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2008-07-22* New upstream release (closes: #474301). Important changes not previouslyColin Watson
backported to 4.7p1: - 4.9/4.9p1 (http://www.openssh.com/txt/release-4.9): + Added chroot(2) support for sshd(8), controlled by a new option "ChrootDirectory" (closes: #139047, LP: #24777). + Linked sftp-server(8) into sshd(8). The internal sftp server is used when the command "internal-sftp" is specified in a Subsystem or ForceCommand declaration. When used with ChrootDirectory, the internal sftp server requires no special configuration of files inside the chroot environment. + Added a protocol extension method "posix-rename@openssh.com" for sftp-server(8) to perform POSIX atomic rename() operations; sftp(1) prefers this if available (closes: #308561). + Removed the fixed limit of 100 file handles in sftp-server(8). + ssh(8) will now skip generation of SSH protocol 1 ephemeral server keys when in inetd mode and protocol 2 connections are negotiated. This speeds up protocol 2 connections to inetd-mode servers that also allow Protocol 1. + Accept the PermitRootLogin directive in a sshd_config(5) Match block. Allows for, e.g. permitting root only from the local network. + Reworked sftp(1) argument splitting and escaping to be more internally consistent (i.e. between sftp commands) and more consistent with sh(1). Please note that this will change the interpretation of some quoted strings, especially those with embedded backslash escape sequences. + Support "Banner=none" in sshd_config(5) to disable sending of a pre-login banner (e.g. in a Match block). + ssh(1) ProxyCommands are now executed with $SHELL rather than /bin/sh. + ssh(1)'s ConnectTimeout option is now applied to both the TCP connection and the SSH banner exchange (previously it just covered the TCP connection). This allows callers of ssh(1) to better detect and deal with stuck servers that accept a TCP connection but don't progress the protocol, and also makes ConnectTimeout useful for connections via a ProxyCommand. + scp(1) incorrectly reported "stalled" on slow copies (closes: #140828). + scp(1) date underflow for timestamps before epoch. + ssh(1) used the obsolete SIG DNS RRtype for host keys in DNS, instead of the current standard RRSIG. + Correctly drain ACKs when a sftp(1) upload write fails midway, avoids a fatal() exit from what should be a recoverable condition. + Fixed ssh-keygen(1) selective host key hashing (i.e. "ssh-keygen -HF hostname") to not include any IP address in the data to be hashed. + Make ssh(1) skip listening on the IPv6 wildcard address when a binding address of 0.0.0.0 is used against an old SSH server that does not support the RFC4254 syntax for wildcard bind addresses. + Enable IPV6_V6ONLY socket option on sshd(8) listen socket, as is already done for X11/TCP forwarding sockets (closes: #439661). + Fix FD leak that could hang a ssh(1) connection multiplexing master. + Make ssh(1) -q option documentation consistent with reality. + Fixed sshd(8) PAM support not calling pam_session_close(), or failing to call it with root privileges (closes: #372680). + Fix activation of OpenSSL engine support when requested in configure (LP: #119295). - 5.1/5.1p1 (http://www.openssh.com/txt/release-5.1): + Introduce experimental SSH Fingerprint ASCII Visualisation to ssh(1) and ssh-keygen(1). Visual fingerprint display is controlled by a new ssh_config(5) option "VisualHostKey". The intent is to render SSH host keys in a visual form that is amenable to easy recall and rejection of changed host keys. + sshd_config(5) now supports CIDR address/masklen matching in "Match address" blocks, with a fallback to classic wildcard matching. + sshd(8) now supports CIDR matching in ~/.ssh/authorized_keys from="..." restrictions, also with a fallback to classic wildcard matching. + Added an extended test mode (-T) to sshd(8) to request that it write its effective configuration to stdout and exit. Extended test mode also supports the specification of connection parameters (username, source address and hostname) to test the application of sshd_config(5) Match rules. + ssh(1) now prints the number of bytes transferred and the overall connection throughput for SSH protocol 2 sessions when in verbose mode (previously these statistics were displayed for protocol 1 connections only). + sftp-server(8) now supports extension methods statvfs@openssh.com and fstatvfs@openssh.com that implement statvfs(2)-like operations. + sftp(1) now has a "df" command to the sftp client that uses the statvfs@openssh.com to produce a df(1)-like display of filesystem space and inode utilisation (requires statvfs@openssh.com support on the server). + Added a MaxSessions option to sshd_config(5) to allow control of the number of multiplexed sessions supported over a single TCP connection. This allows increasing the number of allowed sessions above the previous default of 10, disabling connection multiplexing (MaxSessions=1) or disallowing login/shell/subsystem sessions entirely (MaxSessions=0). + Added a no-more-sessions@openssh.com global request extension that is sent from ssh(1) to sshd(8) when the client knows that it will never request another session (i.e. when session multiplexing is disabled). This allows a server to disallow further session requests and terminate the session in cases where the client has been hijacked. + ssh-keygen(1) now supports the use of the -l option in combination with -F to search for a host in ~/.ssh/known_hosts and display its fingerprint. + ssh-keyscan(1) now defaults to "rsa" (protocol 2) keys, instead of "rsa1". + Added an AllowAgentForwarding option to sshd_config(8) to control whether authentication agent forwarding is permitted. Note that this is a loose control, as a client may install their own unofficial forwarder. + ssh(1) and sshd(8): avoid unnecessary malloc/copy/free when receiving network data, resulting in a ~10% speedup. + ssh(1) and sshd(8) will now try additional addresses when connecting to a port forward destination whose DNS name resolves to more than one address. The previous behaviour was to try the only first address and give up if that failed. + ssh(1) and sshd(8) now support signalling that channels are half-closed for writing, through a channel protocol extension notification "eow@openssh.com". This allows propagation of closed file descriptors, so that commands such as "ssh -2 localhost od /bin/ls | true" do not send unnecessary data over the wire. + sshd(8): increased the default size of ssh protocol 1 ephemeral keys from 768 to 1024 bits. + When ssh(1) has been requested to fork after authentication ("ssh -f") with ExitOnForwardFailure enabled, delay the fork until after replies for any -R forwards have been seen. Allows for robust detection of -R forward failure when using -f. + "Match group" blocks in sshd_config(5) now support negation of groups. E.g. "Match group staff,!guests". + sftp(1) and sftp-server(8) now allow chmod-like operations to set set[ug]id/sticky bits. + The MaxAuthTries option is now permitted in sshd_config(5) match blocks. + Multiplexed ssh(1) sessions now support a subset of the ~ escapes that are available to a primary connection. + ssh(1) connection multiplexing will now fall back to creating a new connection in most error cases (closes: #352830). + Make ssh(1) deal more gracefully with channel requests that fail. Previously it would optimistically assume that requests would always succeed, which could cause hangs if they did not (e.g. when the server runs out of file descriptors). + ssh(1) now reports multiplexing errors via the multiplex slave's stderr where possible (subject to LogLevel in the mux master). + Prevent sshd(8) from erroneously applying public key restrictions leaned from ~/.ssh/authorized_keys to other authentication methods when public key authentication subsequently fails (LP: #161047). + Fixed an UMAC alignment problem that manifested on Itanium platforms.
2008-07-09 - (djm) [configure.ac] Add -Wformat-security to CFLAGS for gcc 3.x and 4.xDamien Miller
2008-07-05 - (djm) [configure.ac] unbreak: remove extra closing braceDamien Miller
2008-07-05 - (djm) [atomicio.c configure.ac] Disable poll() fallback in atomiciov forDamien Miller
Tru64. readv doesn't seem to be a comparable object there. bz#1386, patch from dtucker@ ok me
2008-06-16 - (dtucker) [configure.ac] Enable -fno-builtin-memset when using gcc.Darren Tucker
2008-06-14 - (dtucker) [configure.ac] Bug #1276: avoid linking against libgssapi, whichDarren Tucker
despite its name doesn't seem to implement all of GSSAPI. Patch from Jan Engelhardt, sanity checked by Simon Wilkinson.
2008-06-12 - (djm) [channels.c configure.ac]Damien Miller
Do not set SO_REUSEADDR on wildcard X11 listeners (X11UseLocalhost=no) bz#1464; ok dtucker
2008-06-11 - (dtucker) [Makefile.in configure.ac regress/addrmatch.sh] Skip IPv6Darren Tucker
specific tests on platforms that don't do IPv6.
2008-06-09 - (dtucker) [configure.ac defines.h sftp-client.c M sftp-server.c] Add aDarren Tucker
macro to convert fsid to unsigned long for platforms where fsid is a 2-member array.
