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Gentoo Linux Security Advisory                           GLSA 202408-24
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: Ruby on Rails: Remote Code Execution
     Date: August 11, 2024
     Bugs: #857840
       ID: 202408-24

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Synopsis
========

A vulnerability has been discovered in Ruby on Rails, which can lead to
remote code execution via serialization of data.

Background
==========

Ruby on Rails is a free web framework used to develop database-driven
web applications.

Affected packages
=================

Package         Vulnerable     Unaffected
--------------  -------------  --------------
dev-ruby/rails  < 6.1.6.1:6.1  >= 6.1.6.1:6.1
                < 7.0.3.1:7.0  >= 7.0.3.1:7.0

Description
===========

Multiple vulnerabilities have been discovered in Ruby on Rails. Please
review the CVE identifiers referenced below for details.

Impact
======

When serialized columns that use YAML (the default) are deserialized,
Rails uses YAML.unsafe_load to convert the YAML data in to Ruby objects.
If an attacker can manipulate data in the database (via means like SQL
injection), then it may be possible for the attacker to escalate to an
RCE.

Impacted Active Record models will look something like this:

class User < ApplicationRecord
  serialize :options       # Vulnerable: Uses YAML for serialization
  serialize :values, Array # Vulnerable: Uses YAML for serialization
  serialize :values, JSON  # Not vulnerable
end

The released versions change the default YAML deserializer to use
YAML.safe_load, which prevents deserialization of possibly dangerous
objects. This may introduce backwards compatibility issues with existing
data.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All Ruby on Rails users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=dev-ruby/rails-6.1.6.1:6.1"
  # emerge --ask --oneshot --verbose ">=dev-ruby/rails-7.0.3.1:7.0"

References
==========

[ 1 ] CVE-2022-32224
      https://nvd.nist.gov/vuln/detail/CVE-2022-32224

Availability
============

This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:

 https://security.gentoo.org/glsa/202408-24

Concerns?
=========

Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users' machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
https://bugs.gentoo.org.

License
=======

Copyright 2024 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).

The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.

https://creativecommons.org/licenses/by-sa/2.5
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