Package Instance

Actionpack Open Redirect Vulnerability
The Host Authorization middleware in Action Pack before 6.1.2.1, 6.0.3.5 suffers from an open redirect vulnerability. Specially crafted `Host` headers in combination with certain "allowed host" formats can cause the Host Authorization middleware in Action Pack to redirect users to a malicious website.

rails-ujs vulnerable to DOM Based Cross-site Scripting contenteditable HTML Elements
NOTE: rails-ujs is part of Rails/actionview since 5.1.0.

There is a potential DOM based cross-site scripting issue in rails-ujs
which leverages the Clipboard API to target HTML elements that are
assigned the contenteditable attribute. This has the potential to
occur when pasting malicious HTML content from the clipboard that
includes a data-method, data-remote or data-disable-with attribute.

This vulnerability has been assigned the CVE identifier CVE-2023-23913.

Not affected: < 5.1.0
Versions Affected: >= 5.1.0
Fixed Versions: 6.1.7.3, 7.0.4.3

Impact
If the specified malicious HTML clipboard content is provided to a
contenteditable element, this could result in the arbitrary execution
of javascript on the origin in question.

Releases
The FIXED releases are available at the normal locations.

Workarounds
We recommend that all users upgrade to one of the FIXED versions.
In the meantime, users can attempt to mitigate this vulnerability
by removing the contenteditable attribute from elements in pages
that rails-ujs will interact with.

Patches
To aid users who aren’t able to upgrade immediately we have provided
patches for the two supported release series. They are in git-am
format and consist of a single changeset.

* rails-ujs-data-method-contenteditable-6-1.patch - Patch for 6.1 series
* rails-ujs-data-method-contenteditable-7-0.patch - Patch for 7.0 series

Please note that only the 7.0.Z and 6.1.Z series are
supported at present, and 6.0.Z for severe vulnerabilities.

Users of earlier unsupported releases are advised to upgrade as
soon as possible as we cannot guarantee the continued availability
of security fixes for unsupported releases.

Credits
We would like to thank ryotak 15 for reporting this!

* rails-ujs-data-method-contenteditable-6-1.patch (8.5 KB)
* rails-ujs-data-method-contenteditable-7-0.patch (8.5 KB)
* rails-ujs-data-method-contenteditable-main.patch (8.9 KB)

URL Redirection to Untrusted Site ('Open Redirect')
A possible open redirect vulnerability in the Host Authorization middleware in Action Pack >= 6.0.0 that could allow attackers to redirect users to a malicious website.

XSS via posted select tag options
Ruby on Rails is vulnerable to remote cross-site scripting because the application does not validate manually generated `select tag options` upon submission to `actionpack/lib/action_view/helpers/form_options_helper.rb`. This may allow a user to create a specially crafted request that would execute arbitrary script code in a user's browser within the trust relationship between their browser and the server.

Possible XSS Security Vulnerability in SafeBuffer#bytesplice
There is a vulnerability in ActiveSupport if the new bytesplice method is called on a SafeBuffer with untrusted user input.
This vulnerability has been assigned the CVE identifier CVE-2023-28120.

Versions Affected: All. Not affected: None Fixed Versions: 7.0.4.3, 6.1.7.3

# Impact

ActiveSupport uses the SafeBuffer string subclass to tag strings as html_safe after they have been sanitized.
When these strings are mutated, the tag is should be removed to mark them as no longer being html_safe.

Ruby 3.2 introduced a new bytesplice method which ActiveSupport does not yet understand to be a mutation.
Users on older versions of Ruby are likely unaffected.

All users running an affected release and using bytesplice should either upgrade or use one of the workarounds immediately.

# Workarounds

Avoid calling bytesplice on a SafeBuffer (html_safe) string with untrusted user input.

URL Redirection to Untrusted Site ('Open Redirect')
A open redirect vulnerability exists in Action Pack >= 6.0.0 that could allow an attacker to craft a "X-Forwarded-Host" headers in combination with certain "allowed host" formats can cause the Host Authorization middleware in Action Pack to redirect users to a malicious website.