ruby: fix CVE-2020-25613

(From OE-Core rev: 80077479fd687a887cd321fe2e65dfd58edb5832)

Signed-off-by: Chee Yang Lee <chee.yang.lee@intel.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/ruby/ruby/CVE-2020-25613.patch

@@ -0,0 +1,40 @@
+From 8946bb38b4d87549f0d99ed73c62c41933f97cc7 Mon Sep 17 00:00:00 2001
+From: Yusuke Endoh <mame@ruby-lang.org>
+Date: Tue, 29 Sep 2020 13:15:58 +0900
+Subject: [PATCH] Make it more strict to interpret some headers
+
+Some regexps were too tolerant.
+
+Upstream-Status: Backport
+[https://github.com/ruby/webrick/commit/8946bb38b4d87549f0d99ed73c62c41933f97cc7]
+CVE: CVE-2020-25613
+Signed-off-by: Chee Yang Lee <chee.yang.lee@intel.com>
+---
+ lib/webrick/httprequest.rb | 6 +++---
+ 1 file changed, 3 insertions(+), 3 deletions(-)
+
+diff --git a/lib/webrick/httprequest.rb b/lib/webrick/httprequest.rb
+index 294bd91..d34eac7 100644
+--- a/lib/webrick/httprequest.rb
++++ b/lib/webrick/httprequest.rb
+@@ -227,9 +227,9 @@ def parse(socket=nil)
+         raise HTTPStatus::BadRequest, "bad URI `#{@unparsed_uri}'."
+       end
+ 
+-      if /close/io =~ self["connection"]
++      if /\Aclose\z/io =~ self["connection"]
+         @keep_alive = false
+-      elsif /keep-alive/io =~ self["connection"]
++      elsif /\Akeep-alive\z/io =~ self["connection"]
+         @keep_alive = true
+       elsif @http_version < "1.1"
+         @keep_alive = false
+@@ -508,7 +508,7 @@ def read_body(socket, block)
+       return unless socket
+       if tc = self['transfer-encoding']
+         case tc
+-        when /chunked/io then read_chunked(socket, block)
++        when /\Achunked\z/io then read_chunked(socket, block)
+         else raise HTTPStatus::NotImplemented, "Transfer-Encoding: #{tc}."
+         end
+       elsif self['content-length'] || @remaining_size

meta/recipes-devtools/ruby/ruby_2.7.1.bb

@@ -6,6 +6,7 @@ SRC_URI += " \
            file://remove_has_include_macros.patch \
            file://run-ptest \
            file://0001-Modify-shebang-of-libexec-y2racc-and-libexec-racc2y.patch \
+           file://CVE-2020-25613.patch \
            "
 
 SRC_URI[md5sum] = "debb9c325bf65021214451660f46e909"