rails-html-sanitizer up to 1.6.0 Rails::HTML::Sanitizer cross site scripting

Summaryinfo

A vulnerability identified as problematic has been detected in rails-html-sanitizer up to 1.6.0. Affected by this vulnerability is the function Rails::HTML::Sanitizer. The manipulation leads to cross site scripting. This vulnerability is referenced as CVE-2024-53985. Remote exploitation of the attack is possible. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in rails-html-sanitizer up to 1.6.0. This issue affects the function Rails::HTML::Sanitizer. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. The summary by CVE is:

rails-html-sanitizer is responsible for sanitizing HTML fragments in Rails applications. There is a possible XSS vulnerability with certain configurations of Rails::HTML::Sanitizer 1.6.0 when used with Rails >= 7.1.0 and Nokogiri < 1.15.7, or 1.16.x < 1.16.8. The XSS vulnerability with certain configurations of Rails::HTML::Sanitizer may allow an attacker to inject content if HTML5 sanitization is enabled and the application developer has overridden the sanitizer's allowed tags with both "math" and "style" elements or both both "svg" and "style" elements. This vulnerability is fixed in 1.6.1.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2024-53985 since 11/26/2024. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

Upgrading to version 1.6.1 eliminates this vulnerability. Applying the patch b0220b8850d52199a15f83c472d175a4122dd7b1 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Name

• rails-html-sanitizer

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6.0

License

• open-source

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