Updated ruby packages that fix two security issues are now available forRed Hat Enterprise Linux 6.The Red Hat Security Response Team has rated this update as having moderatesecurity impact. Common Vulnerability Scoring System base scores,which give detailed severity ratings, are available for each vulnerabilityfrom the CVE links in the References section. Ruby is an extensible, interpreted, object-oriented, scripting language. Ithas features to process text files and to do system management tasks.It was discovered that Ruby#39;s REXML library did not properly restrict XMLentity expansion. An attacker could use this flaw to cause a denial ofservice by tricking a Ruby application using REXML to read text nodes fromspecially-crafted XML content, which will result in REXML consuming largeamounts of system memory. It was found that the RHSA-2011:0910 update did not correctly fix theCVE-2011-1005 issue, a flaw in the method for translating an exceptionmessage into a string in the Exception class. A remote attacker could usethis flaw to bypass safe level 4 restrictions, allowing untrusted code to modify arbitrary, trusted strings, which safe level 4restrictions would otherwise prevent. The CVE-2012-4481 issue was discovered by Vit Ondruch of Red Hat.All users of Ruby are advised to upgrade to these updated packages, whichcontain backported patches to resolve these issues.