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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in previous versions of Debian's OpenSSH package but since superseded by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: 2013-09-14
Patch-Name: keepalive-extensions.patch
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Bug: https://bugzilla.mindrot.org/show_bug.cgi?id=1712
Last-Update: 2013-09-14
Patch-Name: ssh1-keepalive.patch
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In 2008, Debian (and derived distributions such as Ubuntu) shipped an
OpenSSL package with a flawed random number generator, causing OpenSSH to
generate only a very limited set of keys which were subject to private half
precomputation. To mitigate this, this patch checks key authentications
against a blacklist of known-vulnerable keys, and adds a new ssh-vulnkey
program which can be used to explicitly check keys against that blacklist.
See CVE-2008-0166.
Bug: https://bugzilla.mindrot.org/show_bug.cgi?id=1469
Last-Update: 2013-09-14
Patch-Name: ssh-vulnkey.patch
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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: 2013-11-09
Patch-Name: gssapi.patch
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[ssh.1 ssh_config.5]
some proxyusefdpass tweaks;
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[readconf.c readconf.h ssh_config.5 sshconnect.c]
Add a ssh_config ProxyUseFDPass option that supports the use of
ProxyCommands that establish a connection and then pass a connected
file descriptor back to ssh(1). This allows the ProxyCommand to exit
rather than have to shuffle data back and forth and enables ssh to use
getpeername, etc. to obtain address information just like it does with
regular directly-connected sockets. ok markus@
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[ssh-keygen.1 ssh.1 ssh_config.5 sshd.8 sshd_config.5]
do not use Sx for sections outwith the man page - ingo informs me that
stuff like html will render with broken links;
issue reported by Eric S. Raymond, via djm
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[ssh_config.5]
explicitly mention that IdentitiesOnly can be used with IdentityFile
to control which keys are offered from an agent.
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[ssh_config.5]
put IgnoreUnknown in the right place;
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[ssh_config.5 readconf.h readconf.c]
add the ability to ignore specific unrecognised ssh_config options;
bz#866; ok markus@
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[ssh_config sshconnect2.c packet.c readconf.h readconf.c clientloop.c
ssh_config.5 packet.h]
Add an optional second argument to RekeyLimit in the client to allow
rekeying based on elapsed time in addition to amount of traffic.
with djm@ jmc@, ok djm
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[PROTOCOL authfile.c cipher.c cipher.h kex.c kex.h monitor_wrap.c]
[myproposal.h packet.c ssh_config.5 sshd_config.5]
support AES-GCM as defined in RFC 5647 (but with simpler KEX handling)
ok and feedback djm@
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[PROTOCOL authfile.c cipher.c cipher.h kex.h mac.c myproposal.h]
[packet.c ssh_config.5 sshd_config.5]
add encrypt-then-mac (EtM) modes to openssh by defining new mac algorithms
that change the packet format and compute the MAC over the encrypted
message (including the packet size) instead of the plaintext data;
these EtM modes are considered more secure and used by default.
feedback and ok djm@
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[ssh_config.5 sshconnect2.c]
Make IdentitiesOnly apply to keys obtained from a PKCS11Provider.
This allows control of which keys are offered from tokens using
IdentityFile. ok markus@
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[myproposal.h ssh_config.5 umac.h sshd_config.5 ssh.1 sshd.8 mac.c]
add umac128 variant; ok djm@ at n2k12
(note: further Makefile work is required)
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[ssh_config.5 sshd_config.5]
match the documented MAC order of preference to the actual one;
ok dtucker@
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[mac.c myproposal.h ssh_config.5 sshd_config.5]
Remove hmac-sha2-256-96 and hmac-sha2-512-96 MACs since they were removed
from draft6 of the spec and will not be in the RFC when published. Patch
from mdb at juniper net via bz#2023, ok markus.
