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2017-03-29Various Debian-specific configuration changesColin Watson
ssh: Enable ForwardX11Trusted, returning to earlier semantics which cause fewer problems with existing setups (http://bugs.debian.org/237021). ssh: Set 'SendEnv LANG LC_*' by default (http://bugs.debian.org/264024). ssh: Enable HashKnownHosts by default to try to limit the spread of ssh worms. ssh: Enable GSSAPIAuthentication by default. sshd: Enable PAM, disable ChallengeResponseAuthentication, and disable PrintMotd. sshd: Enable X11Forwarding. sshd: Set 'AcceptEnv LANG LC_*' by default. sshd: Change sftp subsystem path to /usr/lib/openssh/sftp-server. Document all of this. Author: Russ Allbery <rra@debian.org> Forwarded: not-needed Last-Update: 2016-12-26 Patch-Name: debian-config.patch
2017-03-29Document that HashKnownHosts may break tab-completionColin Watson
Bug: https://bugzilla.mindrot.org/show_bug.cgi?id=1727 Bug-Debian: http://bugs.debian.org/430154 Last-Update: 2013-09-14 Patch-Name: doc-hash-tab-completion.patch
2017-03-29Allow harmless group-writabilityColin Watson
Allow secure files (~/.ssh/config, ~/.ssh/authorized_keys, etc.) to be group-writable, provided that the group in question contains only the file's owner. Rejected upstream for IMO incorrect reasons (e.g. a misunderstanding about the contents of gr->gr_mem). Given that per-user groups and umask 002 are the default setup in Debian (for good reasons - this makes operating in setgid directories with other groups much easier), we need to permit this by default. Bug: https://bugzilla.mindrot.org/show_bug.cgi?id=1060 Bug-Debian: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=314347 Last-Update: 2013-09-14 Patch-Name: user-group-modes.patch
2017-03-29Various keepalive extensionsRichard Kettlewell
Add compatibility aliases for ProtocolKeepAlives and SetupTimeOut, supported in previous versions of Debian's OpenSSH package but since superseded by ServerAliveInterval. (We're probably stuck with this bit for compatibility.) In batch mode, default ServerAliveInterval to five minutes. Adjust documentation to match and to give some more advice on use of keepalives. Author: Ian Jackson <ian@chiark.greenend.org.uk> Author: Matthew Vernon <matthew@debian.org> Author: Colin Watson <cjwatson@debian.org> Last-Update: 2016-12-26 Patch-Name: keepalive-extensions.patch
2017-03-29GSSAPI key exchange supportSimon Wilkinson
This patch has been rejected upstream: "None of the OpenSSH developers are in favour of adding this, and this situation has not changed for several years. This is not a slight on Simon's patch, which is of fine quality, but just that a) we don't trust GSSAPI implementations that much and b) we don't like adding new KEX since they are pre-auth attack surface. This one is particularly scary, since it requires hooks out to typically root-owned system resources." However, quite a lot of people rely on this in Debian, and it's better to have it merged into the main openssh package rather than having separate -krb5 packages (as we used to have). It seems to have a generally good security history. Bug: https://bugzilla.mindrot.org/show_bug.cgi?id=1242 Last-Updated: 2017-01-16 Patch-Name: gssapi.patch
2017-02-28upstream commitjmc@openbsd.org
errant dot; from klemens nanni Upstream-ID: 83d93366a5acf47047298c5d3ebc5e7426f37921
2017-02-04upstream commitdjm@openbsd.org
support =- for removing methods from algorithms lists, e.g. Ciphers=-*cbc; suggested by Cristian Ionescu-Idbohrn in bz#2671 "I like it" markus@ Upstream-ID: c78c38f9f81a963b33d0eade559f6048add24a6d
2016-10-19upstream commitjmc@openbsd.org
various formatting fixes, specifically removing Dq; Upstream-ID: 81e85df2b8e474f5f93d66e61d9a4419ce87347c
2016-09-29upstream commitjmc@openbsd.org
use a separate TOKENS section, as we've done for sshd_config(5); help/ok djm Upstream-ID: 640e32b5e4838e4363738cdec955084b3579481d
2016-09-24upstream commitdjm@openbsd.org
mention curve25519-sha256 KEX Upstream-ID: 33ae1f433ce4795ffa6203761fbdf86e0d7ffbaf
2016-09-12upstream commitdjm@openbsd.org
remove 3des-cbc from the client's default proposal; 64-bit block ciphers are not safe in 2016 and we don't want to wait until attacks like sweet32 are extended to SSH. As 3des-cbc was the only mandatory cipher in the SSH RFCs, this may cause problems connecting to older devices using the defaults, but it's highly likely that such devices already need explicit configuration for KEX and hostkeys anyway. ok deraadt, markus, dtucker Upstream-ID: a505dfe65c6733af0f751b64cbc4bb7e0761bc2f
