[Security] Bump actionview from 4.2.10 to 4.2.11.3

[dependabot-preview]

Bumps actionview from 4.2.10 to 4.2.11.3. This update includes security fixes.

Vulnerabilities fixed

Sourced from The Ruby Advisory Database.

Potential remote code execution of user-provided local names in ActionView There was a vulnerability in versions of Rails prior to 5.0.1 that would allow an attacker who controlled the locals argument of a render call.

Versions Affected: rails < 5.0.1 Not affected: Applications that do not allow users to control the names of locals. Fixed Versions: 4.2.11.2

Impact

In the scenario where an attacker might be able to control the name of a local passed into render, they can acheive remote code execution.

Workarounds

Until such time as the patch can be applied, application developers should ensure that all user-provided local names are alphanumeric.

Patched versions: >= 4.2.11.2 Unaffected versions: none

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: >= 4.0.0, <= 4.2.11

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: >= 4.0.0, <= 4.2.11

Sourced from The Ruby Advisory Database.

Denial of Service Vulnerability in Action View There is a potential denial of service vulnerability in actionview. This vulnerability has been assigned the CVE identifier CVE-2019-5419.

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.

Workarounds

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

class UserController < ApplicationController
  def index
</tr></table> ... (truncated)
Patched versions: >= 6.0.0.beta3; ~> 5.2.2, >= 5.2.2.1; ~> 5.1.6, >= 5.1.6.2; ~> 5.0.7, >= 5.0.7.2; ~> 4.2.11, >= 4.2.11.1
Unaffected versions: none

Sourced from The Ruby Advisory Database.

File Content Disclosure in Action View There is a possible file content disclosure vulnerability in Action View. This vulnerability has been assigned the CVE identifier CVE-2019-5418.

Versions Affected: All. Not affected: None. Fixed Versions: 6.0.0.beta3, 5.2.2.1, 5.1.6.2, 5.0.7.2, 4.2.11.1

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
</tr></table> ... (truncated)
Patched versions: ~> 4.2.11, >= 4.2.11.1; ~> 5.0.7, >= 5.0.7.2; ~> 5.1.6, >= 5.1.6.2; ~> 5.2.2, >= 5.2.2.1; >= 6.0.0.beta3
Unaffected versions: none

Commits

• 3231120 prepping for release
• b9e5577 Preparing for 4.2.11.2 release
• 9855d05 Bumping version for release
• 4c46a15 Restrict which local names can be eval'd
• e06a1e0 Prep release
• 474b739 Preparing for 4.2.11 release
• 718d739 Fix test_should_sanitize_illegal_style_properties failure
• See full diff in compare view

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