refactor authentication logging
optionally record successful auth methods and public credentials
used in a file accessible to user sessions
feedback and ok markus@
Upstream-ID: 090b93036967015717b9a54fd0467875ae9d32fb
Mark the sshd_config UsePrivilegeSeparation option as
deprecated, effectively making privsep mandatory in sandboxing mode. ok
markus@ deraadt@
(note: this doesn't remove the !privsep code paths, though that will
happen eventually).
Upstream-ID: b4c52666256c4dd865f8ce9431af5d6ce2d74a0a
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
sshd_config is documented to set
GSSAPIStrictAcceptorCheck=yes by default, so actually make it do this.
bz#2637 ok dtucker
Upstream-ID: 99ef8ac51f17f0f7aec166cb2e34228d4d72a665
Add a sshd_config DisableForwaring option that disables
X11, agent, TCP, tunnel and Unix domain socket forwarding, as well as
anything else we might implement in the future.
This, like the 'restrict' authorized_keys flag, is intended to be a
simple and future-proof way of restricting an account. Suggested as
a complement to 'restrict' by Jann Horn; ok markus@
Upstream-ID: 203803f66e533a474086b38a59ceb4cf2410fcf7
Validate address ranges for AllowUser/DenyUsers at
configuration load time and refuse to accept bad ones. It was previously
possible to specify invalid CIDR address ranges (e.g. djm@127.1.2.3/55) and
these would always match.
Thanks to Laurence Parry for a detailed bug report. ok markus (for
a previous diff version)
Upstream-ID: 9dfcdd9672b06e65233ea4434c38226680d40bfb
restore pre-auth compression support in the client -- the
previous commit was intended to remove it from the server only.
remove a few server-side pre-auth compression bits that escaped
adjust wording of Compression directive in sshd_config(5)
pointed out by naddy@ ok markus@
Upstream-ID: d23696ed72a228dacd4839dd9f2dec424ba2016b
Remove support for pre-authentication compression. Doing
compression early in the protocol probably seemed reasonable in the 1990s,
but today it's clearly a bad idea in terms of both cryptography (cf. multiple
compression oracle attacks in TLS) and attack surface.
Moreover, to support it across privilege-separation zlib needed
the assistance of a complex shared-memory manager that made the
required attack surface considerably larger.
Prompted by Guido Vranken pointing out a compiler-elided security
check in the shared memory manager found by Stack
(http://css.csail.mit.edu/stack/); ok deraadt@ markus@
NB. pre-auth authentication has been disabled by default in sshd
for >10 years.
Upstream-ID: 32af9771788d45a0779693b41d06ec199d849caf
add a sIgnore opcode that silently ignores options and
use it to suppress noisy deprecation warnings for the Protocol directive.
req henning, ok markus
Upstream-ID: 9fe040aca3d6ff393f6f7e60045cdd821dc4cbe0
remove UseLogin option and support for having /bin/login
manage login sessions; ok deraadt markus dtucker
Upstream-ID: bea7213fbf158efab7e602d9d844fba4837d2712
Remove more SSH1 server code: * Drop sshd's -k option. *
Retire configuration keywords that only apply to protocol 1, as well as the
"protocol" keyword. * Remove some related vestiges of protocol 1 support.
ok markus@
Upstream-ID: 9402f82886de917779db12f8ee3f03d4decc244d
fix AuthenticationMethods during configuration re-parse;
reported by Juan Francisco Cantero Hurtado
Upstream-ID: 8ffa1dac25c7577eca8238e825317ab20848f9b4
ban AuthenticationMethods="" and accept
AuthenticationMethods=any for the default behaviour of not requiring multiple
authentication
bz#2398 from Jakub Jelen; ok dtucker@
Upstream-ID: fabd7f44d59e4518d241d0d01e226435cc23cf27
Fix inverted logic for updating StreamLocalBindMask which
would cause the server to set an invalid mask. ok djm@
Upstream-ID: 8a4404c8307a5ef9e07ee2169fc6d8106b527587
fix overriding of StreamLocalBindMask and
StreamLocalBindUnlink in Match blocks; found the hard way Rogan Dawes
Upstream-ID: 940bc69ec0249ab428d24ccd0722ce35cb932ee2
fix signed/unsigned errors reported by clang-3.7; add
sshbuf_dup_string() to replace a common idiom of strdup(sshbuf_ptr()) with
better safety checking; feedback and ok markus@
Upstream-ID: 71f926d9bb3f1efed51319a6daf37e93d57c8820
refactor canohost.c: move functions that cache results closer
to the places that use them (authn and session code). After this, no state is
cached in canohost.c
feedback and ok markus@
Upstream-ID: 5f2e4df88d4803fc8ec59ec53629105e23ce625e
make sandboxed privilege separation the default, not just
for new installs; "absolutely" deraadt@
Upstream-ID: 5221ef3b927d2df044e9aa3f5db74ae91743f69b
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
Support "none" as an argument for sshd_config
ForceCommand and ChrootDirectory. Useful inside Match blocks to override a
global default. bz#2486 ok dtucker@
Upstream-ID: 7ef478d6592bc7db5c7376fc33b4443e63dccfa5
add prohibit-password as a synonymn for without-password,
since the without-password is causing too many questions. Harden it to ban
all but pubkey, hostbased, and GSSAPI auth (when the latter is enabled) from
djm, ok markus
Upstream-ID: d53317d7b28942153e6236d3fd6e12ceb482db7a
change default: PermitRootLogin without-password matching
install script changes coming as well ok djm markus
Upstream-ID: 0e2a6c4441daf5498b47a61767382bead5eb8ea6
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
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
add knob to relax GSSAPI host credential check for
multihomed hosts bz#928, patch by Simon Wilkinson; ok dtucker
(kerberos/GSSAPI is not compiled by default on OpenBSD)
Upstream-ID: 15ddf1c6f7fd9d98eea9962f480079ae3637285d
add AuthorizedPrincipalsCommand that allows getting
authorized_principals from a subprocess rather than a file, which is quite
useful in deployments with large userbases
feedback and ok markus@
Upstream-ID: aa1bdac7b16fc6d2fa3524ef08f04c7258d247f6
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@
a couple of parse targets were missing activep checks,
causing them to be misapplied in match context; bz#2272 diagnosis and
original patch from Sami Hartikainen ok dtucker@
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@
Two small fixes for sshd -T: ListenAddress'es are added
to a list head so reverse the order when printing them to ensure the
behaviour remains the same, and print StreamLocalBindMask as octal with
leading zero. ok deraadt@