2016-07-23upstream commitdjm@openbsd.org
improve wording; suggested by jmc@ Upstream-ID: 55cb0a24c8e0618b3ceec80998dc82c85db2d2f8
2016-07-22upstream commitdjm@openbsd.org
reverse the order in which -J/JumpHost proxies are visited to be more intuitive and document reported by and manpage bits naddy@ Upstream-ID: 3a68fd6a841fd6cf8cedf6552a9607ba99df179a
2016-07-17upstream commitjmc@openbsd.org
- add proxyjump to the options list - formatting fixes - update usage() ok djm Upstream-ID: 43d318e14ce677a2eec8f21ef5ba2f9f68a59457
2016-07-15upstream commitdjm@openbsd.org
Add a ProxyJump ssh_config(5) option and corresponding -J ssh(1) command-line flag to allow simplified indirection through a SSH bastion or "jump host". These options construct a proxy command that connects to the specified jump host(s) (more than one may be specified) and uses port-forwarding to establish a connection to the next destination. This codifies the safest way of indirecting connections through SSH servers and makes it easy to use. ok markus@ Upstream-ID: fa899cb8b26d889da8f142eb9774c1ea36b04397
2016-05-19upstream commitmarkus@openbsd.org
allow setting IdentityAgent to SSH_AUTH_SOCK; ok djm@ Upstream-ID: 20c508480d8db3eef18942c0fc39b1fcf25652ac
2016-05-05upstream commitmarkus@openbsd.org
IdentityAgent for specifying specific agent sockets; ok djm@ Upstream-ID: 3e6a15eb89ea0fd406f108826b7dc7dec4fbfac1
2016-04-21upstream commitjmc@openbsd.org
tweak previous; Upstream-ID: 46c1bab91c164078edbccd5f7d06b9058edd814f
2016-04-15upstream commitdjm@openbsd.org
Include directive for ssh_config(5); feedback & ok markus@ Upstream-ID: ae3b76e2e343322b9f74acde6f1e1c5f027d5fff
2016-02-23upstream commitsobrado@openbsd.org
AddressFamily defaults to any. ok djm@ Upstream-ID: 0d94aa06a4b889bf57a7f631c45ba36d24c13e0c
2016-02-18upstream commitdjm@openbsd.org
rsa-sha2-512,rsa-sha2-256 cannot be selected explicitly in *KeyTypes options yet. Remove them from the lists of algorithms for now. committing on behalf of markus@ ok djm@ Upstream-ID: c6e8820eb8e610ac21551832c0c89684a9a51bb7
2016-02-18upstream commitjmc@openbsd.org
since these pages now clearly tell folks to avoid v1, normalise the docs from a v2 perspective (i.e. stop pointing out which bits are v2 only); ok/tweaks djm ok markus Upstream-ID: eb474f8c36fb6a532dc05c282f7965e38dcfa129
2016-02-17upstream commitdjm@openbsd.org
Replace list of ciphers and MACs adjacent to -1/-2 flag descriptions in ssh(1) with a strong recommendation not to use protocol 1. Add a similar warning to the Protocol option descriptions in ssh_config(5) and sshd_config(5); prompted by and ok mmcc@ Upstream-ID: 961f99e5437d50e636feca023978950a232ead5e
2016-02-11upstream commitdjm@openbsd.org
sync crypto algorithm lists in ssh_config(5) and sshd_config(5) with current reality. bz#2527 Upstream-ID: d7fd1b6c1ed848d866236bcb1d7049d2bb9b2ff6
2015-11-16upstream commitjmc@openbsd.org
correct section number for ssh-agent; Upstream-ID: 44be72fd8bcc167635c49b357b1beea8d5674bd6
2015-11-16upstream commitjcs@openbsd.org
Add an AddKeysToAgent client option which can be set to 'yes', 'no', 'ask', or 'confirm', and defaults to 'no'. When enabled, a private key that is used during authentication will be added to ssh-agent if it is running (with confirmation enabled if set to 'confirm'). Initial version from Joachim Schipper many years ago. ok markus@ Upstream-ID: a680db2248e8064ec55f8be72d539458c987d5f4
2015-10-06upstream commitdjm@openbsd.org
add ssh_config CertificateFile option to explicitly list a certificate; patch from Meghana Bhat on bz#2436; ok markus@ Upstream-ID: 58648ec53c510b41c1f46d8fe293aadc87229ab8
2015-10-06upstream commitsobrado@openbsd.org
fix two typos. Upstream-ID: 424402c0d8863a11b51749bacd7f8d932083b709
2015-09-16upstream commitjmc@openbsd.org
tweak previous; Upstream-ID: f29b3cfcfd9aa31fa140c393e7bd48c1c74139d6
2015-09-16upstream commitdjm@openbsd.org
expand %i in ControlPath to UID; bz#2449 patch from Christian Hesse w/ feedback from dtucker@ Upstream-ID: 2ba8d303e555a84e2f2165ab4b324b41e80ab925
2015-09-04upstream commitjmc@openbsd.org
full stop belongs outside the brackets, not inside; Upstream-ID: 99d098287767799ac33d2442a05b5053fa5a551a
2015-09-04upstream commitdjm@openbsd.org
