RHSA-2013:1427 - Security Advisory

Topic

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.

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.

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

Affected Products

• Red Hat Software Collections (for RHEL Server) 1 for RHEL 6.4 x86_64
• Red Hat Software Collections (for RHEL Server) 1 for RHEL 6.3 x86_64
• Red Hat Software Collections (for RHEL Server) 1 for RHEL 6.2 x86_64
• Red Hat Software Collections (for RHEL Server) 1 for RHEL 6 x86_64
• Red Hat Software Collections (for RHEL Workstation) 1 for RHEL 6 x86_64
• Red Hat Software Collections (for RHEL Server) from RHUI 1 for RHEL 6 x86_64

Fixes

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

CVEs

• CVE-2013-4287

References

• https://access.redhat.com/security/updates/classification/#moderate