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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 and disable GSSAPIDelegateCredentials by
default.
Document all of this, along with several sshd defaults set in
debian/openssh-server.postinst.
Author: Russ Allbery <rra@debian.org>
Forwarded: not-needed
Last-Update: 2015-12-07
Patch-Name: debian-config.patch
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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
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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in previous versions of Debian's OpenSSH package but since superseded by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: 2015-11-29
Patch-Name: keepalive-extensions.patch
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These options were used as part of Debian's response to CVE-2008-0166.
Nearly six years later, we no longer need to continue carrying the bulk
of that patch, but we do need to avoid failing when the associated
configuration options are still present.
Last-Update: 2014-02-09
Patch-Name: ssh-vulnkey-compat.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: 2016-08-07
Patch-Name: gssapi.patch
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Fix logic in add_local_forward() that inverted a test
when code was refactored out into bind_permitted(). This broke ssh port
forwarding for non-priv ports as a non root user.
ok dtucker@ 'looks good' deraadt@
Upstream-ID: ddb8156ca03cc99997de284ce7777536ff9570c9
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Factor out "can bind to low ports" check into its own function. This will
make it easier for Portable to support platforms with permissions models
other than uid==0 (eg bz#2625). ok djm@, "doesn't offend me too much"
deraadt@.
Upstream-ID: 86213df4183e92b8f189a6d2dac858c994bfface
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remove superfluous NOTREACHED comment
Upstream-ID: a7485c1f1be618e8c9e38fd9be46c13b2d03b90c
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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
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Do not clobber the global jump_host variables when
parsing an inactive configuration. ok djm@
Upstream-ID: 5362210944d91417d5976346d41ac0b244350d31
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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
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Allow ExitOnForwardFailure and ClearAllForwardings to be
overridden when using ssh -W (but still default to yes in that case).
bz#2577, ok djm@.
Upstream-ID: 4b20c419e93ca11a861c81c284090cfabc8c54d4
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Move the host and port used by ssh -W into the Options
struct. This will make future changes a bit easier. ok djm@
Upstream-ID: 151bce5ecab2fbedf0d836250a27968d30389382
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allow setting IdentityAgent to SSH_AUTH_SOCK; ok djm@
Upstream-ID: 20c508480d8db3eef18942c0fc39b1fcf25652ac
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IdentityAgent for specifying specific agent sockets; ok
djm@
Upstream-ID: 3e6a15eb89ea0fd406f108826b7dc7dec4fbfac1
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Include directive for ssh_config(5); feedback & ok markus@
Upstream-ID: ae3b76e2e343322b9f74acde6f1e1c5f027d5fff
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Replace by defining IPPORT_RESERVED to zero on Cygwin, which should have
the same effect without causing problems syncing patches with OpenBSD.
Resync the two affected functions with OpenBSD. ok djm, sanity checked
by Corinna.
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don't record duplicate LocalForward and RemoteForward
entries; fixes failure with ExitOnForwardFailure+hostname canonicalisation
where the same forwards are added on the second pass through the
configuration file. bz#2562; ok dtucker@
Upstream-ID: 40a51d68b6300f1cc61deecdb7d4847b8b7b0de1
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don't attempt to percent_expand() already-canonicalised
addresses, avoiding unnecessary failures when attempting to connect to scoped
IPv6 addresses (that naturally contain '%' characters)
Upstream-ID: f24569cffa1a7cbde5f08dc739a72f4d78aa5c6a
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Allow RekeyLimits in excess of 4G up to 2**63 bits
(limited by the return type of scan_scaled). Part of bz#2521, ok djm.
Upstream-ID: 13bea82be566b9704821b1ea05bf7804335c7979
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remove roaming support; ok djm@
Upstream-ID: 2cab8f4b197bc95776fb1c8dc2859dad0c64dc56
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Disable experimental client-side roaming support. Server
side was disabled/gutted for years already, but this aspect was surprisingly
forgotten. Thanks for report from Qualys
Upstream-ID: 2328004b58f431a554d4c1bf67f5407eae3389df
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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
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fix execv arguments in a way less likely to cause grief
for -portable; ok dtucker@
Upstream-ID: 5902bf0ea0371f39f1300698dc3b8e4105fc0fc5
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avoid de-const warning & shrink; ok dtucker@
Upstream-ID: 69a85ef94832378952a22c172009cbf52aaa11db
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Do not prepend "exec" to the shell command run by "Match
exec" in a config file. It's an unnecessary optimization from repurposed
ProxyCommand code and prevents some things working with some shells.
bz#2471, pointed out by res at qoxp.net. ok markus@
Upstream-ID: a1ead25ae336bfa15fb58d8c6b5589f85b4c33a3
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include PubkeyAcceptedKeyTypes in ssh -G config dump
Upstream-ID: 6c097ce6ffebf6fe393fb7988b5d152a5d6b36bb
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add ssh_config CertificateFile option to explicitly list
a certificate; patch from Meghana Bhat on bz#2436; ok markus@
Upstream-ID: 58648ec53c510b41c1f46d8fe293aadc87229ab8
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Fix printing (ssh -G ...) of HostKeyAlgorithms=+...
Reported by Bryan Drewery
Upstream-ID: 19ad20c41bd5971e006289b6f9af829dd46c1293
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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
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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
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Fix \-escaping bug that caused forward path parsing to skip
two characters and skip past the end of the string.
Based on patch by Salvador Fandino; ok dtucker@
Upstream-ID: 7b879dc446335677cbe4cb549495636a0535f3bd
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Reorder EscapeChar option parsing to avoid a single-byte
out- of-bounds read. bz#2396 from Jaak Ristioja; ok dtucker@
Upstream-ID: 1dc6b5b63d1c8d9a88619da0b27ade461d79b060
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Remove pattern length argument from match_pattern_list(), we
only ever use it for strlen(pattern).
Prompted by hanno AT hboeck.de pointing an out-of-bound read
error caused by an incorrect pattern length found using AFL
and his own tools.
ok markus@
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rename xrealloc() to xreallocarray() since it follows
that form. ok djm
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fix uninitialised memory read when parsing a config file
consisting of a single nul byte. Found by hanno AT hboeck.de using AFL; ok
dtucker
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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@
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turn UpdateHostkeys off by default until I figure out
mlarkin@'s warning message; requested by deraadt@
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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@
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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@
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Replace <sys/param.h> with <limits.h> and other less
dirty headers where possible. Annotate <sys/param.h> lines with their
current reasons. Switch to PATH_MAX, NGROUPS_MAX, HOST_NAME_MAX+1,
LOGIN_NAME_MAX, etc. Change MIN() and MAX() to local definitions of
MINIMUM() and MAXIMUM() where sensible to avoid pulling in the pollution.
These are the files confirmed through binary verification. ok guenther,
millert, doug (helped with the verification protocol)
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sync ssh-keysign, ssh-keygen and some dependencies to the
new buffer/key API; mostly mechanical, ok markus@
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add sshd_config HostbasedAcceptedKeyTypes and
PubkeyAcceptedKeyTypes options to allow sshd to control what public key types
will be accepted. Currently defaults to all. Feedback & ok markus@
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fix ssh_config FingerprintHash evaluation order; from Petr
Lautrbach
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Add FingerprintHash option to control algorithm used for
key fingerprints. Default changes from MD5 to SHA256 and format from hex to
base64.
Feedback and ok naddy@ markus@
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add RevokedHostKeys option for the client
Allow textfile or KRL-based revocation of hostkeys.
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Remove unnecessary include: netinet/in_systm.h is not needed
by these programs.
NB. skipped for portable
ok deraadt@ millert@
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Tweak config reparsing with host canonicalisation
Make the second pass through the config files always run when
hostname canonicalisation is enabled.
Add a "Match canonical" criteria that allows ssh_config Match
blocks to trigger only in the second config pass.
Add a -G option to ssh that causes it to parse its configuration
and dump the result to stdout, similar to "sshd -T"
Allow ssh_config Port options set in the second config parse
phase to be applied (they were being ignored).
bz#2267 bz#2286; ok markus
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[PROTOCOL auth-options.c auth-passwd.c auth-rh-rsa.c auth-rhosts.c]
[auth-rsa.c auth.c auth1.c auth2-hostbased.c auth2-kbdint.c auth2-none.c]
[auth2-passwd.c auth2-pubkey.c auth2.c canohost.c channels.c channels.h]
[clientloop.c misc.c misc.h monitor.c mux.c packet.c readconf.c]
[readconf.h servconf.c servconf.h serverloop.c session.c ssh-agent.c]
[ssh.c ssh_config.5 sshconnect.c sshconnect1.c sshconnect2.c sshd.c]
[sshd_config.5 sshlogin.c]
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. This is a reimplementation
of the streamlocal patches by William Ahern from:
http://www.25thandclement.com/~william/projects/streamlocal.html
OK djm@ markus@
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