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better refuse ForwardX11Trusted=no connections attempted
after ForwardX11Timeout expires; reported by Jann Horn
Upstream-ID: bf0fddadc1b46a0334e26c080038313b4b6dea21
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fatal() when a remote window update causes the window
value to overflow. Reported by Georg Wicherski, ok markus@
Upstream-ID: ead397a9aceb3bf74ebfa5fcaf259d72e569f351
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Fix math error in remote window calculations that causes
eventual stalls for datagram channels. Reported by Georg Wicherski, ok
markus@
Upstream-ID: be54059d11bf64e0d85061f7257f53067842e2ab
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For "ssh -L 12345:/tmp/sock" don't fail with "No forward host
name." (we have a path, not a host name). Based on a diff from Jared
Yanovich. OK djm@
Upstream-ID: 2846b0a8c7de037e33657f95afbd282837fc213f
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Use xcalloc for permitted_adm_opens instead of xmalloc to
ensure it's zeroed. Fixes post-auth crash with permitopen=none. bz#2355, ok
djm@
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rename xrealloc() to xreallocarray() since it follows
that form. ok djm
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SIZE_MAX is standard, we should be using it in preference to
the obsolete SIZE_T_MAX. OK miod@ beck@
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Reduce use of <sys/param.h> and transition to <limits.h>
throughout. ok djm markus
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move dispatch to struct ssh; ok djm@
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explicitly include sys/param.h in files that use the
howmany() macro; from portable
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fix a few -Wpointer-sign warnings from clang
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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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[channels.c]
fix remote-forward cancel regression; ok markus@
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[channels.c]
allow explicit ::1 and 127.0.0.1 forwarding bind addresses when
GatewayPorts=no; allows client to choose address family;
bz#2222 ok markus@
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[channels.c channels.h clientloop.c ssh.c]
fix remote fwding with same listen port but different listen address
with gerhard@, ok djm@
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when it is available. It takes into account time spent suspended,
thereby ensuring timeouts (e.g. for expiring agent keys) fire
correctly. bz#2228 reported by John Haxby
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[authfile.c bufaux.c buffer.h channels.c krl.c mux.c packet.c packet.h]
[ssh-keygen.c]
buffer_get_string_ptr's return should be const to remind
callers that futzing with it will futz with the actual buffer
contents
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[channels.c]
don't assume that the socks4 username is \0 terminated;
spotted by Ben Hawkes; ok markus@
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[channels.c]
avoid spurious "getsockname failed: Bad file descriptor" errors in ssh -W;
bz#2200, debian#738692 via Colin Watson; ok dtucker@
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[auth2-chall.c authfd.c authfile.c bufaux.c bufec.c canohost.c]
[channels.c cipher-chachapoly.c clientloop.c configure.ac hostfile.c]
[kexc25519.c krl.c monitor.c sandbox-systrace.c session.c]
[sftp-client.c ssh-keygen.c ssh.c sshconnect2.c sshd.c sshlogin.c]
[openbsd-compat/explicit_bzero.c openbsd-compat/openbsd-compat.h]
replace most bzero with explicit_bzero, except a few that cna be memset
ok djm dtucker
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[channels.c]
bz#2147: fix multiple remote forwardings with dynamically assigned
listen ports. In the s->c message to open the channel we were sending
zero (the magic number to request a dynamic port) instead of the actual
listen port. The client therefore had no way of discriminating between
them.
Diagnosis and fix by ronf AT timeheart.net
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[auth-options.c auth2-chall.c authfd.c channels.c cipher-3des1.c]
[clientloop.c gss-genr.c monitor_mm.c packet.c schnorr.c umac.c]
[sftp-client.c sftp-glob.c]
use calloc for all structure allocations; from markus@
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[channels.c]
bz#1297 - tell the client (via packet_send_debug) when their preferred
listen address has been overridden by the server's GatewayPorts;
ok dtucker@
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[channels.c]
avoid unaligned access in code that reused a buffer to send a
struct in_addr in a reply; simpler just use use buffer_put_int();
from portable; spotted by and ok dtucker@
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blocking connecting socket will clear any stored errno that might
otherwise have been retrievable via getsockopt(). A hack to limit writes
to TTYs on AIX was triggering this. Since only AIX needs the hack, wrap
it in an #ifdef. Diagnosis and patch from Ivo Raisr.
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[auth-options.c auth-rsa.c bufaux.c buffer.h channels.c hostfile.c]
[hostfile.h mux.c packet.c packet.h roaming_common.c serverloop.c]
fix pointer-signedness warnings from clang/llvm-3.3; "seems nice" deraadt@
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[channels.c channels.h clientloop.c]
Add an "ABANDONED" channel state and use for mux sessions that are
disconnected via the ~. escape sequence. Channels in this state will
be able to close if the server responds, but do not count as active channels.
This means that if you ~. all of the mux clients when using ControlPersist
on a broken network, the backgrounded mux master will exit when the
Control Persist time expires rather than hanging around indefinitely.
bz#1917, also reported and tested by tedu@. ok djm@ markus@.
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[ssh-agent.c clientloop.c misc.h packet.c progressmeter.c misc.c
channels.c sandbox-systrace.c]
Use clock_gettime(CLOCK_MONOTONIC ...) for ssh timers so that things like
keepalives and rekeying will work properly over clock steps. Suggested by
markus@, "looks good" djm@.
