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https://issues.apache.org/jira/browse/COLLECTIONS-580?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15008749#comment-15008749
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Stevie Beck commented on COLLECTIONS-580:
-----------------------------------------

+1 (thanks for the fix!)
Regarding CVE number: Mitre did not (yet?) assign one, and there has been a 
controversial discussion in the OSS Security list around it, see: 
http://seclists.org/oss-sec/2015/q4/280
CVE-2015-4852 was assigned by Oracle and is started to be used by other 
vendors, whose products are impacted by the issue.

> 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
>             Fix For: 3.2.2, 4.1
>
>         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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