CVE-2022-23634: Information Exposure when using Puma with Rails
First published: Fri Feb 11 2022(Updated: )
### Impact 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. From Rails: > Under certain circumstances response bodies will not be closed, for example a bug in a webserver[1] 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. The combination of these two behaviors (Puma not closing the body + Rails' Executor implementation) causes information leakage. ### Patches 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. See: https://github.com/advisories/GHSA-wh98-p28r-vrc9 for details about the rails vulnerability Upgrading to a patched Rails _or_ Puma version fixes the vulnerability. ### Workarounds Upgrade to Rails versions 7.02.2, 6.1.4.6, 6.0.4.6, and 5.2.6.2. The [Rails CVE](https://groups.google.com/g/ruby-security-ann/c/FkTM-_7zSNA/m/K2RiMJBlBAAJ?utm_medium=email&utm_source=footer&pli=1) includes a middleware that can be used instead. ### References * Rails CVE: [CVE-2022-23633](https://groups.google.com/g/ruby-security-ann/c/FkTM-_7zSNA/m/K2RiMJBlBAAJ?utm_medium=email&utm_source=footer&pli=1) ### For more information If you have any questions or comments about this advisory: * Open an issue in [puma](https://github.com/puma/puma) * See our [security policy](https://github.com/puma/puma/security/policy)
Credit: security-advisories@github.com security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/tfm-rubygem-puma | <0:5.6.2-1.el7 | 0:5.6.2-1.el7 |
| redhat/rubygem-puma | <0:5.6.2-1.el8 | 0:5.6.2-1.el8 |
| Puma Puma | <4.3.11 | |
| Puma Puma | >=5.0.0<5.6.2 | |
| Rubyonrails Rails | >=5.0.0<5.2.6.2 | |
| Rubyonrails Rails | >=6.0.0<6.0.4.6 | |
| Rubyonrails Rails | >=6.1.0<6.1.4.6 | |
| Rubyonrails Rails | >=7.0.0<7.0.2.2 | |
| Debian Debian Linux | =9.0 | |
| Debian Debian Linux | =10.0 | |
| Debian Debian Linux | =11.0 | |
| Fedoraproject Fedora | =35 | |
| Fedoraproject Fedora | =36 | |
| Fedoraproject Fedora | =37 | |
| rubygems/puma | <4.3.11 | 4.3.11 |
| rubygems/puma | >=5.0.0<5.6.2 | 5.6.2 |
| redhat/rubygem-puma | <5.6.2 | 5.6.2 |
| redhat/rubygem-puma | <4.3.11 | 4.3.11 |
| redhat/rubygem-rails | <7.02.2 | 7.02.2 |
| redhat/rubygem-rails | <6.1.4.6 | 6.1.4.6 |
| redhat/rubygem-rails | <6.0.4.6 | 6.0.4.6 |
| redhat/rubygem-rails | <5.2.6.2 | 5.2.6.2 |
| ubuntu/puma | <3.12.4-1ubuntu2+ | 3.12.4-1ubuntu2+ |
| ubuntu/puma | <5.5.2-2ubuntu2+ | 5.5.2-2ubuntu2+ |
| debian/puma | <=3.12.0-2+deb10u2<=4.3.8-1 | 3.12.0-2+deb10u3 4.3.8-1+deb11u2 5.6.5-3 6.4.2-4 |
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2022-23634 https://nvd.nist.gov/vuln/detail/CVE-2022-23634 https://github.com/advisories/GHSA-rmj8-8hhh-gv5h
- https://bugzilla.redhat.com/show_bug.cgi?id=2054211
- https://access.redhat.com/errata/RHSA-2022:5498
- https://access.redhat.com/security/cve/cve-2022-23634
- https://github.com/advisories/GHSA-rmj8-8hhh-gv5h (Advisory)
- https://github.com/advisories/GHSA-wh98-p28r-vrc9
- https://github.com/puma/puma/commit/b70f451fe8abc0cff192c065d549778452e155bb
- https://github.com/puma/puma/security/advisories/GHSA-rmj8-8hhh-gv5h
- https://groups.google.com/g/ruby-security-ann/c/FkTM-_7zSNA/m/K2RiMJBlBAAJ?utm_medium=email&utm_source=footer&pli=1
- https://lists.debian.org/debian-lts-announce/2022/05/msg00034.html
- https://lists.debian.org/debian-lts-announce/2022/08/msg00015.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/F6YWGIIKL7KKTS3ZOAYMYPC7D6WQ5OA5/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/L7NESIBFCNSR3XH7LXDPKVMSUBNUB43G/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TUBFJ44NCKJ34LECZRAP4N5VL6USJSIB/
- https://security.gentoo.org/glsa/202208-28
- https://www.debian.org/security/2022/dsa-5146
- https://nvd.nist.gov/vuln/detail/CVE-2022-23634
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/puma/CVE-2022-23634.yml
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F6YWGIIKL7KKTS3ZOAYMYPC7D6WQ5OA5/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L7NESIBFCNSR3XH7LXDPKVMSUBNUB43G/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TUBFJ44NCKJ34LECZRAP4N5VL6USJSIB/
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2054212
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2054213
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2054211#c0
- https://groups.google.com/g/ruby-security-ann/c/FkTM-_7zSNA/m/K2RiMJBlBAAJ?utm_medium=email&utm_source=footer&pli=1
- https://launchpad.net/bugs/cve/CVE-2022-23634
- https://security-tracker.debian.org/tracker/CVE-2022-23634
- https://ubuntu.com/security/notices/USN-6682-1
- https://www.cve.org/CVERecord?id=CVE-2022-23634
- https://ubuntu.com/security/CVE-2022-23634
Frequently Asked Questions
What is CVE-2022-23634?
CVE-2022-23634 is a vulnerability found in Puma and Rails rubygems that allows the response body to remain unclosed under certain situations.
What is the impact of CVE-2022-23634?
The vulnerability impacts Puma versions prior to 5.6.2 and Rails versions prior to 7.0.2.2, causing the response body to not be closed properly and affecting Rails' CurrentAttributes implementation.
How can I fix CVE-2022-23634?
To fix CVE-2022-23634, ensure that you are using Puma version 5.6.2 or later and Rails version 7.0.2.2 or later.
What is the severity of CVE-2022-23634?
CVE-2022-23634 has a severity rating of high.
Where can I find more information about CVE-2022-23634?
You can find more information about CVE-2022-23634 on CVE.org, NVD, GitHub, Red Hat Bugzilla, and Red Hat Access.
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