gnu: ruby: Replace with 3.1.7.

Fixes: CVE-2024-27280 (Buffer overread vulnerability in StringIO),
CVE-2024-27281 (RCE vulnerability with .rdoc_options in RDoc),
CVE-2024-27282 (Arbitrary memory address read vulnerability with Regex
search), CVE-2025-27219 (Denial of Service in CGI::Cookie.parse)
CVE-2025-27220 (ReDoS in CGI::Util#escapeElement), and
CVE-2025-27221 (userinfo leakage in URI#join, URI#merge and URI#+).

* gnu/packages/ruby.scm (ruby-3.1.7): New variable.
(ruby-3.1)[replacement]: Replace with ruby-3.1.7.

Change-Id: I9c4758f4622d5844cc9a23c2865a3d0210a4ebae
Signed-off-by: Christopher Baines <mail@cbaines.net>

gnu/packages/ruby.scm

@@ -29,7 +29,7 @@
 ;;; Copyright © 2020 Tomás Ortín Fernández <tomasortin@mailbox.org>
 ;;; Copyright © 2021 Giovanni Biscuolo <g@xelera.eu>
 ;;; Copyright © 2022 Philip McGrath <philip@philipmcgrath.com>
-;;; Copyright © 2022-2024 Remco van 't Veer <remco@remworks.net>
+;;; Copyright © 2022-2025 Remco van 't Veer <remco@remworks.net>
 ;;; Copyright © 2022 Taiju HIGASHI <higashi@taiju.info>
 ;;; Copyright © 2023 Yovan Naumovski <yovan@gorski.stream>
 ;;; Copyright © 2023, 2024 gemmaro <gemmaro.dev@gmail.com>
@@ -250,6 +250,7 @@ a focus on simplicity and productivity.")
   (package
     (inherit ruby-3.0)
     (version "3.1.4")
+    (replacement ruby-3.1.7)
     (source
      (origin
        (method url-fetch)
@@ -260,6 +261,22 @@ a focus on simplicity and productivity.")
         (base32
          "0kzr792rk9n9yrqlyrkc1a0cmbk5y194f7v7p4vwjdk0ww860v8v"))))))
 
++;;; TODO: This newer version resolves serveral CVEs.  Remove
++;;; after ungrafting ruby.
+(define ruby-3.1.7
+  (package
+    (inherit ruby-3.1)
+    (version "3.1.7")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "http://cache.ruby-lang.org/pub/ruby/"
+                           (version-major+minor version)
+                           "/ruby-" version ".tar.xz"))
+       (sha256
+        (base32
+         "0ddhh3nzfnwwb0ks3rsmf3w1m71ban30wf61djn8gnkbbd2wr2k5"))))))
+
 (define-public ruby-3.2
   (package
     (inherit ruby-3.1)