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https://issues.apache.org/jira/browse/COLLECTIONS-580?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14999172#comment-14999172
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Devin Rosenbauer commented on COLLECTIONS-580:
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I think that whatever is done with InvokerTransformer should also be done with
InstantiationTransformer (and the various related Factories and Closures and
such). There are classes that do unsafe things in their constructors. For that
matter, there may be classes that do unsafe things in their toStrings.
> Arbitrary remote code execution with InvokerTransformer
> -------------------------------------------------------
>
> Key: COLLECTIONS-580
> URL: https://issues.apache.org/jira/browse/COLLECTIONS-580
> Project: Commons Collections
> Issue Type: Bug
> Affects Versions: 3.0, 4.0
> Reporter: Philippe Marschall
> Attachments: COLLECTIONS-580.patch
>
>
> With {{InvokerTransformer}} serializable collections can be build that
> execute arbitrary Java code.
> {{sun.reflect.annotation.AnnotationInvocationHandler#readObject}} invokes
> {{#entrySet}} and {{#get}} on a deserialized collection. If you have an
> endpoint that accepts serialized Java objects (JMX, RMI, remote EJB, ...) you
> can combine the two to create arbitrary remote code execution vulnerability.
> I don't know of a good fix short of removing {{InvokerTransformer}} or making
> it not Serializable. Both probably break existing applications.
> This is not my research, but has been discovered by other people.
> https://github.com/frohoff/ysoserial
> http://foxglovesecurity.com/2015/11/06/what-do-weblogic-websphere-jboss-jenkins-opennms-and-your-application-have-in-common-this-vulnerability/
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