CVE-2011-3187 actionpack Improper Input Validation vulnerability
Remote attackers can inject arbitrary text into logs or bypass address parsing via crafted X-Forwarded-For headers in Ruby on Rails.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2011-3187?
CVE-2011-3187 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
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.
Weakness: CWE-20
Which versions are affected by CVE-2011-3187?
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-2011-3187?
Upgrade actionpack to 2.3.13 or later.
Is CVE-2011-3187 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2011-3187 exists.
Public exploit code: 1 Exploit-DB entry.
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-2011-3187, GHSA-3vfw-7rcp-3xgm.