November 8, 2013 advisory:

       http://www.openssh.org/txt/gcmrekey.adv

Apply by doing:
       cd /usr/src
       patch -p0 < 002_sshgcm.patch

Then build new sshd binaries:

       cd /usr/src/usr.bin/ssh
       make obj
       make
       make install

Then restart sshd:

       /etc/rc.d/sshd restart

Index: usr.bin/ssh/monitor_wrap.c
===================================================================
RCS file: /cvs/src/usr.bin/ssh/monitor_wrap.c,v
retrieving revision 1.76
diff -u -p -u -r1.76 monitor_wrap.c
--- usr.bin/ssh/monitor_wrap.c  17 May 2013 00:13:13 -0000      1.76
+++ usr.bin/monitor_wrap.c      6 Nov 2013 16:31:26 -0000
@@ -469,7 +469,7 @@ mm_newkeys_from_blob(u_char *blob, int b
       buffer_init(&b);
       buffer_append(&b, blob, blen);

-       newkey = xmalloc(sizeof(*newkey));
+       newkey = xcalloc(1, sizeof(*newkey));
       enc = &newkey->enc;
       mac = &newkey->mac;
       comp = &newkey->comp;