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AUSCERT External Security Bulletin Redistribution
Important: ruby193-rubygem-actionpack security update
6 December 2013
AusCERT Security Bulletin Summary
Publisher: Red Hat
Operating System: Red Hat Enterprise Linux Server 6
Red Hat Enterprise Linux WS/Desktop 6
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Denial of Service -- Remote/Unauthenticated
Cross-site Scripting -- Remote with User Interaction
Reduced Security -- Remote/Unauthenticated
CVE Names: CVE-2013-6417 CVE-2013-6415 CVE-2013-6414
Comment: This advisory references vulnerabilities in products which run on
platforms other than Red Hat. It is recommended that administrators
running ruby193-rubygem-actionpack check for an updated version of
the software for their operating system.
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Red Hat Security Advisory
Synopsis: Important: ruby193-rubygem-actionpack security update
Advisory ID: RHSA-2013:1794-01
Product: Red Hat Software Collections
Advisory URL: https://rhn.redhat.com/errata/RHSA-2013-1794.html
Issue date: 2013-12-05
CVE Names: CVE-2013-4491 CVE-2013-6414 CVE-2013-6415
Updated ruby193-rubygem-actionpack packages that fix multiple security
issues are now available for Red Hat Software Collections 1.
The Red Hat Security Response Team has rated this update as having
important security impact. Common Vulnerability Scoring System (CVSS) base
scores, which give detailed severity ratings, are available for each
vulnerability from the CVE links in the References section.
2. Relevant releases/architectures:
Red Hat Software Collections for RHEL 6 Server - noarch
Red Hat Software Collections for RHEL 6 Workstation - noarch
Ruby on Rails is a model-view-controller (MVC) framework for web
application development. Action Pack implements the controller and the
A flaw was found in the way Ruby on Rails performed JSON parameter parsing.
An application using a third party library, which uses the Rack::Request
interface, or custom Rack middleware could bypass the protection
implemented to fix the CVE-2013-0155 vulnerability, causing the application
to receive unsafe parameters and become vulnerable to CVE-2013-0155.
It was discovered that the internationalization component of Ruby on Rails
could, under certain circumstances, return a fallback HTML string that
contained user input. A remote attacker could possibly use this flaw to
perform a reflective cross-site scripting (XSS) attack by providing a
specially crafted input to an application using the aforementioned
A denial of service flaw was found in the header handling component of
Action View. A remote attacker could send strings in specially crafted
headers that would be cached indefinitely, which would result in all
available system memory eventually being consumed. (CVE-2013-6414)
It was found that the number_to_currency Action View helper did not
properly escape the unit parameter. An attacker could use this flaw to
perform a cross-site scripting (XSS) attack on an application that uses
data submitted by a user in the unit parameter. (CVE-2013-6415)
All ruby193-rubygem-actionpack users are advised to upgrade to these
updated packages, which contain backported patches to correct these issues.
Before applying this update, make sure all previously released errata
relevant to your system have been applied.
This update is available via the Red Hat Network. Details on how to use the
Red Hat Network to apply this update are available at
5. Bugs fixed (https://bugzilla.redhat.com/):
1036409 - CVE-2013-6417 rubygem-actionpack: unsafe query generation risk (incomplete fix for CVE-2013-0155)
1036483 - CVE-2013-6414 rubygem-actionpack: Action View DoS
1036910 - CVE-2013-6415 rubygem-actionpack: number_to_currency XSS
1036922 - CVE-2013-4491 rubygem-actionpack: i18n missing translation XSS
6. Package List:
Red Hat Software Collections for RHEL 6 Server:
Red Hat Software Collections for RHEL 6 Workstation:
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
The Red Hat security contact is <email@example.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2013 Red Hat, Inc.
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