better document ExitOnForwardFailure; bz#2444, ok dtucker@ Upstream-ID: a126209b5a6d9cb3117ac7ab5bc63d284538bfc2
2015-08-19upstream commitjmc@openbsd.org
match myproposal.h order; from brian conway (i snuck in a tweak while here) ok dtucker Upstream-ID: 35174a19b5237ea36aa3798f042bf5933b772c67
2015-07-30upstream commitdjm@openbsd.org
Allow ssh_config and sshd_config kex parameters options be prefixed by a '+' to indicate that the specified items be appended to the default rather than replacing it. approach suggested by dtucker@, feedback dlg@, ok markus@ Upstream-ID: 0f901137298fc17095d5756ff1561a7028e8882a
2015-07-15upstream commitmarkus@openbsd.org
Turn off DSA by default; add HostKeyAlgorithms to the server and PubkeyAcceptedKeyTypes to the client side, so it still can be tested or turned back on; feedback and ok djm@ Upstream-ID: 8450a9e6d83f80c9bfed864ff061dfc9323cec21
2015-07-15upstream commitdjm@openbsd.org
turn off 1024 bit diffie-hellman-group1-sha1 key exchange method (already off in server, this turns it off in the client by default too) ok dtucker@ Upstream-ID: f59b88f449210ab7acf7d9d88f20f1daee97a4fa
2015-06-04upstream commitdjm@openbsd.org
mention CheckHostIP adding addresses to known_hosts; bz#1993; ok dtucker@ Upstream-ID: fd44b68440fd0dc29abf9f2d3f703d74a2396cb7
2015-05-28upstream commitdtucker@openbsd.org
Fix typo (keywork->keyword) Upstream-ID: 8aacd0f4089c0a244cf43417f4f9045dfaeab534
2015-05-28upstream commitdtucker@openbsd.org
Reorder client proposal to prefer diffie-hellman-group-exchange-sha1 over diffie-hellman-group14-sha1. ok djm@ Upstream-ID: 552c08d47347c3ee1a9a57d88441ab50abe17058
2015-04-29upstream commitjmc@openbsd.org
enviroment -> environment: apologies to darren for not spotting that first time round...
2015-04-29upstream commitdtucker@openbsd.org
Document that the TERM environment variable is not subject to SendEnv and AcceptEnv. bz#2386, based loosely on a patch from jjelen at redhat, help and ok jmc@
2015-04-01upstream commitjmc@openbsd.org
ssh-askpass(1) is the default, overridden by SSH_ASKPASS; diff originally from jiri b;
2015-02-21upstream commitdjm@openbsd.org
UpdateHostKeys fixes: I accidentally changed the format of the hostkeys@openssh.com messages last week without changing the extension name, and this has been causing connection failures for people who are running -current. First reported by sthen@ s/hostkeys@openssh.com/hostkeys-00@openssh.com/ Change the name of the proof message too, and reorder it a little. Also, UpdateHostKeys=ask is incompatible with ControlPersist (no TTY available to read the response) so disable UpdateHostKeys if it is in ask mode and ControlPersist is active (and document this)
2015-02-17upstream commitdjm@openbsd.org
Revise hostkeys@openssh.com hostkey learning extension. The client will not ask the server to prove ownership of the private halves of any hitherto-unseen hostkeys it offers to the client. Allow UpdateHostKeys option to take an 'ask' argument to let the user manually review keys offered. ok markus@
2015-02-03upstream commitdjm@openbsd.org
turn UpdateHostkeys off by default until I figure out mlarkin@'s warning message; requested by deraadt@
2015-01-30upstream commitdjm@openbsd.org
Add a ssh_config HostbasedKeyType option to control which host public key types are tried during hostbased authentication. This may be used to prevent too many keys being sent to the server, and blowing past its MaxAuthTries limit. bz#2211 based on patch by Iain Morgan; ok markus@
2015-01-27upstream commitdjm@openbsd.org
correct description of UpdateHostKeys in ssh_config.5 and add it to -o lists for ssh, scp and sftp; pointed out by jmc@
2015-01-27upstream commitdjm@openbsd.org
Host key rotation support. Add a hostkeys@openssh.com protocol extension (global request) for a server to inform a client of all its available host key after authentication has completed. The client may record the keys in known_hosts, allowing it to upgrade to better host key algorithms and a server to gracefully rotate its keys. The client side of this is controlled by a UpdateHostkeys config option (default on). ok markus@
2015-01-09upstream commitjmc@openbsd.org
tweak previous;
2014-12-22upstream commitdjm@openbsd.org
mention ssh -Q feature to list supported { MAC, cipher, KEX, key } algorithms in more places and include the query string used to list the relevant information; bz#2288
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