[Security] Bump activesupport from 4.1.4 to 4.1.16

[dependabot-preview]

Bumps activesupport from 4.1.4 to 4.1.16. This update includes security fixes.

Vulnerabilities fixed

Sourced from The Ruby Advisory Database.

Possible Denial of Service attack in Active Support 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.

Patched versions: >= 4.2.2; ~> 4.1.11; ~> 3.2.22 Unaffected versions: none

Sourced from The Ruby Advisory Database.

XSS Vulnerability in ActiveSupport::JSON.encode When a Hash containing user-controlled data is encode as JSON (either through Hash#to_json or ActiveSupport::JSON.encode), Rails does not perform adequate escaping that matches the guarantee implied by the escape_html_entities_in_json option (which is enabled by default). If this resulting JSON string is subsequently inserted directly into an HTML page, the page will be vulnerable to XSS attacks.

For example, the following code snippet is vulnerable to this attack:

Similarly, the following is also vulnerable:

All applications that renders JSON-encoded strings that contains user-controlled data in their views should either upgrade to one of the FIXED versions or use the suggested workaround immediately.

Workarounds

Patched versions: >= 4.2.2; ~> 4.1.11 Unaffected versions: < 4.1.0

Commits

• d880330 Preparing for 4.1.16 release
• 871d63e Preparing for 4.1.16.rc1 release
• d5c4b82 Preparing for 4.1.15 release
• 06d2bfd Preparing for 4.1.15.rc1 release
• c016607 Merge branch '4-1-14' into 4-1-stable
• 4cffd33 Preparing for 4.1.14.2 release
• 7921ff8 Merge branch '4-1-sec' into 4-1-stable
• 31ab3aa bumping version
• 50d3d7d Eliminate instance level writers for class accessors
• 859ca44 use secure string comparisons for basic auth username / password
• Additional commits viewable in compare view

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