Ruby on Rails 2.1 before 2.1.3 and 2.2.x before 2.2.2 does not verify tokens for requests with certain content types, which allows remote attackers to bypass cross-site request forgery (CSRF) protection for requests to applications that rely on this protection, as demonstrated using text/plain.

References

• https://nvd.nist.gov/vuln/detail/CVE-2008-7248
• https://access.redhat.com/security/cve/CVE-2008-7248
• https://bugzilla.redhat.com/show_bug.cgi?id=544329
• https://groups.google.com/group/rubyonrails-security/browse_thread/thread/d741ee286e36e301?hl=en
• https://lists.opensuse.org/opensuse-security-announce/2010-03/msg00004.html
• https://pseudo-flaw.net/content/web-browsers/form-data-encoding-roundup/
• https://weblog.rubyonrails.org/2008/11/18/potential-circumvention-of-csrf-protection-in-rails-2-1
• https://www.openwall.com/lists/oss-security/2009/11/28/1
• https://www.openwall.com/lists/oss-security/2009/12/02/2
• https://www.rorsecurity.info/journal/2008/11/19/circumvent-rails-csrf-protection.html
• https://github.com/rubysec/ruby-advisory-db/blob/master/gems/actionpack/CVE-2008-7248.yml
• http://groups.google.com/group/rubyonrails-security/browse_thread/thread/d741ee286e36e301?hl=en
• http://lists.opensuse.org/opensuse-security-announce/2010-03/msg00004.html
• http://pseudo-flaw.net/content/web-browsers/form-data-encoding-roundup/
• http://weblog.rubyonrails.org/2008/11/18/potential-circumvention-of-csrf-protection-in-rails-2-1
• http://www.openwall.com/lists/oss-security/2009/11/28/1
• http://www.openwall.com/lists/oss-security/2009/12/02/2
• rails/rails@099a98e
• https://web.archive.org/web/20090906010200/https://www.vupen.com/english/advisories/2009/2544