[Security] Bump activesupport from 4.2.1 to 4.2.11.3

[dependabot-preview]

Bumps activesupport from 4.2.1 to 4.2.11.3. 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

Release notes

Sourced from activesupport's releases.

4.2.11.3

Action Mailer

• No changes.

Action Pack

• No changes.

Action View

• Backport a missing commit for [CVE-2020-8163]

Active Job

• No changes.

Active Model

• No changes.

Active Record

• No changes.

Active Support

• No changes.

Railties

• No changes.

4.2.11.2

Action Mailer

Commits

• 3231120 prepping for release
• 1f3db0a Merge pull request #39302 from dustym/add-delegation_reserved_method_names
• b9e5577 Preparing for 4.2.11.2 release
• 9855d05 Bumping version for release
• e06a1e0 Prep release
• 474b739 Preparing for 4.2.11 release
• 759d41d Backport fix for Dir::Tmpname.create from #32386
• 7fe69ea Add missing require for remove_possible_method
• 6b9a1ac Update changelog headers for Rails 4.2.10
• b62714d Preparing for 4.2.10 release
• Additional commits viewable in compare view

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