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[ssh_config.5]
RSA instead of DSA twice. From Steve.McClellan at radisys com
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[ssh_config.5 sshd_config.5]
fix typo in IPQoS parsing: there is no "AF14" class, but there is
an "AF21" class. Spotted by giesen AT snickers.org; ok markus stevesk
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[mac.c myproposal.h ssh.1 ssh_config.5 sshd.8 sshd_config.5]
Add new SHA256 and SHA512 based HMAC modes from
http://www.ietf.org/id/draft-dbider-sha2-mac-for-ssh-02.txt
Patch from mdb AT juniper.net; feedback and ok markus@
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[ssh_config.5]
explain IdentifyFile's semantics a little better, prompted by bz#1898
ok dtucker jmc
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[readconf.c readconf.h ssh.c ssh_config.5 sshconnect.c sshconnect2.c]
Remove undocumented legacy options UserKnownHostsFile2 and
GlobalKnownHostsFile2 by making UserKnownHostsFile/GlobalKnownHostsFile
accept multiple paths per line and making their defaults include
known_hosts2; ok markus
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[ssh_config.5]
- tweak previous
- come consistency fixes
ok djm
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[clientloop.c mux.c readconf.c readconf.h ssh.c ssh_config.5]
Add a RequestTTY ssh_config option to allow configuration-based
control over tty allocation (like -t/-T); ok markus@
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[readconf.c ssh_config.5]
support negated Host matching, e.g.
Host *.example.org !c.example.org
User mekmitasdigoat
Will match "a.example.org", "b.example.org", but not "c.example.org"
ok markus@
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[ssh.c ssh_config.5]
add a %L expansion (short-form of the local host name) for ControlPath;
sync some more expansions with LocalCommand; ok markus@
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[ssh_config.5 sshd_config.5]
explain that IPQoS arguments are separated by whitespace; iirc requested
by jmc@ a while back
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[auth.c hostfile.c hostfile.h ssh.c ssh_config.5 sshconnect.c]
[sshconnect.h sshconnect2.c]
automatically order the hostkeys requested by the client based on
which hostkeys are already recorded in known_hosts. This avoids
hostkey warnings when connecting to servers with new ECDSA keys
that are preferred by default; with markus@
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[ssh_config.5]
libary -> library;
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[clientloop.c misc.c misc.h packet.c packet.h readconf.c readconf.h]
[servconf.c servconf.h session.c ssh.c ssh_config.5 sshd_config.5]
allow ssh and sshd to set arbitrary TOS/DSCP/QoS values instead of
hardcoding lowdelay/throughput.
bz#1733 patch from philipp AT redfish-solutions.com; ok markus@ deraadt@
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[scp.1 ssh-add.1 ssh-keygen.1 ssh.1 ssh_config.5 sshd.8 sshd_config.5]
knock out some "-*- nroff -*-" lines;
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[ssh.1 ssh_config.5]
ssh.1: add kexalgorithms to the -o list
ssh_config.5: format the kexalgorithms in a more consistent
(prettier!) way
ok djm
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[kex.c kex.h kexecdh.c kexecdhc.c kexecdhs.c readconf.c readconf.h]
[servconf.c servconf.h ssh_config.5 sshconnect2.c sshd.c sshd_config.5]
add a KexAlgorithms knob to the client and server configuration to allow
selection of which key exchange methods are used by ssh(1) and sshd(8)
and their order of preference.
ok markus@
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[PROTOCOL PROTOCOL.agent PROTOCOL.certkeys auth2-jpake.c authfd.c]
[authfile.c buffer.h dns.c kex.c kex.h key.c key.h monitor.c]
[monitor_wrap.c myproposal.h packet.c packet.h pathnames.h readconf.c]
[ssh-add.1 ssh-add.c ssh-agent.1 ssh-agent.c ssh-keygen.1 ssh-keygen.c]
[ssh-keyscan.1 ssh-keyscan.c ssh-keysign.8 ssh.1 ssh.c ssh2.h]
[ssh_config.5 sshconnect.c sshconnect2.c sshd.8 sshd.c sshd_config.5]
[uuencode.c uuencode.h bufec.c kexecdh.c kexecdhc.c kexecdhs.c ssh-ecdsa.c]
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.
Only the mandatory sections of RFC5656 are implemented, specifically the
three REQUIRED curves nistp256, nistp384 and nistp521 and only ECDH and
ECDSA. Point compression (optional in RFC5656 is NOT implemented).
