actionpack CRLF injection vulnerability

MEDIUM 4.3CVE-2011-3186 · GHSA-fcqf-h4h4-695m · Published 29/08/2011 · updated 16/06/2026

Package	Affected versions	Patched versions
actionpack RubyGems	`≥ 2.3.0, < 2.3.13`	`2.3.13`
rails rubyonrails	`= 2.3.10= 2.3.11= 2.3.12= 2.3.2= 2.3.3= 2.3.4= 2.3.9`	No fix yet

Description

CRLF injection vulnerability in actionpack/lib/action_controller/response.rb in Ruby on Rails 2.3.x before 2.3.13 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via the Content-Type header.

NVD description

CRLF injection vulnerability in actionpack/lib/action_controller/response.rb in Ruby on Rails 2.3.x before 2.3.13 allows remote attackers to inject arbitrary HTTP headers and conduct HTTP response splitting attacks via the Content-Type header.

References

nvd.nist.gov/vuln/detail/CVE-2011-3186 · ADVISORY
rails/rails commit 11dafea · WEB
bugzilla.redhat.com/show_bug.cgi · WEB
rails/rails · PACKAGE
rubysec/ruby-advisory-db · WEB
groups.google.com/forum · WEB
web.archive.org/web/20150201000000*/http://secunia.com/advisories/45921 · WEB
groups.google.com/group/rubyonrails-security/msg/bbe342e43abaa78c · WEB
lists.fedoraproject.org/pipermail/package-announce/2011-September/065137.html · WEB
debian.org/security/2011/dsa-2301 · WEB
openwall.com/lists/oss-security/2011/08/17/1 · WEB
openwall.com/lists/oss-security/2011/08/19/11 · WEB
openwall.com/lists/oss-security/2011/08/20/1 · WEB
openwall.com/lists/oss-security/2011/08/22/13 · WEB
openwall.com/lists/oss-security/2011/08/22/14 · WEB
openwall.com/lists/oss-security/2011/08/22/5 · WEB
secunia.com/advisories/45921

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