CVE-2011-3186

Severity: medium (CVSS 4.3 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2011-08-29 · updated 2026-06-16
Weakness: CWE-94

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.

Affected products

Ruby on Rails: 2.3.2, 2.3.3, 2.3.4, 2.3.9, 2.3.10, 2.3.11 (+1)

References

http://groups.google.com/group/rubyonrails-security/msg/bbe342e43abaa78c?dmode=source&output=gplain
http://lists.fedoraproject.org/pipermail/package-announce/2011-September/065137.html
http://secunia.com/advisories/45921
http://www.debian.org/security/2011/dsa-2301
http://www.openwall.com/lists/oss-security/2011/08/17/1
http://www.openwall.com/lists/oss-security/2011/08/19/11
http://www.openwall.com/lists/oss-security/2011/08/20/1
http://www.openwall.com/lists/oss-security/2011/08/22/13
http://www.openwall.com/lists/oss-security/2011/08/22/14
http://www.openwall.com/lists/oss-security/2011/08/22/5
https://bugzilla.redhat.com/show_bug.cgi?id=732156
https://github.com/rails/rails/commit/11dafeaa7533be26441a63618be93a03869c83a9

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