[actionview] XSS Vulnerability in Action View tag helpers

There is a possible XSS vulnerability in Action View tag helpers. Passing
untrusted input as hash keys can lead to a possible XSS vulnerability. This
vulnerability has been assigned the CVE identifier CVE-2022-27777.

Versions Affected: ALL
Not affected: NONE
Fixed Versions: 7.0.2.4, 6.1.5.1, 6.0.4.8, 5.2.7.1

Impact

If untrusted data is passed as the hash key for tag attributes, there is a
possibility that the untrusted data may not be properly escaped which can
lead to an XSS vulnerability.

Impacted code will look something like this:

check_box_tag('thename', 'thevalue', false, aria: { malicious_input => 'thevalueofaria' })

Where the “malicious_input” variable contains untrusted data.

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

Releases

The FIXED releases are available at the normal locations.

Workarounds

Escape the untrusted data before using it as a key for tag helper methods.

References

• https://nvd.nist.gov/vuln/detail/CVE-2022-27777
• https://github.com/rails/rails/commit/649516ce0feb699ae06a8c5e81df75d460cc9a85
• https://github.com/rubysec/ruby-advisory-db/blob/master/gems/actionview/CVE-2022-27777.yml
• https://groups.google.com/g/ruby-security-ann/c/9wJPEDv-iRw
• https://rubyonrails.org/2022/4/26/Rails-7-0-2-4-6-1-5-1-6-0-4-8-and-5-2-7-1-have-been-released
• https://github.com/advisories/GHSA-ch3h-j2vf-95pv