CVE-2011-3624

Name: CVE-2011-3624
Creator: NVD / NIST
Published: 2019-11-26T03:15:10.91+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 1.52%

Last modified Jun 16, 2026

CVE-2011-3624 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. Various methods in WEBrick::HTTPRequest in Ruby 1.9.2 and 1.8.7 and earlier do not validate the X-Forwarded-For, X-Forwarded-Host and X-Forwarded-Server headers in requests, which might allow remote attackers to inject arbitrary text into log files or bypass intended address parsing via a crafted header.. EPSS estimates a 1.52% chance of exploitation in the next 30 days.

Description

Various methods in WEBrick::HTTPRequest in Ruby 1.9.2 and 1.8.7 and earlier do not validate the X-Forwarded-For, X-Forwarded-Host and X-Forwarded-Server headers in requests, which might allow remote attackers to inject arbitrary text into log files or bypass intended address parsing via a crafted header.

Metrics

CVSS 3.1

5.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS Probability

1.52%

71.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-74

Affected Software

Vendor	Product	Versions
Ruby-Lang	Ruby	1.8.7
Ruby-Lang	Ruby	1.9.2

References

https://access.redhat.com/security/cve/cve-2011-3624Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-3624Issue Tracking, Third Party Advisory
https://redmine.ruby-lang.org/issues/5418
https://security-tracker.debian.org/tracker/CVE-2011-3624Third Party Advisory
https://access.redhat.com/security/cve/cve-2011-3624Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2011-3624Issue Tracking, Third Party Advisory
https://redmine.ruby-lang.org/issues/5418
https://security-tracker.debian.org/tracker/CVE-2011-3624Third Party Advisory

Timeline

Published: Nov 26, 2019
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2011-3624?

How severe is CVE-2011-3624?

CVE-2011-3624 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 1.52% probability of exploitation in the next 30 days.

How do I fix CVE-2011-3624?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2011-3624?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST