Merge 6.7p1.

  * New upstream release (http://www.openssh.com/txt/release-6.7):
    - sshd(8): The default set of ciphers and MACs has been altered to
      remove unsafe algorithms.  In particular, CBC ciphers and arcfour* are
      disabled by default.  The full set of algorithms remains available if
      configured explicitly via the Ciphers and MACs sshd_config options.
    - ssh(1), sshd(8): 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 (closes: #236718).
    - ssh(1), ssh-keygen(1): Add support for SSHFP DNS records for ED25519
      key types.
    - sftp(1): Allow resumption of interrupted uploads.
    - ssh(1): When rekeying, skip file/DNS lookups of the hostkey if it is
      the same as the one sent during initial key exchange.
    - sshd(8): Allow explicit ::1 and 127.0.0.1 forwarding bind addresses
      when GatewayPorts=no; allows client to choose address family.
    - sshd(8): Add a sshd_config PermitUserRC option to control whether
      ~/.ssh/rc is executed, mirroring the no-user-rc authorized_keys
      option.
    - ssh(1): Add a %C escape sequence for LocalCommand and ControlPath that
      expands to a unique identifer based on a hash of the tuple of (local
      host, remote user, hostname, port).  Helps avoid exceeding miserly
      pathname limits for Unix domain sockets in multiplexing control paths.
    - sshd(8): Make the "Too many authentication failures" message include
      the user, source address, port and protocol in a format similar to the
      authentication success / failure messages.
    - Use CLOCK_BOOTTIME in preference to CLOCK_MONOTONIC when it is
      available. It considers time spent suspended, thereby ensuring
      timeouts (e.g. for expiring agent keys) fire correctly (closes:
      #734553).
    - Use prctl() to prevent sftp-server from accessing
      /proc/self/{mem,maps}.
  * Restore TCP wrappers support, removed upstream in 6.7.  It is true that
    dropping this reduces preauth attack surface in sshd.  On the other
    hand, this support seems to be quite widely used, and abruptly dropping
    it (from the perspective of users who don't read openssh-unix-dev) could
    easily cause more serious problems in practice.  It's not entirely clear
    what the right long-term answer for Debian is, but it at least probably
    doesn't involve dropping this feature shortly before a freeze.
  * Replace patch to disable OpenSSL version check with an updated version
    of Kurt Roeckx's patch from #732940 to just avoid checking the status
    field.

