openssh/openssh-7.2p2-X11_trusted_forwarding.patch

# HG changeset patch
# Parent  7197d7a6b7c90566c68e980b5f8b937c183e79d0
# enable trusted X11 forwarding by default in both sshd and sshsystem-wide
# configuration
# bnc#50836 (was suse #35836)
Enable Trusted X11 forwarding by default, since the security benefits of
having it disabled are negligible these days with XI2 being widely used.

diff --git a/openssh-7.2p2/ssh_config b/openssh-7.2p2/ssh_config
--- a/openssh-7.2p2/ssh_config
+++ b/openssh-7.2p2/ssh_config
@@ -12,19 +12,30 @@
 # Any configuration value is only changed the first time it is set.
 # Thus, host-specific definitions should be at the beginning of the
 # configuration file, and defaults at the end.
 
 # Site-wide defaults for some commonly used options.  For a comprehensive
 # list of available options, their meanings and defaults, please see the
 # ssh_config(5) man page.
 
-# Host *
+Host *
 #   ForwardAgent no
 #   ForwardX11 no
+
+# If you do not trust your remote host (or its administrator), you
+# should not forward X11 connections to your local X11-display for
+# security reasons: Someone stealing the authentification data on the
+# remote side (the "spoofed" X-server by the remote sshd) can read your
+# keystrokes as you type, just like any other X11 client could do.
+# Set this to "no" here for global effect or in your own ~/.ssh/config
+# file if you want to have the remote X11 authentification data to 
+# expire after twenty minutes after remote login.
+    ForwardX11Trusted yes
+
 #   RhostsRSAAuthentication no
 #   RSAAuthentication yes
 #   PasswordAuthentication yes
 #   HostbasedAuthentication no
 #   GSSAPIAuthentication no
 #   GSSAPIDelegateCredentials no
 #   BatchMode no
 #   CheckHostIP yes
diff --git a/openssh-7.2p2/sshd_config b/openssh-7.2p2/sshd_config
--- a/openssh-7.2p2/sshd_config
+++ b/openssh-7.2p2/sshd_config
@@ -94,17 +94,17 @@ AuthorizedKeysFile	.ssh/authorized_keys
 # If you just want the PAM account and session checks to run without
 # PAM authentication, then enable this but set PasswordAuthentication
 # and ChallengeResponseAuthentication to 'no'.
 #UsePAM no
 
 #AllowAgentForwarding yes
 #AllowTcpForwarding yes
 #GatewayPorts no
-#X11Forwarding no
+X11Forwarding yes
 #X11DisplayOffset 10
 #X11UseLocalhost yes
 #PermitTTY yes
 #PrintMotd yes
 #PrintLastLog yes
 #TCPKeepAlive yes
 #UseLogin no
 #UsePrivilegeSeparation sandbox