SB2012081001 - Cross-site scripting in Ruby on Rails

Description

This security bulletin contains information about 1 security vulnerability.

1) Cross-site scripting (CVE-ID: CVE-2012-3465)

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data in actionpack/lib/action_view/helpers/sanitize_helper.rb in the strip_tags helper in Ruby on Rails. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Remediation

Install update from vendor's website.

References

• http://rhn.redhat.com/errata/RHSA-2013-0154.html
• http://secunia.com/advisories/50694
• http://weblog.rubyonrails.org/2012/8/9/ann-rails-3-2-8-has-been-released/
• https://groups.google.com/group/rubyonrails-security/msg/7fbb5392d4d282b5?dmode=source&output=gplain