CVE-2011-3187

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.

Read the notes from the security team

• How can I get the fixes?
• What do statuses mean?

Notes

References

• MITRE
• NVD
• Launchpad
• Debian

Other references

• http://www.openwall.com/lists/oss-security/2011/08/22/14
• http://webservsec.blogspot.com/2011/02/ruby-on-rails-vulnerability.html
• https://www.cve.org/CVERecord?id=CVE-2011-3187