1 files changed, 159 insertions, 35 deletions

diff --git a/sshd_config.5 b/sshd_config.5
index 90fd3f4a8..7aa7b4733 100644
--- a/sshd_config.5
+++ b/sshd_config.5
@@ -33,8 +33,8 @@
 .\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 .\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 .\"
-.\" $OpenBSD: sshd_config.5,v 1.172 2014/02/27 22:47:07 djm Exp $
-.Dd $Mdocdate: February 27 2014 $
+.\" $OpenBSD: sshd_config.5,v 1.176 2014/07/28 15:40:08 schwarze Exp $
+.Dd $Mdocdate: July 28 2014 $
 .Dt SSHD_CONFIG 5
 .Os
 .Sh NAME
@@ -165,6 +165,26 @@ The default is
 Note that disabling TCP forwarding does not improve security unless
 users are also denied shell access, as they can always install their
 own forwarders.
+.It Cm AllowStreamLocalForwarding
+Specifies whether StreamLocal (Unix-domain socket) forwarding is permitted.
+The available options are
+.Dq yes
+or
+.Dq all
+to allow StreamLocal forwarding,
+.Dq no
+to prevent all StreamLocal forwarding,
+.Dq local
+to allow local (from the perspective of
+.Xr ssh 1 )
+forwarding only or
+.Dq remote
+to allow remote forwarding only.
+The default is
+.Dq yes .
+Note that disabling StreamLocal forwarding does not improve security unless
+users are also denied shell access, as they can always install their
+own forwarders.
 .It Cm AllowUsers
 This keyword can be followed by a list of user name patterns, separated
 by spaces.
@@ -348,9 +368,9 @@ For file transfer sessions using
 .Dq sftp ,
 no additional configuration of the environment is necessary if the
 in-process sftp server is used,
-though sessions which use logging do require
+though sessions which use logging may require
 .Pa /dev/log
-inside the chroot directory (see
+inside the chroot directory on some operating systems (see
 .Xr sftp-server 8
 for details).
 .Pp
@@ -361,30 +381,44 @@ Specifies the ciphers allowed for protocol version 2.
 Multiple ciphers must be comma-separated.
 The supported ciphers are:
 .Pp
-.Dq 3des-cbc ,
-.Dq aes128-cbc ,
-.Dq aes192-cbc ,
-.Dq aes256-cbc ,
-.Dq aes128-ctr ,
-.Dq aes192-ctr ,
-.Dq aes256-ctr ,
-.Dq aes128-gcm@openssh.com ,
-.Dq aes256-gcm@openssh.com ,
-.Dq arcfour128 ,
-.Dq arcfour256 ,
-.Dq arcfour ,
-.Dq blowfish-cbc ,
-.Dq cast128-cbc ,
-and
-.Dq chacha20-poly1305@openssh.com .
+.Bl -item -compact -offset indent
+.It
+3des-cbc
+.It
+aes128-cbc
+.It
+aes192-cbc
+.It
+aes256-cbc
+.It
+aes128-ctr
+.It
+aes192-ctr
+.It
+aes256-ctr
+.It
+aes128-gcm@openssh.com
+.It
+aes256-gcm@openssh.com
+.It
+arcfour
+.It
+arcfour128
+.It
+arcfour256
+.It
+blowfish-cbc
+.It
+cast128-cbc
+.It
+chacha20-poly1305@openssh.com
+.El
 .Pp
 The default is:
-.Bd -literal -offset 3n
-aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,
+.Bd -literal -offset indent
+aes128-ctr,aes192-ctr,aes256-ctr,
 aes128-gcm@openssh.com,aes256-gcm@openssh.com,
-chacha20-poly1305@openssh.com,
-aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,
-aes256-cbc,arcfour
+chacha20-poly1305@openssh.com
 .Ed
 .Pp
 The list of available ciphers may also be obtained using the
@@ -729,14 +763,33 @@ The default is
 .It Cm KexAlgorithms
 Specifies the available KEX (Key Exchange) algorithms.
 Multiple algorithms must be comma-separated.
-The default is
+The supported algorithms are:
+.Pp
+.Bl -item -compact -offset indent
+.It
+curve25519-sha256@libssh.org
+.It
+diffie-hellman-group1-sha1
+.It
+diffie-hellman-group14-sha1
+.It
+diffie-hellman-group-exchange-sha1
+.It
+diffie-hellman-group-exchange-sha256
+.It
+ecdh-sha2-nistp256
+.It
+ecdh-sha2-nistp384
+.It
+ecdh-sha2-nistp521
+.El
+.Pp
+The default is:
 .Bd -literal -offset indent
 curve25519-sha256@libssh.org,
 ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,
 diffie-hellman-group-exchange-sha256,
-diffie-hellman-group-exchange-sha1,
-diffie-hellman-group14-sha1,
-diffie-hellman-group1-sha1
+diffie-hellman-group14-sha1
 .Ed
 .It Cm KeyRegenerationInterval
 In protocol version 1, the ephemeral server key is automatically regenerated
@@ -808,16 +861,53 @@ The algorithms that contain
 .Dq -etm
 calculate the MAC after encryption (encrypt-then-mac).
 These are considered safer and their use recommended.
+The supported MACs are:
+.Pp
+.Bl -item -compact -offset indent
+.It
+hmac-md5
+.It
+hmac-md5-96
+.It
+hmac-ripemd160
+.It
+hmac-sha1
+.It
+hmac-sha1-96
+.It
+hmac-sha2-256
+.It
+hmac-sha2-512
+.It
+umac-64@openssh.com
+.It
+umac-128@openssh.com
+.It
+hmac-md5-etm@openssh.com
+.It
+hmac-md5-96-etm@openssh.com
+.It
+hmac-ripemd160-etm@openssh.com
+.It
+hmac-sha1-etm@openssh.com
+.It
+hmac-sha1-96-etm@openssh.com
+.It
+hmac-sha2-256-etm@openssh.com
+.It
+hmac-sha2-512-etm@openssh.com
+.It
+umac-64-etm@openssh.com
+.It
+umac-128-etm@openssh.com
+.El
+.Pp
 The default is:
 .Bd -literal -offset indent
-hmac-md5-etm@openssh.com,hmac-sha1-etm@openssh.com,
 umac-64-etm@openssh.com,umac-128-etm@openssh.com,
 hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,
-hmac-ripemd160-etm@openssh.com,hmac-sha1-96-etm@openssh.com,
-hmac-md5-96-etm@openssh.com,
-hmac-md5,hmac-sha1,umac-64@openssh.com,umac-128@openssh.com,
-hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,
-hmac-sha1-96,hmac-md5-96
+umac-64@openssh.com,umac-128@openssh.com,
+hmac-sha2-256,hmac-sha2-512
 .Ed
 .It Cm Match
 Introduces a conditional block.
@@ -899,6 +989,7 @@ Available keywords are
 .Cm PermitRootLogin ,
 .Cm PermitTTY ,
 .Cm PermitTunnel ,
+.Cm PermitUserRC ,
 .Cm PubkeyAuthentication ,
 .Cm RekeyLimit ,
 .Cm RhostsRSAAuthentication ,
@@ -1047,6 +1138,12 @@ The default is
 Enabling environment processing may enable users to bypass access
 restrictions in some configurations using mechanisms such as
 .Ev LD_PRELOAD .
+.It Cm PermitUserRC
+Specifies whether any
+.Pa ~/.ssh/rc
+file is executed.
+The default is
+.Dq yes .
 .It Cm PidFile
 Specifies the file that contains the process ID of the
 SSH daemon.
@@ -1151,6 +1248,33 @@ This option applies to protocol version 1 only.
 .It Cm ServerKeyBits
 Defines the number of bits in the ephemeral protocol version 1 server key.
 The minimum value is 512, and the default is 1024.
+.It Cm StreamLocalBindMask
+Sets the octal file creation mode mask
+.Pq umask
+used when creating a Unix-domain socket file for local or remote
+port forwarding.
+This option is only used for port forwarding to a Unix-domain socket file.
+.Pp
+The default value is 0177, which creates a Unix-domain socket file that is
+readable and writable only by the owner.
+Note that not all operating systems honor the file mode on Unix-domain
+socket files.
+.It Cm StreamLocalBindUnlink
+Specifies whether to remove an existing Unix-domain socket file for local
+or remote port forwarding before creating a new one.
+If the socket file already exists and
+.Cm StreamLocalBindUnlink
+is not enabled,
+.Nm sshd
+will be unable to forward the port to the Unix-domain socket file.
+This option is only used for port forwarding to a Unix-domain socket file.
+.Pp
+The argument must be
+.Dq yes
+or
+.Dq no .
+The default is
+.Dq no .
 .It Cm StrictModes
 Specifies whether
 .Xr sshd 8