CVE-2013-0269 rubygem-json: Denial of Service and SQL Injection

The JSON gem before 1.5.5, 1.6.x before 1.6.8, and 1.7.x before 1.7.7
for Ruby allows remote attackers to cause a denial of service (resource consumption)
or bypass the mass assignment protection mechanism via a crafted JSON document that
triggers the creation of arbitrary Ruby symbols or certain internal objects, as
demonstrated by conducting a SQL injection attack against Ruby on Rails, aka “Unsafe
Object Creation Vulnerability.”