From bd3f0c442c082b7b8d855f46386c9087bc755dc6 Mon Sep 17 00:00:00 2001
From: Chris Roberts <code@chrisroberts.org>
Date: Fri, 11 Nov 2016 14:50:20 -0800
Subject: [PATCH] Only use Gem sources that are provided

---
 lib/vagrant/bundler.rb        | 12 ++++++------
 lib/vagrant/plugin/manager.rb |  2 +-
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/lib/vagrant/bundler.rb b/lib/vagrant/bundler.rb
index c6c19da87..24031cb37 100644
--- a/lib/vagrant/bundler.rb
+++ b/lib/vagrant/bundler.rb
@@ -139,14 +139,15 @@ module Vagrant
     #
     # @param [String] path Path to a local gem file.
     # @return [Gem::Specification]
-    def install_local(path)
+    def install_local(path, opts={})
       plugin_source = Gem::Source::SpecificFile.new(path)
       plugin_info = {
         plugin_source.spec.name => {
-          'local_source' => plugin_source
+          "local_source" => plugin_source,
+          "sources" => opts.fetch(:sources, Gem.sources.map(&:to_s))
         }
       }
-      internal_install(plugin_info, {}, local_install: true)
+      internal_install(plugin_info, {})
       plugin_source.spec
     end
 
@@ -223,9 +224,8 @@ module Vagrant
     protected
 
     def internal_install(plugins, update, **extra)
-
-      # Only clear Gem sources if not performing local install
-      Gem.sources.clear if !extra[:local_install]
+      # Only allow defined Gem sources
+      Gem.sources.clear
 
       update = {} unless update.is_a?(Hash)
       installer_set = Gem::Resolver::InstallerSet.new(:both)
diff --git a/lib/vagrant/plugin/manager.rb b/lib/vagrant/plugin/manager.rb
index ca9be34c5..76ce74dcc 100644
--- a/lib/vagrant/plugin/manager.rb
+++ b/lib/vagrant/plugin/manager.rb
@@ -44,7 +44,7 @@ module Vagrant
         local = false
         if name =~ /\.gem$/
           # If this is a gem file, then we install that gem locally.
-          local_spec = Vagrant::Bundler.instance.install_local(name)
+          local_spec = Vagrant::Bundler.instance.install_local(name, opts)
           name       = local_spec.name
           opts[:version] = local_spec.version.to_s
         end