IssueDescription:
It was found that the fix for CVE-2012-0818 was incomplete: external parameter entities were not disabled when the resteasy.document.expand.entity.references parameter was set to false. A remote attacker able to send XML requests to a RESTEasy endpoint could use this flaw to read files accessible to the user running the application server, and potentially perform other more advanced XXE attacks.
RESTEasy permits XXE (XML eXternal Entity) attacks. If a RESTEasy endpoint is deployed, a user can submit a request containing an external XML entity. This XML entity will be resolved, allowing a remote attacker to read files in the context of the user running the application server. This flaw affects DOM Document, JAXB and Fast Infoset (FI) input.
Upstream bugs: https://issues.jboss.org/browse/RESTEASY-637 https://issues.jboss.org/browse/RESTEASY-647 https://issues.jboss.org/browse/RESTEASY-659