components/network/openssh/patches/0101-unregister-kexinit-handler.patch

   1 From ec165c392ca54317dbe3064a8c200de6531e89ad Mon Sep 17 00:00:00 2001
   2 From: "markus@openbsd.org" <markus@openbsd.org>
   3 Date: Mon, 10 Oct 2016 19:28:48 +0000
   4 Subject: [PATCH] upstream commit
   5
   6 Unregister the KEXINIT handler after message has been
   7 received. Otherwise an unauthenticated peer can repeat the KEXINIT and cause
   8 allocation of up to 128MB -- until the connection is closed. Reported by
   9 shilei-c at 360.cn
  10
  11 Upstream-ID: 43649ae12a27ef94290db16d1a98294588b75c05
  12 ---
  13  kex.c | 3 ++-
  14  1 file changed, 2 insertions(+), 1 deletion(-)
  15
  16 diff --git a/kex.c b/kex.c
  17 index 3f97f8c..6a94bc5 100644
  18 --- a/kex.c
  19 +++ b/kex.c
  20 @@ -477,6 +477,7 @@
  21         if (kex == NULL)
  22                 return SSH_ERR_INVALID_ARGUMENT;
  23
  24 +       ssh_dispatch_set(ssh, SSH2_MSG_KEXINIT, NULL);
  25         ptr = sshpkt_ptr(ssh, &dlen);
  26         if ((r = sshbuf_put(kex->peer, ptr, dlen)) != 0)
  27                 return r;