what's this

This project which based weblogic_cmd is a poc for CVE-2020-2883.

Two Gadget

First:

ObjectInputStream.readObject()
    PriorityQueue.readObject()
        PriorityQueue.heapify()
            PriorityQueue.siftDown()
                siftDownUsingComparator()
                    com.tangosol.util.comparator.ExtractorComparator.compare()
                        com.tangosol.util.extractor.ChainedExtractor.extract()
                            com.tangosol.util.extractor.ReflectionExtractor().extract()
                                Method.invoke()
    							.......
                            com.tangosol.util.extractor.ReflectionExtractor().extract()
                                Method.invoke()
                                Runtime.exec()                  

Second:

ObjectInputStream.readObject()
    PriorityQueue.readObject()
        PriorityQueue.heapify()
            PriorityQueue.siftDown()
                siftDownUsingComparator()
                    com.tangosol.util.extractor.AbstractExtractor.compare()
                      com.tangosol.util.extractor.MultiExtractor.extract()
                        com.tangosol.util.extractor.ChainedExtractor.extract()
                            com.tangosol.util.extractor.ChainedExtractor.extract()
                                com.tangosol.util.extractor.ReflectionExtractor().extract()
                                    Method.invoke()
    								.......
                                com.tangosol.util.extractor.ReflectionExtractor().extract()
                                    Method.invoke()
                                    Runtime.exec()