CVE-2022-23633 — Exposure of sensitive information in Action Pack

Affected: rails

Action Pack is a framework for handling and responding to web requests. Under certain circumstances response bodies will not be closed. 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.This has been fixed in Rails 7.0.2.1, 6.1.4.5, 6.0.4.5, and 5.2.6.1. Upgrading is highly recommended, but to work around this problem a middleware described in GHSA-wh98-p28r-vrc9 can be used.

GHSA-wh98-p28r-vrc9 — Exposure of information in Action Pack

Affected: RubyGems: actionpack

### Impact

Under certain circumstances response bodies will not be closed, for example a [bug in a webserver](https://github.com/puma/puma/pull/2812) 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.

### Patches

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

### Workarounds

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

```ruby 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 ```

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CVE-2022-23633 — Exposure of sensitive information in Action Pack

GHSA-wh98-p28r-vrc9 — Exposure of information in Action Pack