From $URL: Various methods in WEBrick::HTTPRequest in Ruby 1.9.2-p290 and 1.8.7-p352 and earlier and do not validate the X-Forwarded-For, X-Forwarded-Host and X-Forwarded-Server headers in requests, which might allow remote attackers to inject arbitrary text into log files or bypass intended address parsing via a crafted header. https://redmine.ruby-lang.org/issues/5418
No vulnerable versions in tree. References as CVE is still reerved: https://security-tracker.debian.org/tracker/CVE-2011-3624 https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-3624