CVE-2013-4164: ruby buffer overflow
Heap-based buffer overflow in Ruby 1.8, 1.9 before 1.9.3-p484, 2.0
before 2.0.0-p353, 2.1 before 2.1.0 preview2, and trunk before revision
43780 allows context-dependent attackers to cause a denial of service
(segmentation fault) and possibly execute arbitrary code via a string
that is converted to a floating point value, as demonstrated using
(1) the to_f method or (2) JSON.parse (CVE-2013-4164).
(from redmine: issue id 2461, created on 2013-12-03, closed on 2013-12-04)