{"id":"CVE-2011-3187","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header.","aliases":["GHSA-3vfw-7rcp-3xgm"],"modified":"2026-01-27T04:11:55.008055Z","published":"2011-08-29T18:55:01Z","withdrawn":"2026-01-27T04:11:55.008055Z","references":[{"type":"EVIDENCE","url":"http://webservsec.blogspot.com/2011/02/ruby-on-rails-vulnerability.html"},{"type":"EVIDENCE","url":"http://www.openwall.com/lists/oss-security/2011/08/22/14"},{"type":"EVIDENCE","url":"https://bugzilla.novell.com/show_bug.cgi?id=673010"},{"type":"FIX","url":"http://www.openwall.com/lists/oss-security/2011/08/17/1"},{"type":"FIX","url":"http://www.openwall.com/lists/oss-security/2011/08/19/11"},{"type":"FIX","url":"http://www.openwall.com/lists/oss-security/2011/08/20/1"},{"type":"FIX","url":"http://www.openwall.com/lists/oss-security/2011/08/22/13"},{"type":"FIX","url":"http://www.openwall.com/lists/oss-security/2011/08/22/5"},{"type":"WEB","url":"http://archives.neohapsis.com/archives/fulldisclosure/2011-02/0337.html"}],"schema_version":"1.7.3"}