CVE-2011-3187

Public Exploit

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.

Category

4.3
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 9.42% Top 10%
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://archives.neohapsis.com/archives/fulldisclosure/2011-02/0337.html mailing list
http://www.openwall.com/lists/oss-security/2011/08/17/1 mailing list patch
http://www.openwall.com/lists/oss-security/2011/08/22/13 mailing list patch
http://webservsec.blogspot.com/2011/02/ruby-on-rails-vulnerability.html exploit
http://www.openwall.com/lists/oss-security/2011/08/19/11 mailing list patch
http://www.openwall.com/lists/oss-security/2011/08/20/1 mailing list patch
http://www.openwall.com/lists/oss-security/2011/08/22/14 mailing list exploit
https://bugzilla.novell.com/show_bug.cgi?id=673010 exploit
http://www.openwall.com/lists/oss-security/2011/08/22/5 mailing list patch

Frequently Asked Questions

What is the severity of CVE-2011-3187?
CVE-2011-3187 has been scored as a medium severity vulnerability.
How to fix CVE-2011-3187?
To fix CVE-2011-3187, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2011-3187 being actively exploited in the wild?
It is possible that CVE-2011-3187 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~9% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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