CVE-2009-1904
The BigDecimal library in Ruby 1.8.6 before p369 and 1.8.7 before p173 allows context-dependent attackers to cause a denial of service (application crash) via a string argument that represents a large number, as demonstrated by an attempted conversion to the Float data type.
Date published : 2009-06-11
http://lists.apple.com/archives/security-announce/2010//Mar/msg00001.html