CVE-2022-23634 Information Exposure when using Puma with Rails
Attackers can access leaked information due to improper response body closure in Puma when used with Rails, requiring an upgrade to patched versions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2022-23634?
CVE-2022-23634 is a high-severity vulnerability in Debian Debian Linux, published on 11 Feb 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Puma is a Ruby/Rack web server built for parallelism. Prior to `puma` version `5.6.2`, `puma` may not always call `close` on the response body. Rails, prior to version `7.0.2.2`, depended on the response body being closed in order for its `CurrentAttributes` implementation to work correctly. The combination of these two behaviors (Puma not closing the body + Rails' Executor implementation) causes information leakage. This problem is fixed in Puma versions 5.6.2 and 4.3.11. This problem is fixed in Rails versions 7.02.2, 6.1.4.6, 6.0.4.6, and 5.2.6.2. Upgrading to a patched Rails _or_ Puma version fixes the vulnerability.
Which versions are affected by CVE-2022-23634?
4 open source packages ship an affected version, including puma. It affects 4 products.
| Package | Affected | Fixed in |
|---|---|---|
puma RubyGems | All versions | 4.3.11 |
puma RubyGems | All versions | 4.3.11 |
puma RubyGems | From 5.0.0 | 5.6.2 |
puma RubyGems | From 5.0.0 | 5.6.2 |
Products include Debian Debian Linux, Fedoraproject Fedora, Puma Puma, Rubyonrails Rails.
How do I fix CVE-2022-23634?
Upgrade puma to a fixed version for your release line: 4.3.11 or 5.6.2.
Is CVE-2022-23634 being exploited?
There is no known exploitation of CVE-2022-23634 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DEBIAN-CVE-2022-23634, GHSA-rmj8-8hhh-gv5h, OESA-2024-1002, OESA-2024-1003, OESA-2024-1004, OESA-2024-1005 and 2 more.