GHSA-3vfw-7rcp-3xgm

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GHSA-3vfw-7rcp-3xgm

Summary: actionpack Improper Input Validation vulnerability

Details: The `to_s` method in `actionpack/lib/action_dispatch/middleware/remote_ip.rb` in Ruby on Rails 3.0.5 does not validate the X-Forwarded-For header in requests from IP addresses on a Class C network, which might allow remote attackers to inject arbitrary text into log files or bypass intended address parsing via a crafted header.

References: https://nvd.nist.gov/vuln/detail/CVE-2011-3187, https://bugzilla.novell.com/show_bug.cgi?id=673010, https://github.com/rails/rails, https://github.com/rubysec/ruby-advisory-db/blob/master/gems/actionpack/CVE-2011-3187.yml, https://web.archive.org/web/20111209181000/http://archives.neohapsis.com/archives/fulldisclosure/2011-02/0337.html, http://webservsec.blogspot.com/2011/02/ruby-on-rails-vulnerability.html, http://www.openwall.com/lists/oss-security/2011/08/17/1, http://www.openwall.com/lists/oss-security/2011/08/19/11, http://www.openwall.com/lists/oss-security/2011/08/20/1, http://www.openwall.com/lists/oss-security/2011/08/22/13, http://www.openwall.com/lists/oss-security/2011/08/22/14, http://www.openwall.com/lists/oss-security/2011/08/22/5