actionpack Improper Input Validation vulnerability (GHSA-3vfw-7rcp-3xgm)
Published: 2017-10-24T18:33:38Z
Aliases: CVE-2011-3187
Severity: MODERATE · CWE: CWE-20

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.

Affected packages:
package: ecosystem: RubyGems
name: actionpack
ranges: type: ECOSYSTEM
events: introduced: 2.3.0
fixed: 2.3.13