RHSA-2012:1056: Moderate: resteasy security update

RESTEasy provides various frameworks to help you build RESTful web servicesand RESTful Java applications.It was found that RESTEasy was vulnerable to XML External Entity (XXE)attacks. If a remote attacker submitted a request containing an externalXML entity to a RESTEasy endpoint, the entity would be resolved, allowingthe attacker to read files accessible to the user running the applicationserver. This flaw affected DOM (Document Object Model) Document and JAXB(Java Architecture for XML Binding) input. (CVE-2012-0818)Note: The fix for CVE-2012-0818 is not enabled by default. This update addsa new configuration option to disable entity expansion in RESTEasy. Ifapplications on your server expose RESTEasy XML endpoints, aresteasy.document.expand.entity.references configuration snippet must beadded to their web.xml file to disable entity expansion in RESTEasy. Referto Red Hat Bugzilla bug 785631 for details.Warning: Before applying this update, back up your JBoss EnterpriseApplication Platform's "jboss-as/server/[PROFILE]/deploy/" directory, alongwith all other customized configuration files.All users of JBoss Enterprise Application Platform 5.1.2 as provided fromthe Red Hat Customer Portal are advised to install this update.