Certificate host and user keys using the new ECDSA key types are supported.
Note that this code has not been tested for interoperability and may be
subject to change.
feedback and ok markus@
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[ssh.1 ssh_config.5 sshd.8]
Remove mentions of weird "addr/port" alternate address format for IPv6
addresses combinations. It hasn't worked for ages and we have supported
the more commen "[addr]:port" format for a long time. ok jmc@ markus@
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[clientloop.c readconf.c readconf.h ssh.c ssh_config.5]
add a "ControlPersist" option 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. bz#1330 - patch by dwmw2 AT infradead.org, but
further hacked on by wmertens AT cisco.com, apb AT cequrux.com,
martin-mindrot-bugzilla AT earth.li and myself; "looks ok" markus@
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[ssh.c ssh_config.5]
expand %h to the hostname in ssh_config Hostname options. While this
sounds useless, it is actually handy for working with unqualified
hostnames:
Host *.*
Hostname %h
Host *
Hostname %h.example.org
"I like it" markus@
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[ssh_config.5]
tweak previous;
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[ssh.c]
log the hostname and address that we connected to at LogLevel=verbose
after authentication is successful to mitigate "phishing" attacks by
servers with trusted keys that accept authentication silently and
automatically before presenting fake password/passphrase prompts;
"nice!" markus@
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- jmc@cvs.openbsd.org 2010/04/16 06:45:01
[ssh_config.5]
tweak previous; ok djm
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[ssh_config.5 sshconnect.c]
expand %r => remote username in ssh_config:ProxyCommand;
ok deraadt markus
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[ssh_config.5]
tweak previous; ok dtucker
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[ssh_config.5]
Reformat default value of PreferredAuthentications entry (current
formatting implies ", " is acceptable as a separator, which it's not.
ok djm@
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[ssh-add.1 ssh.1 ssh_config.5]
mention loading of certificate files from [private]-cert.pub when
they are present; feedback and ok jmc@
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[ssh-add.1 ssh-keygen.1 ssh.1 ssh_config.5]
pkcs#11 is no longer optional; improve wording; ok jmc@
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[pathnames.h readconf.c readconf.h scp.1 sftp.1 ssh-add.1 ssh-add.c]
[ssh-agent.c ssh-keygen.1 ssh-keygen.c ssh.1 ssh.c ssh_config.5]
replace our obsolete smartcard code with PKCS#11.
ftp://ftp.rsasecurity.com/pub/pkcs/pkcs-11/v2-20/pkcs-11v2-20.pdf
ssh(1) and ssh-keygen(1) use dlopen(3) directly to talk to a PKCS#11
provider (shared library) while ssh-agent(1) delegates PKCS#11 to
a forked a ssh-pkcs11-helper process.
PKCS#11 is currently a compile time option.
feedback and ok djm@; inspired by patches from Alon Bar-Lev
`
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[channels.c ssh.1 servconf.c sshd_config.5 sshd.c channels.h servconf.h
ssh-keyscan.1 ssh-keyscan.c readconf.c sshconnect.c misc.c ssh.c
readconf.h scp.1 sftp.1 ssh_config.5 misc.h]
Remove RoutingDomain from ssh since it's now not needed. It can be
replaced with "route exec" or "nc -V" as a proxycommand. "route exec"
also ensures that trafic such as DNS lookups stays withing the specified
routingdomain. For example (from reyk):
# route -T 2 exec /usr/sbin/sshd
or inherited from the parent process
$ route -T 2 exec sh
$ ssh 10.1.2.3
ok deraadt@ markus@ stevesk@ reyk@
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[sshd_config.5 ssh_config.5]
sort previous;
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[sshd_config.5 readconf.c ssh_config.5 scp.1 servconf.c sftp.1 ssh.1]
Rename RDomain config option to RoutingDomain to be more clear and
consistent with other options.
NOTE: if you currently use RDomain in the ssh client or server config,
or ssh/sshd -o, you must update to use RoutingDomain.
ok markus@ djm@
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