2008-06-09 - (dtucker) [configure.ac defines.h sftp-client.c sftp-server.c sftp.cDarren Tucker
openbsd-compat/Makefile.in openbsd-compat/openbsd-compat.h openbsd-compat/bsd-statvfs.{c,h}] Add a null implementation of statvfs and fstatvfs and remove #defines around statvfs code. ok djm@
2008-06-08 - (dtucker) [configure.ac defines.h sftp-client.c sftp-server.c sftp.c] Do ↵Darren Tucker
not enable statvfs extensions on platforms that do not have statvfs. ok djm@
2008-05-25Restore OOM killer adjustment for child processes (thanks, Vaclav Ovsik;Colin Watson
closes: #480020).
2008-05-20 - (djm) [configure.ac mux.c sftp.c openbsd-compat/Makefile.in]Damien Miller
[openbsd-compat/fmt_scaled.c openbsd-compat/openbsd-compat.h] Fix compilation on Linux, including pulling in fmt_scaled(3) implementation from OpenBSD's libutil.
2008-05-19 - (djm) [openbsd-compat/bsd-arc4random.c openbsd-compat/openbsd-compat.c]Damien Miller
[configure.ac] Implement arc4random_buf(), import implementation of arc4random_uniform() from OpenBSD
2008-03-27 - (djm) [configure.ac] --with-selinux tooDamien Miller
2008-03-27 - (djm) [configure.ac] fix alignment of --without-stackprotect descriptionDamien Miller
2008-03-09 - (dtucker) [configure.ac] Run stack-protector tests with -Werror to catchDarren Tucker
platforms where gcc understands the option but it's not supported (and thus generates a warning).
2008-03-09 - (dtucker) [configure.ac] It turns out gcc's -fstack-protector-all doesn'tDarren Tucker
always work for all platforms and versions, so test what we can and add a configure flag to turn it of if needed. ok djm@
2008-03-02 - (dtucker) [configure.ac] FreeBSD's glob() doesn't behave the way we expectDarren Tucker
either, so use our own.
2008-02-28 - (dtucker) [configure.ac openbsd-compat/port-aix.{c,h}] Bug #1081: ImplementDarren Tucker
getgrouplist via getgrset on AIX, rather than iterating over getgrent. This allows, eg, Match and AllowGroups directives to work with NIS and LDAP groups.
2008-02-28 - (dtucker) [configure.ac] Add -fstack-protector to LDFLAGS too, fixesDarren Tucker
linking problems on AIX with gcc 4.1.x.
2008-02-25 - (dtucker) [configure.ac audit-bsm.c] Bug #1420: Add a local implementationDarren Tucker
of aug_get_machine for systems that don't have their own (eg OS X, FreeBSD). Help and testing from csjp at FreeBSD org, vgiffin at apple com. ok djm@
2008-02-04* Fix configure detection of getseuserbyname andColin Watson
get_default_context_with_level (LP: #188136).
2008-01-02 - (dtucker) [configure.ac] Fix message for -fstack-protector-all test.Darren Tucker
2007-12-31 - (dtucker) [configure.ac openbsd-compat/glob.{c,h}] Bug #1407: force use ofDarren Tucker
builtin glob implementation on Mac OS X. Based on a patch from vgiffin at apple.
