[Security] Bump rails from 5.2.2 to 5.2.4.3

[dependabot-preview]

Bumps rails from 5.2.2 to 5.2.4.3. This update includes security fixes.

Vulnerabilities fixed

Sourced from The GitHub Security Advisory Database.

Critical severity vulnerability that affects actionview

Denial of Service Vulnerability in Action View

Impact

Specially crafted accept headers can cause the Action View template location code to consume 100% CPU, causing the server unable to process requests. This impacts all Rails applications that render views.

All users running an affected release should either upgrade or use one of the workarounds immediately.

Releases

The 6.0.0.beta3, 5.2.2.1, 5.1.6.2, 5.0.7.2, and 4.2.11.1 releases are available at the normal locations.

Workarounds

This vulnerability can be mitigated by wrapping render calls with respond_to blocks. For example, the following example is vulnerable:

... (truncated)

Affected versions: >= 5.2.0, <= 5.2.2

Sourced from The GitHub Security Advisory Database.

High severity vulnerability that affects actionview

File Content Disclosure in Action View

Impact

There is a possible file content disclosure vulnerability in Action View. Specially crafted accept headers in combination with calls to render file: can cause arbitrary files on the target server to be rendered, disclosing the file contents.

The impact is limited to calls to render which render file contents without a specified accept format. Impacted code in a controller looks something like this:

class UserController < ApplicationController 
  def index 
    render file: "#{Rails.root}/some/file" 
  end 
end 

... (truncated)

Affected versions: >= 5.2.0, <= 5.2.2

Sourced from The GitHub Security Advisory Database.

Moderate severity vulnerability that affects railties

Possible Remote Code Execution Exploit in Rails Development Mode

Impact

With some knowledge of a target application it is possible for an attacker to guess the automatically generated development mode secret token. This secret token can be used in combination with other Rails internals to escalate to a remote code execution exploit.

All users running an affected release should either upgrade or use one of the workarounds immediately.

Releases

The 6.0.0.beta3 and 5.2.2.1 releases are available at the normal locations.

Workarounds

This issue can be mitigated by specifying a secret key in development mode. In "config/environments/development.rb" add this:

... (truncated)

Affected versions: >= 5.2.0, <= 5.2.2

Release notes

Sourced from rails's releases.

5.2.4.2

Active Support

• No changes.

Active Model

• No changes.

Active Record

• No changes.

Action View

• Fix possible XSS vector in escape_javascript helper

  CVE-2020-5267

  Aaron Patterson

Action Pack

• No changes.

Active Job

• No changes.

Action Mailer

• No changes.

Action Cable

• No changes.

... (truncated)

Commits

• 7b5cc5a Preparing for 5.2.4.3 release
• 559cce2 updating changelog
• 3c806b9 bumping version
• 9cb66f6 update changelog
• fbc7bec Check that request is same-origin prior to including CSRF token in XHRs
• d124f19 HMAC raw CSRF token before masking it, so it cannot be used to reconstruct a ...
• 467e339 activesupport: Deprecate Marshal.load on raw cache read in RedisCacheStore
• f7e077f activesupport: Avoid Marshal.load on raw cache value in MemCacheStore
• 7a3ee4f Return self when calling #each, #each_pair, and #each_value instead of the ra...
• e8df564 Include Content-Length in signature for ActiveStorage direct upload
• Additional commits viewable in compare view

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[codecov-commenter]

Codecov Report

Merging #604 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master      #604   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          399       399           
  Lines        10675     10675           
=========================================
  Hits         10675     10675           

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