[wildfly-dev] Concerns about deserialization attacks

Hi all, As you probably know, there has recently been quite some discussion about remotely exploitable attacks via deserialization, for instance [1] and [2]. These exploits are demonstrated against commons-collections 3 and 4, spring 4 and groovy 2.4.4, but it is very likely other libraries (if not the jdk itself) also contain vulnerable code. In general, the advise is to not accept any serialized objects on a public interface. WildFly multiplexes its remote EJB invocation over the http port via http- remoting. I've found a way to make a WilfFly instance, configured with the default standalone.xml, accept arbitrary serialized objects. Access to port 8080 is all you need. I've been able to verify the commons-collections exploit by adding commons-collections to the right module and let WildFly deserialize my objects. So far, I've not been able to exploit WildFly using only the classes available via this route, but I've got the feeling that this is only a matter of time. As this is potentially sensitive information, I'm looking for a less public channel to share the details. Best regards, Emond Papegaaij [1] http://www.infoq.com/news/2015/11/commons-exploit [2] http://foxglovesecurity.com/2015/11/06/what-do-weblogic-websphere-jboss-j...