full-disclosure - Ruby on Rails Vulnerability

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Message-ID: <AANLkTikOpkzYBNQyqiqk2brMT7CiW=-g3Yw1tbA-QJJG@mail.gmail.com>
Date: Wed, 16 Feb 2011 14:31:13 +0100
From: Jimmy Bandit <jimmy.bandit.music@...glemail.com>
To: full-disclosure@...ts.grok.org.uk
Subject: Ruby on Rails Vulnerability

hi,

the X-Forwarded-For headerfield isn't sanitized if the request comes
from a class c network. This would affect intranet-applications.

i made a poc screencast that shows the bug with the latest rails
version with devise (authentication-plugin) and more possible attacks

http://webservsec.blogspot.com/2011/02/ruby-on-rails-vulnerability.html

quick-fix for your intranet-apps:
check request.remote_ip before you use it

best regards
J

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