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Red Hat Security Advisory 2013-1427-01

Red Hat Security Advisory 2013-1427-01
Posted Oct 16, 2013
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2013-1427-01 - Ruby is an extensible, interpreted, object-oriented, scripting language. It has features to process text files and to do system management tasks. RubyGems is the Ruby standard for publishing and managing third-party libraries. It was discovered that the rubygems API validated version strings using an unsafe regular expression. An application making use of this API to process a version string from an untrusted source could be vulnerable to a denial of service attack through CPU exhaustion.

tags | advisory, denial of service, ruby
systems | linux, redhat
advisories | CVE-2013-4287
MD5 | 46befcdd3719882922b9eded8ec66c15

Red Hat Security Advisory 2013-1427-01

Change Mirror Download
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=====================================================================
Red Hat Security Advisory

Synopsis: Moderate: ruby193-ruby security update
Advisory ID: RHSA-2013:1427-01
Product: Red Hat Software Collections
Advisory URL: https://rhn.redhat.com/errata/RHSA-2013-1427.html
Issue date: 2013-10-15
CVE Names: CVE-2013-4287
=====================================================================

1. Summary:

Updated ruby193-ruby packages that fix one security issue are now available
for Red Hat Software Collections 1.

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:

Red Hat Software Collections for RHEL 6 Server - noarch, x86_64
Red Hat Software Collections for RHEL 6 Workstation - 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. RubyGems is the Ruby standard for publishing and managing
third-party libraries.

It was discovered that the rubygems API validated version strings using an
unsafe regular expression. An application making use of this API to process
a version string from an untrusted source could be vulnerable to a denial
of service attack through CPU exhaustion. (CVE-2013-4287)

Red Hat would like to thank Rubygems upstream for reporting
CVE-2013-4287. Upstream acknowledges Damir Sharipov as the original
reporter.

All ruby193-ruby users are advised to upgrade to these updated packages,
which contain a backported patch to correct this issue.

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/):

1002364 - CVE-2013-4287 rubygems: version regex algorithmic complexity vulnerability

6. Package List:

Red Hat Software Collections for RHEL 6 Server:

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/RHSCL/SRPMS/ruby193-ruby-1.9.3.448-40.el6.src.rpm

noarch:
ruby193-ruby-irb-1.9.3.448-40.el6.noarch.rpm
ruby193-rubygem-minitest-2.5.1-40.el6.noarch.rpm
ruby193-rubygem-rake-0.9.2.2-40.el6.noarch.rpm
ruby193-rubygems-1.8.23-40.el6.noarch.rpm
ruby193-rubygems-devel-1.8.23-40.el6.noarch.rpm

x86_64:
ruby193-ruby-1.9.3.448-40.el6.x86_64.rpm
ruby193-ruby-debuginfo-1.9.3.448-40.el6.x86_64.rpm
ruby193-ruby-devel-1.9.3.448-40.el6.x86_64.rpm
ruby193-ruby-doc-1.9.3.448-40.el6.x86_64.rpm
ruby193-ruby-libs-1.9.3.448-40.el6.x86_64.rpm
ruby193-ruby-tcltk-1.9.3.448-40.el6.x86_64.rpm
ruby193-rubygem-bigdecimal-1.1.0-40.el6.x86_64.rpm
ruby193-rubygem-io-console-0.3-40.el6.x86_64.rpm
ruby193-rubygem-json-1.5.5-40.el6.x86_64.rpm
ruby193-rubygem-rdoc-3.9.5-40.el6.x86_64.rpm

Red Hat Software Collections for RHEL 6 Workstation:

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/RHSCL/SRPMS/ruby193-ruby-1.9.3.448-40.el6.src.rpm

noarch:
ruby193-ruby-irb-1.9.3.448-40.el6.noarch.rpm
ruby193-rubygem-minitest-2.5.1-40.el6.noarch.rpm
ruby193-rubygem-rake-0.9.2.2-40.el6.noarch.rpm
ruby193-rubygems-1.8.23-40.el6.noarch.rpm
ruby193-rubygems-devel-1.8.23-40.el6.noarch.rpm

x86_64:
ruby193-ruby-1.9.3.448-40.el6.x86_64.rpm
ruby193-ruby-debuginfo-1.9.3.448-40.el6.x86_64.rpm
ruby193-ruby-devel-1.9.3.448-40.el6.x86_64.rpm
ruby193-ruby-doc-1.9.3.448-40.el6.x86_64.rpm
ruby193-ruby-libs-1.9.3.448-40.el6.x86_64.rpm
ruby193-ruby-tcltk-1.9.3.448-40.el6.x86_64.rpm
ruby193-rubygem-bigdecimal-1.1.0-40.el6.x86_64.rpm
ruby193-rubygem-io-console-0.3-40.el6.x86_64.rpm
ruby193-rubygem-json-1.5.5-40.el6.x86_64.rpm
ruby193-rubygem-rdoc-3.9.5-40.el6.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-2013-4287.html
https://access.redhat.com/security/updates/classification/#moderate

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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