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Posted to issues@flex.apache.org by "Markus Wulftange (JIRA)" <ji...@apache.org> on 2017/04/03 07:23:41 UTC

[jira] [Created] (FLEX-35290) Deserialization of Untrusted Data via Externalizable.readExternal

Markus Wulftange created FLEX-35290:
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             Summary: Deserialization of Untrusted Data via Externalizable.readExternal
                 Key: FLEX-35290
                 URL: https://issues.apache.org/jira/browse/FLEX-35290
             Project: Apache Flex
          Issue Type: Bug
          Components: BlazeDS
    Affects Versions: BlazeDS 4.7.2
            Reporter: Markus Wulftange
            Priority: Critical


The AMF deserialization implementation of Flex BlazeDS is vulnerable to Deserialization of Untrusted Data via {{Externalizable.readExternal(ObjectInput)}}.

By sending a specially crafted AMF message, it is possible to make the server establish a connection to an endpoint specified in the message and request an RMI remote object from that endpoint. This can result in the execution of arbitrary code on the server via Java deserialization.



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