Impact

A vulnerability in trestle-auth versions 0.4.0 and 0.4.1 allows an attacker to create a form that will bypass Rails' built-in CSRF protection when submitted by a victim with a trestle-auth admin session. This potentially allows an attacker to alter protected data, including admin account credentials.

Patches

The vulnerability has been fixed in trestle-auth 0.4.2 released to RubyGems.

For more information

If you have any questions or comments about this advisory:

• Open an issue in trestle-auth
• Email the maintainer at sam@sampohlenz.com

References

• GHSA-h8hx-2c5r-32cf
• TrestleAdmin/trestle-auth@cb95b05
• https://rubygems.org/gems/trestle-auth
• https://nvd.nist.gov/vuln/detail/CVE-2021-29435
• https://github.com/rubysec/ruby-advisory-db/blob/master/gems/trestle-auth/CVE-2021-29435.yml