[v3 1/2] gnu: libssh2: Update to 1.7.0 [fixes CVE-2016-0787].

[Leo Famulari <leo@famulari.name>]

* gnu/packages/ssh.scm (libssh2): Update to 1.7.0.
(libssh2-1.4): New variable.
* gnu/packages/curl.scm (curl)[inputs]: Temporarily specify dependency
on libssh2-1.4 while rebuilding.
---
 gnu/packages/curl.scm | 11 ++++++++++-
 gnu/packages/ssh.scm  | 28 ++++++++++++++++++++++++----
 2 files changed, 34 insertions(+), 5 deletions(-)

diff --git a/gnu/packages/curl.scm b/gnu/packages/curl.scm
index 222910b..42fb11f 100644
--- a/gnu/packages/curl.scm
+++ b/gnu/packages/curl.scm
@@ -54,7 +54,16 @@
    (inputs `(("gnutls" ,gnutls)
              ("gss" ,gss)
              ("libidn" ,libidn)
-             ("libssh2" ,libssh2)
+
+             ;; libssh2-1.4 is for temporary use by curl, while all
+             ;; packages affected by CVE-2016-7087 are rebuilt. Once
+             ;; they are rebuilt, curl should be updated to use
+             ;; libssh2-1.7.0 (or whatever is current), and libssh2-1.4
+             ;; should be removed from the distribution.
+
+             ;; libssh2-1.4 is vulnerable to CVE-2016-0787.
+
+             ("libssh2" ,libssh2-1.4)
              ("openldap" ,openldap)
              ("zlib" ,zlib)))
    (native-inputs
diff --git a/gnu/packages/ssh.scm b/gnu/packages/ssh.scm
index d4bf29c..2b0693b 100644
--- a/gnu/packages/ssh.scm
+++ b/gnu/packages/ssh.scm
@@ -2,6 +2,7 @@
 ;;; Copyright © 2013, 2014 Andreas Enge <andreas@enge.fr>
 ;;; Copyright © 2014, 2015, 2016 Mark H Weaver <mhw@netris.org>
 ;;; Copyright © 2015 Efraim Flashner <efraim@flashner.co.il>
+;;; Copyright © 2016 Leo Famulari <leo@famulari.name>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -85,14 +86,15 @@ remote applications.")
 (define-public libssh2
   (package
    (name "libssh2")
-   (version "1.4.3")
+   (version "1.7.0")
    (source (origin
             (method url-fetch)
             (uri (string-append
-                   "http://www.libssh2.org/download/libssh2-"
+                   "https://www.libssh2.org/download/libssh2-"
                    version ".tar.gz"))
-            (sha256 (base32
-                     "0vdr478dbhbdgnniqmirawjb7mrcxckn4slhhrijxnzrkmgziipa"))))
+            (sha256
+             (base32
+              "116mh112w48vv9k3f15ggp5kxw5sj4b88dzb5j69llsh7ba1ymp4"))))
    (build-system gnu-build-system)
    ;; The installed libssh2.pc file does not include paths to libgcrypt and
    ;; zlib libraries, so we need to propagate the inputs.
@@ -108,6 +110,24 @@ a server that supports the SSH-2 protocol.")
    (license license:bsd-3)
    (home-page "http://www.libssh2.org/")))
 
+;;; This is a temporary package for use only by curl. Once we have
+;;; rebuilt all packages affected by CVE-2016-0787, this package should
+;;; be removed.
+;;;
+;;; This package is vulnerable to CVE-2016-7087.
+;;;
+;;; https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-0787
+(define-public libssh2-1.4
+  (package (inherit libssh2)
+    (version "1.4.3")
+    (source (origin
+             (method url-fetch)
+             (uri (string-append "https://www.libssh2.org/download/libssh2-"
+                                 version ".tar.gz"))
+             (sha256
+              (base32
+                "0vdr478dbhbdgnniqmirawjb7mrcxckn4slhhrijxnzrkmgziipa"))))))
+
 (define-public openssh
   (package
    (name "openssh")
-- 
2.7.1