RHSA-2012:1059: Moderate: resteasy security update

First published: Thu Jul 05 2012(Updated: )

RESTEasy provides various frameworks to help you build RESTful web services<br>and RESTful Java applications.<br>It was found that RESTEasy was vulnerable to XML External Entity (XXE)<br>attacks. If a remote attacker submitted a request containing an external<br>XML entity to a RESTEasy endpoint, the entity would be resolved, allowing<br>the attacker to read files accessible to the user running the application<br>server. This flaw affected DOM (Document Object Model) Document and JAXB<br>(Java Architecture for XML Binding) input. (CVE-2012-0818)<br>Note: The fix for CVE-2012-0818 is not enabled by default. This update adds<br>a new configuration option to disable entity expansion in RESTEasy. If<br>applications on your server expose RESTEasy XML endpoints, a<br>resteasy.document.expand.entity.references configuration snippet must be<br>added to their web.xml file to disable entity expansion in RESTEasy. Refer<br>to Red Hat Bugzilla bug 785631 for details.<br>Warning: Before applying this update, back up your JBoss Enterprise<br>Application Platform's "jboss-as/server/[PROFILE]/deploy/" directory, along<br>with all other customized configuration files.<br>Users of JBoss Enterprise Application Platform 5.1.2 on Red Hat Enterprise<br>Linux 4, 5, and 6 should upgrade to these updated packages, which correct<br>this issue. The JBoss server process must be restarted for this update to<br>take effect.<br>

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