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Red Hat Security Advisory 2013-1103-01

Red Hat Security Advisory 2013-1103-01
Posted Jul 24, 2013
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2013-1103-01 - Ruby is an extensible, interpreted, object-oriented, scripting language. It has features to process text files and to do system management tasks. Red Hat OpenStack makes use of Puppet, which is written in Ruby. A flaw was found in Ruby's SSL client's hostname identity check when handling certificates that contain hostnames with NULL bytes. An attacker could potentially exploit this flaw to conduct a man-in-the-middle attack against the Puppet master and its clients. Note that to exploit this issue, an attacker would need to get a carefully-crafted certificate signed by an authority that the Puppet master and clients trust.

tags | advisory, ruby
systems | linux, redhat
advisories | CVE-2013-4073
SHA-256 | 3af6f62904e5e2f9c0544724370c57e046a437d3917b85caaca4e7f10e3a6731

Red Hat Security Advisory 2013-1103-01

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=====================================================================
Red Hat Security Advisory

Synopsis: Moderate: ruby193-ruby security update
Advisory ID: RHSA-2013:1103-01
Product: Red Hat OpenStack
Advisory URL: https://rhn.redhat.com/errata/RHSA-2013-1103.html
Issue date: 2013-07-23
CVE Names: CVE-2013-4073
=====================================================================

1. Summary:

Updated ruby193-ruby packages that fix one security issue are now available
for Red Hat OpenStack 3.0 (Grizzly).

The Red Hat Security Response Team has rated this update as having moderate
security impact. A Common Vulnerability Scoring System (CVSS) base score,
which gives a detailed severity rating, is available from the CVE link in
the References section.

2. Relevant releases/architectures:

OpenStack 3 - noarch, x86_64

3. Description:

Ruby is an extensible, interpreted, object-oriented, scripting language. It
has features to process text files and to do system management tasks. Red
Hat OpenStack makes use of Puppet, which is written in Ruby.

A flaw was found in Ruby's SSL client's hostname identity check when
handling certificates that contain hostnames with NULL bytes. An attacker
could potentially exploit this flaw to conduct a man-in-the-middle attack
against the Puppet master and its clients. Note that to exploit this issue,
an attacker would need to get a carefully-crafted certificate signed by an
authority that the Puppet master and clients trust. (CVE-2013-4073)

Users of Red Hat OpenStack 3.0 (Grizzly) are advised to upgrade to these
updated packages, which correct this issue. After installing the update,
the puppetmaster service must be restarted on the Puppet master server,
and the puppet service must be restarted on all clients that run the
Puppet agent as a daemon.

4. Solution:

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
https://access.redhat.com/site/articles/11258

5. Bugs fixed (http://bugzilla.redhat.com/):

979251 - CVE-2013-4073 ruby: hostname check bypassing vulnerability in SSL client

6. Package List:

OpenStack 3:

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/RHOS/SRPMS/ruby193-ruby-1.9.3.429-34.2.el6ost.src.rpm

noarch:
ruby193-ruby-irb-1.9.3.429-34.2.el6ost.noarch.rpm
ruby193-rubygem-minitest-2.5.1-34.2.el6ost.noarch.rpm
ruby193-rubygem-rake-0.9.2.2-34.2.el6ost.noarch.rpm

x86_64:
ruby193-ruby-1.9.3.429-34.2.el6ost.x86_64.rpm
ruby193-ruby-debuginfo-1.9.3.429-34.2.el6ost.x86_64.rpm
ruby193-ruby-devel-1.9.3.429-34.2.el6ost.x86_64.rpm
ruby193-ruby-doc-1.9.3.429-34.2.el6ost.x86_64.rpm
ruby193-ruby-libs-1.9.3.429-34.2.el6ost.x86_64.rpm
ruby193-ruby-tcltk-1.9.3.429-34.2.el6ost.x86_64.rpm
ruby193-rubygem-bigdecimal-1.1.0-34.2.el6ost.x86_64.rpm
ruby193-rubygem-io-console-0.3-34.2.el6ost.x86_64.rpm
ruby193-rubygem-json-1.5.5-34.2.el6ost.x86_64.rpm

These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/#package

7. References:

https://www.redhat.com/security/data/cve/CVE-2013-4073.html
https://access.redhat.com/security/updates/classification/#moderate
http://www.ruby-lang.org/en/news/2013/06/27/hostname-check-bypassing-vulnerability-in-openssl-client-cve-2013-4073/

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2013 Red Hat, Inc.
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