CVE-2012-2660

actionpack/lib/action_dispatch/http/request.rb in Ruby on Rails before
3.0.13, 3.1.x before 3.1.5, and 3.2.x before 3.2.4 does not properly
consider differences in parameter handling between the Active Record
component and the Rack interface, which allows remote attackers to bypass
intended database-query restrictions and perform NULL checks via a crafted
request, as demonstrated by certain “[nil]” values, a related issue to
CVE-2012-2694.
There is a vulnerability when Active Record is used in conjunction with
parameter parsing from Rack via Action Pack.

Notes