X-Forwarded-For Header Injection Vulnerability in Ruby on Rails 3.0.5

CVE-2011-3187 · MEDIUM Severity

AV:N/AC:M/AU:N/C:N/I:P/A:N

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.

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