/openssh-4.6p1-gsskex-20070312.patch;
install ChangeLog.gssapi.
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[ssh_config]
Add a "MACs" line after "Ciphers" with the default MAC algorithms,
to ease people who want to tweak both (eg. for performance reasons).
ok deraadt@ djm@ dtucker@
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in sshd_config.
* Default client to attempting GSSAPI authentication.
* Remove obsolete GSSAPINoMICAuthentication from sshd_config if it's
found.
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[ssh_config]
Add GSSAPIAuthentication and GSSAPIDelegateCredentials to examples in sample
ssh_config. ok markus@
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[auth-options.c auth-options.h channels.c channels.h clientloop.c]
[misc.c misc.h readconf.c readconf.h scp.c servconf.c servconf.h]
[serverloop.c sftp.c ssh.1 ssh.c ssh_config ssh_config.5 sshconnect.c]
[sshconnect.h sshd.8 sshd_config sshd_config.5]
Add support for tun(4) forwarding over OpenSSH, based on an idea and
initial channel code bits by markus@. This is a simple and easy way to
use OpenSSH for ad hoc virtual private network connections, e.g.
administrative tunnels or secure wireless access. It's based on a new
ssh channel and works similar to the existing TCP forwarding support,
except that it depends on the tun(4) network interface on both ends of
the connection for layer 2 or layer 3 tunneling. This diff also adds
support for LocalCommand in the ssh(1) client.
ok djm@, markus@, jmc@ (manpages), tested and discussed with others
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'ssh-keygen -H' to convert an entire known_hosts file to hashed format.
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[ssh_config]
Make it clear that the example entries in ssh_config are only some of the
commonly-used options and refer the user to ssh_config(5) for more
details; ok djm@
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accept them to the server by default in new installs, although not on
upgrade (closes: #264024).
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of 3.7 and earlier, since it seems immature and causes far too many
problems with existing setups. See README.Debian for details
(closes: #237021).
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[auth1.c readconf.c readconf.h servconf.c servconf.h ssh.c ssh_config
ssh_config.5 sshconnect1.c sshd.8 sshd.c sshd_config sshd_config.5]
remove RhostsAuthentication; suggested by djm@ before; ok djm@, deraadt@,
fgsch@, miod@, henning@, jakob@ and others
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[readconf.c ssh_config ssh_config.5 ssh-keysign.c]
add AddressFamily option to ssh_config (like -4, -6 on commandline).
Portable bug #534; ok markus@
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[readconf.c readconf.h ssh_config ssh_config.5 sshconnect.c]
add a ConnectTimeout option to ssh, based on patch from
Jean-Charles Longuet (jclonguet at free.fr); portable #207 ok markus@
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[ssh-keysign.8 ssh-keysign.c ssh.c ssh_config]
re-enable ssh-keysign's sbit, but make ssh-keysign read
/etc/ssh/ssh_config and exit if HostbasedAuthentication is disabled
globally. based on discussions with deraadt, itojun and sommerfeld;
ok itojun@
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[ssh_config sshd_config]
refer to config file man page
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[ssh_config]
update defaults for RhostsRSAAuthentication and RhostsAuthentication
here too (all options commented out with default value).
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[ssh_config]
remove FallBackToRsh/UseRsh
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[ssh_config]
correct some commented defaults. add Ciphers default. ok markus@
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[ssh_config]
grammar in comment
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[ssh_config]
id_rsa1/2 -> id_rsa; ok markus@
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[readconf.c ssh_config]
default to SSH2, now that m68k runs fast
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- (djm) OpenBSD CVS sync:
- markus@cvs.openbsd.org 2001/02/03 03:08:38
[auth-options.c auth-rh-rsa.c auth-rhosts.c auth.c canohost.c]
[canohost.h servconf.c servconf.h session.c sshconnect1.c sshd.8]
[sshd_config]
make ReverseMappingCheck optional in sshd_config; ok djm@,dugsong@
- markus@cvs.openbsd.org 2001/02/03 03:19:51
[ssh.1 sshd.8 sshd_config]
Skey is now called ChallengeResponse
- markus@cvs.openbsd.org 2001/02/03 03:43:09
[sshd.8]
use no-pty option in .ssh/authorized_keys* if you need a 8-bit clean
channel. note from Erik.Anggard@cygate.se (pr/1659)
- stevesk@cvs.openbsd.org 2001/02/03 10:03:06
[ssh.1]
typos; ok markus@
- djm@cvs.openbsd.org 2001/02/04 04:11:56
[scp.1 sftp-server.c ssh.1 sshd.8 sftp-client.c sftp-client.h]
[sftp-common.c sftp-common.h sftp-int.c sftp-int.h sftp.1 sftp.c]
Basic interactive sftp client; ok theo@
- (djm) Update RPM specs for new sftp binary
- (djm) Update several bits for new optional reverse lookup stuff. I
think I got them all.
