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Check attributes passed to create_with and where

If the request parameters are passed to create_with and where they can
be used to do mass assignment when used in combination with
Relation#create.

Fixes CVE-2014-3514
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rafaelfranca committed Aug 7, 2014
1 parent 31e9229 commit d4d00185bb5ec31ee2ff23009491d01502952b8d
@@ -23,5 +23,6 @@ def sanitize_for_mass_assignment(attributes)
attributes
end
end
+ alias :sanitize_forbidden_attributes :sanitize_for_mass_assignment
end
end
@@ -1,9 +1,12 @@
require 'active_support/core_ext/array/wrap'
+require 'active_model/forbidden_attributes_protection'
module ActiveRecord
module QueryMethods
extend ActiveSupport::Concern
+ include ActiveModel::ForbiddenAttributesProtection
+
# WhereChain objects act as placeholder for queries in which #where does not have any parameter.
# In this case, #where must be chained with #not to return a new relation.
class WhereChain
@@ -540,7 +543,10 @@ def where!(opts = :chain, *rest) # :nodoc:
if opts == :chain
WhereChain.new(self)
else
- references!(PredicateBuilder.references(opts)) if Hash === opts
+ if Hash === opts
+ opts = sanitize_forbidden_attributes(opts)
+ references!(PredicateBuilder.references(opts))
+ end
self.where_values += build_where(opts, rest)
self
@@ -678,7 +684,13 @@ def create_with(value)
end
def create_with!(value) # :nodoc:
- self.create_with_value = value ? create_with_value.merge(value) : {}
+ if value
+ value = sanitize_forbidden_attributes(value)
+ self.create_with_value = create_with_value.merge(value)
+ else
+ self.create_with_value = {}
+ end
+
self
end
@@ -61,4 +61,34 @@ def test_regular_hash_should_still_be_used_for_mass_assignment
assert_equal 'Guille', person.first_name
assert_equal 'm', person.gender
end
+
+ def test_create_with_checks_permitted
+ params = ProtectedParams.new(first_name: 'Guille', gender: 'm')
+
+ assert_raises(ActiveModel::ForbiddenAttributesError) do
+ Person.create_with(params).create!
+ end
+ end
+
+ def test_create_with_works_with_params_values
+ params = ProtectedParams.new(first_name: 'Guille')
+
+ person = Person.create_with(first_name: params[:first_name]).create!
+ assert_equal 'Guille', person.first_name
+ end
+
+ def test_where_checks_permitted
+ params = ProtectedParams.new(first_name: 'Guille', gender: 'm')
+
+ assert_raises(ActiveModel::ForbiddenAttributesError) do
+ Person.where(params).create!
+ end
+ end
+
+ def test_where_works_with_params_values
+ params = ProtectedParams.new(first_name: 'Guille')
+
+ person = Person.where(first_name: params[:first_name]).create!
+ assert_equal 'Guille', person.first_name
+ end
end

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