CVE-2011-3186 actionpack CRLF injection vulnerability
Remote attackers can inject HTTP headers and split responses via the Content-Type header in Ruby on Rails applications.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2011-3186?
CVE-2011-3186 is a medium-severity vulnerability in Rubyonrails Rails, published on 29 Aug 2011. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-94
Which versions are affected by CVE-2011-3186?
2 open source packages ship an affected version, including actionpack. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
actionpack RubyGems | From 2.3.0 | 2.3.13 |
actionpack RubyGems | From 2.3.0 | 2.3.13 |
Products include Rubyonrails Rails.
How do I fix CVE-2011-3186?
Upgrade actionpack to 2.3.13 or later.
Is CVE-2011-3186 being exploited?
There is no known exploitation of CVE-2011-3186 in the wild and no public exploit code.
Other vulnerabilities in Rubyonrails Rails
- CVE-2013-0277 Active Record contains deserialization of arbitrary YAML
- CVE-2017-17916 SQL injection in n/a
- CVE-2017-17917 SQL injection in n/a
- CVE-2026-33195 Rails Active Storage has possible Path Traversal in DiskService
- CVE-2024-26142 Rails possible ReDoS vulnerability in Accept header parsing in Action Dispatch
Sources
Also known as DEBIAN-CVE-2011-3186, GHSA-fcqf-h4h4-695m.