Scientific Linux SL6: 2012-01-30 Moderate: Ruby Denial Of Service Issue

Date: Tue, 31 Jan 2012 08:48:02 -0600
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Sender: Security Errata for Scientific Linux
 
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Subject: Security ERRATA Moderate: ruby on SL6.x i386/x86_64
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Synopsis: Moderate: ruby security update
Issue Date: 2012-01-30
CVE Numbers: CVE-2011-4815

Ruby is an extensible, interpreted, object-oriented, scripting language. It
has features to process text files and to do system management tasks.

A denial of service flaw was found in the implementation of associative
arrays (hashes) in Ruby. An attacker able to supply a large number of
inputs to a Ruby application (such as HTTP POST request parameters sent to
a web application) that are used as keys when inserting data into an array
could trigger multiple hash function collisions, making array operations
take an excessive amount of CPU time. To mitigate this issue, randomization
has been added to the hash function to reduce the chance of an attacker
successfully causing intentional collisions. (CVE-2011-4815)

All users of ruby are advised to upgrade to these updated packages, which
contain a backported patch to resolve this issue.

SL6:
 i386
 ruby-1.8.7.352-4.el6_2.i686.rpm
 ruby-debuginfo-1.8.7.352-4.el6_2.i686.rpm
 ruby-devel-1.8.7.352-4.el6_2.i686.rpm
 ruby-docs-1.8.7.352-4.el6_2.i686.rpm
 ruby-irb-1.8.7.352-4.el6_2.i686.rpm
 ruby-libs-1.8.7.352-4.el6_2.i686.rpm
 ruby-rdoc-1.8.7.352-4.el6_2.i686.rpm
 ruby-ri-1.8.7.352-4.el6_2.i686.rpm
 ruby-static-1.8.7.352-4.el6_2.i686.rpm
 ruby-tcltk-1.8.7.352-4.el6_2.i686.rpm
 x86_64
 ruby-1.8.7.352-4.el6_2.x86_64.rpm
 ruby-debuginfo-1.8.7.352-4.el6_2.i686.rpm
 ruby-debuginfo-1.8.7.352-4.el6_2.x86_64.rpm
 ruby-devel-1.8.7.352-4.el6_2.i686.rpm
 ruby-devel-1.8.7.352-4.el6_2.x86_64.rpm
 ruby-docs-1.8.7.352-4.el6_2.x86_64.rpm
 ruby-irb-1.8.7.352-4.el6_2.x86_64.rpm
 ruby-libs-1.8.7.352-4.el6_2.i686.rpm
 ruby-libs-1.8.7.352-4.el6_2.x86_64.rpm
 ruby-rdoc-1.8.7.352-4.el6_2.x86_64.rpm
 ruby-ri-1.8.7.352-4.el6_2.x86_64.rpm
 ruby-static-1.8.7.352-4.el6_2.x86_64.rpm
 ruby-tcltk-1.8.7.352-4.el6_2.x86_64.rpm

- Scientific Linux Development Team