CVE-2011-3187

Name	CVE-2011-3187
Description	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.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
rails (PTS)	bullseye (security), bullseye	2:6.0.3.7+dfsg-2+deb11u2	vulnerable
	bookworm	2:6.1.7.3+dfsg-2~deb12u1	vulnerable
	sid, trixie	2:6.1.7.3+dfsg-4	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
rails	source	(unstable)	(unfixed)	unimportant

X-Forwarded-For header is user supplied (like User-Agent)