The Show In Browser (show_in_browser) gem 0.0.3 for Ruby allows local users to inject arbitrary web script or HTML via a symlink attack on /tmp/browser.html.

References

• https://nvd.nist.gov/vuln/detail/CVE-2013-2105
• https://exchange.xforce.ibmcloud.com/vulnerabilities/84378
• GHSA-9hx9-w2j6-rw76
• http://vapid.dhs.org/advisories/show_in_browser.html
• http://www.openwall.com/lists/oss-security/2013/05/18/4
• https://github.com/rubysec/ruby-advisory-db/blob/master/gems/show_in_browser/CVE-2013-2105.yml