VULNERABILITY INTELLIGENCE

CVE-2011-3187

CVSS score4.3 MEDIUM
EPSS probability6.67%
CISA KEVNot currently listed
Published2011-08-29
Last modified2026-06-16
CVSS vectorAV:N/AC:M/Au:N/C:N/I:P/A:N

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 classification

  • CWE-20: Improper Input Validation

Primary references