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[xmalloc.h cipher.c sftp-glob.c ssh-keyscan.c ssh.c sftp-common.c
ssh-ecdsa.c auth2-chall.c compat.c readconf.c kexgexs.c monitor.c
gss-genr.c cipher-3des1.c kex.c monitor_wrap.c ssh-pkcs11-client.c
auth-options.c rsa.c auth2-pubkey.c sftp.c hostfile.c auth2.c
servconf.c auth.c authfile.c xmalloc.c uuencode.c sftp-client.c
auth2-gss.c sftp-server.c bufaux.c mac.c session.c jpake.c kexgexc.c
sshconnect.c auth-chall.c auth2-passwd.c sshconnect1.c buffer.c
kexecdhs.c kexdhs.c ssh-rsa.c auth1.c ssh-pkcs11.c auth2-kbdint.c
kexdhc.c sshd.c umac.c ssh-dss.c auth2-jpake.c bufbn.c clientloop.c
monitor_mm.c scp.c roaming_client.c serverloop.c key.c auth-rsa.c
ssh-pkcs11-helper.c ssh-keysign.c ssh-keygen.c match.c channels.c
sshconnect2.c addrmatch.c mux.c canohost.c kexecdhc.c schnorr.c
ssh-add.c misc.c auth2-hostbased.c ssh-agent.c bufec.c groupaccess.c
dns.c packet.c readpass.c authfd.c moduli.c]
bye, bye xfree(); ok markus@
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[channels.c sshd.c]
handle ECONNABORTED for accept(); ok deraadt some time ago...
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[auth-options.c channels.c servconf.c servconf.h serverloop.c session.c]
[sshd_config.5]
make AllowTcpForwarding accept "local" and "remote" in addition to its
current "yes"/"no" to allow the server to specify whether just local or
remote TCP forwarding is enabled. ok markus@
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[channels.c]
fix function proto/source mismatch
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[channels.c channels.h clientloop.c serverloop.c]
don't spin in accept() when out of fds (ENFILE/ENFILE) - back off for a
while; ok deraadt@ markus@
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[channels.c channels.h servconf.c]
Add PermitOpen none option based on patch from Loganaden Velvindron
(bz #1949). ok djm@
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[mux.c readconf.h channels.h compat.h compat.c ssh.c readconf.c channels.c version.h]
unbreak remote portforwarding with dynamic allocated listen ports:
1) send the actual listen port in the open message (instead of 0).
this allows multiple forwardings with a dynamic listen port
2) update the matching permit-open entry, so we can identify where
to connect to
report: den at skbkontur.ru and P. Szczygielski
feedback and ok djm@
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[channels.c auth-options.c servconf.c channels.h sshd.8]
Add wildcard support to PermitOpen, allowing things like "PermitOpen
localhost:*". bz #1857, ok djm markus.
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[channels.c channels.h clientloop.c ssh.1]
support cancellation of local/dynamic forwardings from ~C commandline;
ok & feedback djm@
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[channels.c channels.h clientloop.h mux.c ssh.c]
support for cancelling local and remote port forwards via the multiplex
socket. Use ssh -O cancel -L xx:xx:xx -R yy:yy:yy user@host" to request
the cancellation of the specified forwardings; ok markus@
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[channels.c channels.h clientloop.c clientloop.h mux.c ssh.c]
hook up a channel confirm callback to warn the user then requested X11
forwarding was refused by the server; ok markus@
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[channels.c]
remove a debug() that pollutes stderr on client connecting to a server
in debug mode (channel_close_fds is called transitively from the session
code post-fork); bz#1719, ok dtucker
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[channels.c]
Fix a trio of bugs in the local/remote window calculation for datagram
data channels (i.e. TunnelForward):
Calculate local_consumed correctly in channel_handle_wfd() by measuring
the delta to buffer_len(c->output) from when we start to when we finish.
The proximal problem here is that the output_filter we use in portable
modified the length of the dequeued datagram (to futz with the headers
for !OpenBSD).
In channel_output_poll(), don't enqueue datagrams that won't fit in the
peer's advertised packet size (highly unlikely to ever occur) or which
won't fit in the peer's remaining window (more likely).
In channel_input_data(), account for the 4-byte string header in
datagram packets that we accept from the peer and enqueue in c->output.
report, analysis and testing 2/3 cases from wierbows AT us.ibm.com;
"looks good" markus@
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[auth-rsa.c channels.c jpake.c key.c misc.c misc.h monitor.c packet.c]
[ssh-rsa.c]
s/timing_safe_cmp/timingsafe_bcmp/g
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[auth-rsa.c channels.c jpake.c key.c misc.c misc.h monitor.c]
[packet.c ssh-rsa.c]
implement a timing_safe_cmp() function to compare memory without leaking
timing information by short-circuiting like memcmp() and use it for
some of the more sensitive comparisons (though nothing high-value was
readily attackable anyway); "looks ok" markus@
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[channels.c session.c]
bz#1750: fix requirement for /dev/null inside ChrootDirectory for
internal-sftp accidentally introduced in r1.253 by removing the code
that opens and dup /dev/null to stderr and modifying the channels code
to read stderr but discard it instead; ok markus@
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[channels.c mux.c readconf.c readconf.h ssh.h]
bz#1327: remove hardcoded limit of 100 permitopen clauses and port
forwards per direction; ok markus@ stevesk@
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[channels.c channels.h mux.c ssh.c]
Pause the mux channel while waiting for reply from aynch callbacks.
Prevents misordering of replies if new requests arrive while waiting.
Extend channel open confirm callback to allow signalling failure
conditions as well as success. Use this to 1) fix a memory leak, 2)
start using the above pause mechanism and 3) delay sending a success/
failure message on mux slave session open until we receive a reply from
the server.
motivated by and with feedback from markus@
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ok dtucker@
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[channels.c]
fake local addr:port when stdio fowarding as some servers (Tectia at
least) validate that they are well-formed;
reported by imorgan AT nas.nasa.gov
ok dtucker
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