CVE-2009-3287
lib/thin/connection.rb in Thin web server before 1.2.4 relies on the X-Forwarded-For header to determine the IP address of the client, which allows remote attackers to spoof the IP address and hide activities via a modified X-Forwarded-For header.
Date published : 2009-09-22
http://github.com/macournoyer/thin/blob/master/CHANGELOG
http://github.com/macournoyer/thin/commit/7bd027914c5ffd36bb408ef47dc749de3b6e063a