CVE-2022-23633

Exposure of information in Action Pack

Workarounds

Upgrading is highly recommended, but to work around this problem the following middleware can be used:

class GuardedExecutor < ActionDispatch::Executor
  def call(env)
    ensure_completed!
    super
  end

  private

    def ensure_completed!
      @executor.new.complete! if @executor.active?
    end
end

# Ensure the guard is inserted before ActionDispatch::Executor
Rails.application.configure do
  config.middleware.swap ActionDispatch::Executor, GuardedExecutor, executor
end

Under certain circumstances response bodies will not be closed, for example a bug in a webserver or a bug in a Rack middleware. In the event a response is not notified of a close, ActionDispatch::Executor will not know to reset thread local state for the next request. This can lead to data being leaked to subsequent requests, especially when interacting with ActiveSupport::CurrentAttributes.

Upgrading to the FIXED versions of Rails will ensure mitigation of this issue even in the context of a buggy webserver or middleware implementation.

CVE-2022-23633 has a CVSS score of 7.4 (High). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (5.2.6.2, 6.0.4.6, 6.1.4.6, 7.0.2.2); upgrading removes the vulnerable code path.

Kodem intelligence

Already deployed Kodem?

This has been fixed in Rails 7.0.2.2, 6.1.4.6, 6.0.4.6, and 5.2.6.2.

1. What is CVE-2022-23633? CVE-2022-23633 is a high-severity security vulnerability in actionpack (rubygems), affecting versions >= 5.0.0.0, <= 5.2.6.1. It is fixed in 5.2.6.2, 6.0.4.6, 6.1.4.6, 7.0.2.2.
2. How severe is CVE-2022-23633? CVE-2022-23633 has a CVSS score of 7.4 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
3. Which versions of actionpack are affected by CVE-2022-23633? actionpack (rubygems) versions >= 5.0.0.0, <= 5.2.6.1 is affected.
4. Is there a fix for CVE-2022-23633? Yes. CVE-2022-23633 is fixed in 5.2.6.2, 6.0.4.6, 6.1.4.6, 7.0.2.2. Upgrade to this version or later.
5. Is CVE-2022-23633 exploitable, and should I be worried? Whether CVE-2022-23633 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
6. What actually determines whether CVE-2022-23633 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
7. How do I fix CVE-2022-23633?
   • Upgrade actionpack to 5.2.6.2 or later
   • Upgrade actionpack to 6.0.4.6 or later
   • Upgrade actionpack to 6.1.4.6 or later
   • Upgrade actionpack to 7.0.2.2 or later

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