--- /dev/null
+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