ADVISORIES
GEM
FRAMEWORK
PATCHED VERSIONS
- >= 4.2.2
- ~> 4.1.11
- ~> 3.2.22
DESCRIPTION
Specially crafted XML documents can cause applications to raise a
SystemStackError and potentially cause a denial of service attack. This
only impacts applications using REXML or JDOM as their XML processor. Other
XML processors that Rails supports are not impacted.
All users running an affected release should either upgrade or use one of the work arounds immediately.
Workarounds
Use an XML parser that is not impacted by this problem, such as Nokogiri or LibXML. You can change the processor like this:
ActiveSupport::XmlMini.backend = ‘Nokogiri’
If you cannot change XML parsers, then adjust
RUBY_THREAD_MACHINE_STACK_SIZE.