actionpack/lib/action_dispatch/routing/route_set.rb in Action Pack in Ruby on Rails 4.x before 4.2.5.1 and 5.x before 5.0.0.beta1.1 allows remote attackers to cause a denial of service (superfluous caching and memory consumption) by leveraging an application's use of a wildcard controller route.

References

• https://nvd.nist.gov/vuln/detail/CVE-2015-7581
• https://groups.google.com/forum/message/raw?msg=ruby-security-ann/dthJ5wL69JE/IdvCimtZEgAJ
• http://lists.fedoraproject.org/pipermail/package-announce/2016-February/178043.html
• http://lists.fedoraproject.org/pipermail/package-announce/2016-February/178067.html
• http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00053.html
• http://lists.opensuse.org/opensuse-updates/2016-02/msg00043.html
• http://rhn.redhat.com/errata/RHSA-2016-0296.html
• http://www.debian.org/security/2016/dsa-3464
• http://www.openwall.com/lists/oss-security/2016/01/25/16
• https://github.com/rubysec/ruby-advisory-db/blob/master/gems/actionpack/CVE-2015-7581.yml
• https://groups.google.com/forum/#!topic/rubyonrails-security/dthJ5wL69JE
• https://web.archive.org/web/20200228001849/http://www.securityfocus.com/bid/81677
• https://web.archive.org/web/20200516093752/http://www.securitytracker.com/id/1034816