---
cve: "CVE-2011-3187"
severity: "LOW"
cvss: 3.1
epss: "6.7%"
vendor: "n/a"
kev: false
exploited: false
published: "2011-08-29 18:55:01"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-08T15:29:13+02:00"
---

# CVE-2011-3187

> 3.1 LOW

## Beschreibung

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.

## Exploit-Evidenz

- [EDB-35352 — Ruby on Rails 3.0.5 - 'WEBrick::HTTPRequest' Module HTTP Header Injection](https://www.exploit-db.com/exploits/35352) ✅

## Referenzen

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

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2011-3187) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_