2007-12-24* New upstream release (closes: #453367).Colin Watson
- CVE-2007-4752: Prevent ssh(1) from using a trusted X11 cookie if creation of an untrusted cookie fails; found and fixed by Jan Pechanec (closes: #444738). - sshd(8) in new installations defaults to SSH Protocol 2 only. Existing installations are unchanged. - The SSH channel window size has been increased, and both ssh(1) sshd(8) now send window updates more aggressively. These improves performance on high-BDP (Bandwidth Delay Product) networks. - ssh(1) and sshd(8) now preserve MAC contexts between packets, which saves 2 hash calls per packet and results in 12-16% speedup for arcfour256/hmac-md5. - A new MAC algorithm has been added, UMAC-64 (RFC4418) as "umac-64@openssh.com". UMAC-64 has been measured to be approximately 20% faster than HMAC-MD5. - Failure to establish a ssh(1) TunnelForward is now treated as a fatal error when the ExitOnForwardFailure option is set. - ssh(1) returns a sensible exit status if the control master goes away without passing the full exit status. - When using a ProxyCommand in ssh(1), set the outgoing hostname with gethostname(2), allowing hostbased authentication to work. - Make scp(1) skip FIFOs rather than hanging (closes: #246774). - Encode non-printing characters in scp(1) filenames. These could cause copies to be aborted with a "protocol error". - Handle SIGINT in sshd(8) privilege separation child process to ensure that wtmp and lastlog records are correctly updated. - Report GSSAPI mechanism in errors, for libraries that support multiple mechanisms. - Improve documentation for ssh-add(1)'s -d option. - Rearrange and tidy GSSAPI code, removing server-only code being linked into the client. - Delay execution of ssh(1)'s LocalCommand until after all forwardings have been established. - In scp(1), do not truncate non-regular files. - Improve exit message from ControlMaster clients. - Prevent sftp-server(8) from reading until it runs out of buffer space, whereupon it would exit with a fatal error (closes: #365541). - pam_end() was not being called if authentication failed (closes: #405041). - Manual page datestamps updated (closes: #433181).
2007-12-02 - (dtucker) [configure.ac] Enable -fstack-protector-all on systems whereDarren Tucker
gcc supports it. ok djm@
2007-09-27 - (dtucker) [configure.ac defines.h] Shadow expiry does not work on QNX6Darren Tucker
so disable it for that platform. From bacon at cs nyu edu.
2007-09-27 - (dtucker) [configure.ac atomicio.c] Fall back to <sys/poll.h> if we don'tDarren Tucker
have <poll.h> (eq QNX). From bacon at cs nyu edu.
2007-09-10 - (tim) [configure.ac] Autoconf didn't define HAVE_LIBIAF because weTim Rice
did a AC_CHECK_FUNCS within the AC_CHECK_LIB test.
2007-08-10 - (dtucker) [configure.ac] Bug #1343: Set DISABLE_FD_PASSING for QNX6. From.Darren Tucker
Matt Kraai, ok djm@.
2007-06-25 - (dtucker) [atomicio.c configure.ac openbsd-compat/Makefile.inDarren Tucker
openbsd-compat/bsd-poll.{c,h} openbsd-compat/openbsd-compat.h] Add an implementation of poll() built on top of select(2). Code from OpenNTPD with changes suggested by djm. ok djm@
2007-06-12* New upstream release (closes: #395507, #397961, #420035). ImportantColin Watson
changes not previously backported to 4.3p2: - 4.4/4.4p1 (http://www.openssh.org/txt/release-4.4): + On portable OpenSSH, fix a GSSAPI authentication abort that could be used to determine the validity of usernames on some platforms. + Implemented conditional configuration in sshd_config(5) using the "Match" directive. This allows some configuration options to be selectively overridden if specific criteria (based on user, group, hostname and/or address) are met. So far a useful subset of post-authentication options are supported and more are expected to be added in future releases. + Add support for Diffie-Hellman group exchange key agreement with a final hash of SHA256. + Added a "ForceCommand" directive to sshd_config(5). Similar to the command="..." option accepted in ~/.ssh/authorized_keys, this forces the execution of the specified command regardless of what the user requested. This is very useful in conjunction with the new "Match" option. + Add a "PermitOpen" directive to sshd_config(5). This mirrors the permitopen="..." authorized_keys option, allowing fine-grained control over the port-forwardings that a user is allowed to establish. + Add optional logging of transactions to sftp-server(8). + ssh(1) will now record port numbers for hosts stored in ~/.ssh/known_hosts when a non-standard port has been requested (closes: #50612). + Add an "ExitOnForwardFailure" option to cause ssh(1) to exit (with a non-zero exit code) when requested port forwardings could not be established. + Extend sshd_config(5) "SubSystem" declarations to allow the specification of command-line arguments. + Replacement of all integer overflow susceptible invocations of malloc(3) and realloc(3) with overflow-checking equivalents. + Many manpage fixes and improvements. + Add optional support for OpenSSL hardware accelerators (engines), enabled using the --with-ssl-engine configure option. + Tokens in configuration files may be double-quoted in order to contain spaces (closes: #319639). + Move a debug() call out of a SIGCHLD handler, fixing a hang when the session exits very quickly (closes: #307890). + Fix some incorrect buffer allocation calculations (closes: #410599). + ssh-add doesn't ask for a passphrase if key file permissions are too liberal (closes: #103677). + Likewise, ssh doesn't ask either (closes: #99675). - 4.6/4.6p1 (http://www.openssh.org/txt/release-4.6): + sshd now allows the enabling and disabling of authentication methods on a per user, group, host and network basis via the Match directive in sshd_config. + Fixed an inconsistent check for a terminal when displaying scp progress meter (closes: #257524). + Fix "hang on exit" when background processes are running at the time of exit on a ttyful/login session (closes: #88337). * Update to current GSSAPI patch from http://www.sxw.org.uk/computing/patches/openssh-4.6p1-gsskex-20070312.patch; install ChangeLog.gssapi.
2007-06-11 - (djm) [configure.ac umac.c] If platform doesn't provide swap32(3), thenDamien Miller
fallback to provided bit-swizzing functions
2007-05-0920070509Tim Rice
- (tim) [configure.ac] Bug #1287: Add missing test for ucred.h.
2007-04-29 - (dtucker) [configure.ac defines.h] Have configure check for offsetofDarren Tucker
to prevent redefinition warnings.
2007-04-29 - (dtucker) [configure.ac defines.h] Prevent warnings about __attribute__Darren Tucker
__nonnull__ for versions of GCC that don't support it.
2007-04-29 - (dtucker) [configure.ac defines.h] Have configure check for MAXSYMLINKSDarren Tucker
so we don't get redefinition warnings.
2007-04-29 - (dtucker) [configure.ac openbsd-compat/getrrsetbyname.c] Bug #1299: Use theDarren Tucker
platform's _res if it has one. Should fix problem of DNSSEC record lookups on NetBSD as reported by Curt Sampson.
2007-03-2620070326Tim Rice
- (tim) [auth.c configure.ac defines.h session.c openbsd-compat/port-uw.c openbsd-compat/port-uw.h openbsd-compat/xcrypt.c] Rework libiaf test/defines to account for IRIX having libiaf but not set_id(). Patch with & ok dtucker@
2007-03-25 - (dtucker) [Makefile.in configure.ac] Replace single-purpose LIBSELINUX,Darren Tucker
LIBWRAP and LIBPAM variables in Makefile with the general-purpose SSHDLIBS. "I like" djm@
2007-03-21 - (dtucker) [configure.ac openbsd-compat/bsd-getpeereid.c] Bug #1287: UseDarren Tucker
getpeerucred to implement getpeereid (currently only Solaris 10 and up). Patch by Jan.Pechanec at Sun.
2007-03-05 - (djm) [configure.ac] add a --without-openssl-header-check option toDamien Miller
configure, as some platforms (OS X) ship OpenSSL headers whose version does not match that of the shipping library. ok dtucker@
2007-03-02 - (dtucker) [configure.ac] For Cygwin, read files in textmode (which allowsDarren Tucker
CRLF as well as LF lineendings) and write in binary mode. Patch from vinschen at redhat.com.
2006-12-06* Fix quoting error in configure.ac and regenerate configure (thanks, BenColin Watson
Pfaff; closes: #391248).
2006-10-27Incorporate Manoj's NMU:Colin Watson
* NMU to update SELinux patch, bringing it in line with current selinux releases. The patch for this NMU is simply the Bug#394795 patch, and no other changes. (closes: #394795)
2006-10-07 - (dtucker) [configure.ac] Set put -lselinux into $LIBS while testing forDarren Tucker
SELinux functions so they're detected correctly. Patch from pebenito at gentoo.org.
2006-10-03 - (tim) [configure.ac] Move CHECK_HEADERS test before platform specificTim Rice
section so additional platform specific CHECK_HEADER tests will work correctly. Fixes "<net/if_tap.h> on FreeBSD" problem report by des AT des.no Feedback and "seems like a good idea" dtucker@
2006-09-29 - (dtucker) [configure.ac] Bug #1239: Fix configure test for OpenSSH engineDarren Tucker
support. Patch from andrew.benham at thus net.
2006-09-2420060924Tim Rice
- (tim) [configure.ac] Remove CFLAGS hack for UnixWare 1.x/2.x (added to rev 1.308) to work around broken gcc 2.x header file.