gnu: openssh: Update to 7.4p1.

* gnu/packages/ssh.scm (openssh): Update to 7.4p1.
[source]: Remove 'openssh-memory-exhaustion.patch'.
* gnu/packages/patches/openssh-memory-exhaustion.patch: Delete file.
* gnu/local.mk (dist_patch_DATA): Remove it.

gnu/local.mk

@@ -752,7 +752,6 @@ dist_patch_DATA =						\
   %D%/packages/patches/openjpeg-CVE-2016-9850-CVE-2016-9851.patch		\
   %D%/packages/patches/openjpeg-use-after-free-fix.patch	\
   %D%/packages/patches/openocd-nrf52.patch			\
-  %D%/packages/patches/openssh-memory-exhaustion.patch		\
   %D%/packages/patches/openssl-runpath.patch			\
   %D%/packages/patches/openssl-1.1.0-c-rehash-in.patch		\
   %D%/packages/patches/openssl-c-rehash-in.patch		\

gnu/packages/patches/openssh-memory-exhaustion.patch

@@ -1,39 +0,0 @@
-Fix a memory exhaustion bug in the key exchange, whereby an unauthenticated user
-could potentially consume 38400 MB of memory on the server:
-
-http://seclists.org/oss-sec/2016/q4/185
-
-Patch adapted from upstream source repository:
-
-https://github.com/openssh/openssh-portable/commit/ec165c392ca54317dbe3064a8c200de6531e89ad
-
-From ec165c392ca54317dbe3064a8c200de6531e89ad Mon Sep 17 00:00:00 2001
-From: "markus@openbsd.org" <markus@openbsd.org>
-Date: Mon, 10 Oct 2016 19:28:48 +0000
-Subject: [PATCH] upstream commit
-
-Unregister the KEXINIT handler after message has been
-received. Otherwise an unauthenticated peer can repeat the KEXINIT and cause
-allocation of up to 128MB -- until the connection is closed. Reported by
-shilei-c at 360.cn
-
-Upstream-ID: 43649ae12a27ef94290db16d1a98294588b75c05
----
- kex.c | 3 ++-
- 1 file changed, 2 insertions(+), 1 deletion(-)
-
-diff --git a/kex.c b/kex.c
-index 3f97f8c..6a94bc5 100644
---- a/kex.c
-+++ b/kex.c
-@@ -481,6 +481,7 @@ kex_input_kexinit(int type, u_int32_t seq, void *ctxt)
- 	if (kex == NULL)
- 		return SSH_ERR_INVALID_ARGUMENT;
- 
-+	ssh_dispatch_set(ssh, SSH2_MSG_KEXINIT, NULL);
- 	ptr = sshpkt_ptr(ssh, &dlen);
- 	if ((r = sshbuf_put(kex->peer, ptr, dlen)) != 0)
- 		return r;
--- 
-2.10.1
-

gnu/packages/ssh.scm

@@ -112,7 +112,7 @@ a server that supports the SSH-2 protocol.")
 (define-public openssh
   (package
    (name "openssh")
-   (version "7.3p1")
+   (version "7.4p1")
    (source (origin
             (method url-fetch)
             (uri (let ((tail (string-append name "-" version ".tar.gz")))
@@ -122,9 +122,8 @@ a server that supports the SSH-2 protocol.")
                                         tail)
                          (string-append "http://ftp2.fr.openbsd.org/pub/OpenBSD/OpenSSH/portable/"
                                         tail))))
-            (patches (search-patches "openssh-memory-exhaustion.patch"))
             (sha256 (base32
-                     "1k5y1wi29d47cgizbryxrhc1fbjsba2x8l5mqfa9b9nadnd9iyrz"))))
+                     "1l8r3x4fr2kb6xm95s7kjdif1wp6f94d4kljh4qjj9109shw87qv"))))
    (build-system gnu-build-system)
    (inputs `(("groff" ,groff)
              ("openssl" ,openssl)