CVE-2024-21636: view_component Cross-site Scripting vulnerability
First published: Thu Jan 04 2024(Updated: )
### Impact _What kind of vulnerability is it? Who is impacted?_ This is an XSS vulnerability that has the potential to impact anyone rendering a component directly from a controller with the view_component gem. Note that only components that define a [`#call` method](https://viewcomponent.org/guide/templates.html#call) (i.e. instead of using a sidecar template) are affected. The return value of the `#call` method is not sanitized and can include user-defined content. In addition, the return value of the [`#output_postamble` method](https://viewcomponent.org/api.html#output_postamble--string) is not sanitized, which can also lead to XSS issues. ### Patches _Has the problem been patched? What versions should users upgrade to?_ Versions 3.9.0 has been released and fully mitigates both the `#call` and the `#output_postamble` vulnerabilities. ### Workarounds _Is there a way for users to fix or remediate the vulnerability without upgrading?_ Sanitize the return value of `#call`, eg: ```ruby class MyComponent < ApplicationComponent def call html_escape("<div>#{user_input}</div>") end end ``` ### References _Are there any links users can visit to find out more?_ https://github.com/ViewComponent/view_component/pull/1950 ### For more information If you have any questions or comments about this advisory: Open an issue in the [github/view_component](https://github.com/github/view_component) project.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| rubygems/view_component | <3.9.0 | 3.9.0 |
| rubygems/view_component | <2.83.0 | 2.83.0 |
| rubygems/view_component | >=3.0.0<3.9.0 | 3.9.0 |
| Viewcomponent | <2.83.0 | |
| Viewcomponent | >=3.0.0<3.9.0 |
Remedy
https://github.com/ViewComponent/view_component/commit/0d26944a8d2730ea40e60eae23d70684483e5017
Remedy
https://github.com/ViewComponent/view_component/commit/c43d8bafa7117cbce479669a423ab266de150697
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Reference Links
- https://github.com/ViewComponent/view_component/security/advisories/GHSA-wf2x-8w6j-qw37
- https://nvd.nist.gov/vuln/detail/CVE-2024-21636
- https://github.com/ViewComponent/view_component/pull/1950
- https://github.com/ViewComponent/view_component/commit/0d26944a8d2730ea40e60eae23d70684483e5017
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/view_component/CVE-2024-21636.yml
- https://github.com/ViewComponent/view_component/pull/1962
- https://github.com/ViewComponent/view_component/commit/c43d8bafa7117cbce479669a423ab266de150697
- https://github.com/advisories/GHSA-wf2x-8w6j-qw37 (Advisory)
Frequently Asked Questions
What is the severity of CVE-2024-21636?
CVE-2024-21636 is classified as a Cross-Site Scripting (XSS) vulnerability that can severely impact the security of applications rendering components directly from the view_component gem.
Who is affected by CVE-2024-21636?
CVE-2024-21636 affects any application using the view_component gem that directly renders components with a defined #call method.
How do I fix CVE-2024-21636?
To fix CVE-2024-21636, update the view_component gem to version 2.83.0 or any version above 3.9.0.
What are the potential consequences of CVE-2024-21636?
Exploitation of CVE-2024-21636 can lead to unauthorized execution of scripts in the context of the affected web application, compromising user data and session integrity.
Is CVE-2024-21636 similar to other vulnerabilities?
CVE-2024-21636 is similar to other XSS vulnerabilities in that it allows attackers to inject malicious scripts into web pages viewed by other users.
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