Cross-site scripting in Ruby on Rails

1) Cross-site scripting

EUVDB-ID: #VU116160

Risk: Medium

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:L/SI:L/SA:N/E:U/U:Green]

CVE-ID: CVE-2012-3465

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

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.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Ruby on Rails: 3.0.0.beta - 3.2.7 rc1

CPE2.3

• cpe:2.3:a:rails:ruby_on_rails:3.0.16:*:*:*:*:*:*:*
• cpe:2.3:a:rails:ruby_on_rails:3.1.7:*:*:*:*:*:*:*
• cpe:2.3:a:rails:ruby_on_rails:3.2.7:rc1:*:*:*:*:*:*

External links

https://rhn.redhat.com/errata/RHSA-2013-0154.html
https://secunia.com/advisories/50694
https://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

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.