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[atomicio.h canohost.h clientloop.h deattack.h dh.h dispatch.h
groupaccess.c groupaccess.h hmac.h hostfile.h includes.h kex.h
key.h log.h login.h match.h misc.h myproposal.h nchan.ms pathnames.h
radix.h readpass.h rijndael.h serverloop.h session.h sftp.h ssh-add.1
ssh-dss.h ssh-keygen.1 ssh-keyscan.1 ssh-rsa.h ssh1.h ssh_config
sshconnect.h sshd_config tildexpand.h uidswap.h uuencode.h]
$OpenBSD$
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- markus@cvs.openbsd.org 2000/11/06 16:04:56
[channels.c channels.h clientloop.c nchan.c serverloop.c]
[session.c ssh.c]
agent forwarding and -R for ssh2, based on work from
jhuuskon@messi.uku.fi
- markus@cvs.openbsd.org 2000/11/06 16:13:27
[ssh.c sshconnect.c sshd.c]
do not disabled rhosts(rsa) if server port > 1024; from
pekkas@netcore.fi
- markus@cvs.openbsd.org 2000/11/06 16:16:35
[sshconnect.c]
downgrade client to 1.3 if server is 1.4; help from mdb@juniper.net
- markus@cvs.openbsd.org 2000/11/09 18:04:40
[auth1.c]
typo; from mouring@pconline.com
- markus@cvs.openbsd.org 2000/11/12 12:03:28
[ssh-agent.c]
off-by-one when removing a key from the agent
- markus@cvs.openbsd.org 2000/11/12 12:50:39
[auth-rh-rsa.c auth2.c authfd.c authfd.h]
[authfile.c hostfile.c kex.c kex.h key.c key.h myproposal.h]
[readconf.c readconf.h rsa.c rsa.h servconf.c servconf.h ssh-add.c]
[ssh-agent.c ssh-keygen.1 ssh-keygen.c ssh.1 ssh.c ssh_config]
[sshconnect1.c sshconnect2.c sshd.8 sshd.c sshd_config ssh-dss.c]
[ssh-dss.h ssh-rsa.c ssh-rsa.h dsa.c dsa.h]
add support for RSA to SSH2. please test.
there are now 3 types of keys: RSA1 is used by ssh-1 only,
RSA and DSA are used by SSH2.
you can use 'ssh-keygen -t rsa -f ssh2_rsa_file' to generate RSA
keys for SSH2 and use the RSA keys for hostkeys or for user keys.
SSH2 RSA or DSA keys are added to .ssh/authorised_keys2 as before.
- (djm) Fix up Makefile and Redhat init script to create RSA host keys
- (djm) Change to interim version
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- (djm) Clean up diff against OpenBSD.
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- deraadt@cvs.openbsd.org 2000/07/11 02:11:34
[session.c sshd.c ]
make MaxStartups code still work with -d; djm
- deraadt@cvs.openbsd.org 2000/07/11 13:17:45
[readconf.c ssh_config]
disable FallBackToRsh by default
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[channels.c]
- fix pr 1196, listen_port and port_to_connect interchanged
[scp.c]
- after completion, replace the progress bar ETA counter with a final
elapsed time; my idea, aaron wrote the patch
[ssh_config sshd_config]
- show 'Protocol' as an example, ok markus@
[sshd.c]
- missing xfree()
- Add missing header to bsd-misc.c
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<andre.lucas@dial.pipex.com>
- Re-added latest (unmodified) OpenBSD manpages
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and script from Andre Lucas <andre.lucas@dial.pipex.com>
- Removed credits from README to CREDITS file, updated.
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