From b7a82ac6910ce87ba85562d267c30f679cb97de7 Mon Sep 17 00:00:00 2001
From: Holger Just <hjust@meine-er.de>
Date: Wed, 16 Jan 2013 23:24:15 +0100
Subject: [PATCH] Fix for CVE-2013-0155 in Rails

---
 config/initializers/10-patches.rb | 41 +++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/config/initializers/10-patches.rb b/config/initializers/10-patches.rb
index 217b6450..4613bf2e 100644
--- a/config/initializers/10-patches.rb
+++ b/config/initializers/10-patches.rb
@@ -152,6 +152,47 @@ module ActionController
   end
 end
 
+# Fix for CVE-2013-0155
+# https://groups.google.com/d/msg/rubyonrails-security/kKGNeMrnmiY/r2yM7xy-G48J
+# TODO: Remove this once we are on Rails >= 3.2.11
+module ActiveRecord
+  class Base
+    class << self
+    protected
+      def self.sanitize_sql_hash_for_conditions(attrs, default_table_name = quoted_table_name, top_level = true)
+        attrs = expand_hash_conditions_for_aggregates(attrs)
+
+        return '1 = 2' if !top_level && attrs.is_a?(Hash) && attrs.empty?
+
+        conditions = attrs.map do |attr, value|
+          table_name = default_table_name
+
+          if not value.is_a?(Hash)
+            attr = attr.to_s
+
+            # Extract table name from qualified attribute names.
+            if attr.include?('.') and top_level
+              attr_table_name, attr = attr.split('.', 2)
+              attr_table_name = connection.quote_table_name(attr_table_name)
+            else
+              attr_table_name = table_name
+            end
+
+            attribute_condition("#{attr_table_name}.#{connection.quote_column_name(attr)}", value)
+          elsif top_level
+            sanitize_sql_hash_for_conditions(value, connection.quote_table_name(attr.to_s), false)
+          else
+            raise ActiveRecord::StatementInvalid
+          end
+        end.join(' AND ')
+
+        replace_bind_variables(conditions, expand_range_bind_variables(attrs.values))
+      end
+      alias_method :sanitize_sql_hash, :sanitize_sql_hash_for_conditions
+    end
+  end
+end
+
 # Backported fix for CVE-2012-3465
 # https://groups.google.com/d/msg/rubyonrails-security/FgVEtBajcTY/tYLS1JJTu38J
 # TODO: Remove this once we are on Rails >= 3.2.8