An issue was discovered in EthereumJ 1.8.2. There is Unsafe Deserialization in ois.readObject in mine/Ethash.java and decoder.readObject in crypto/ECKey.java. When a node syncs and mines a new block, arbitrary OS commands can be run on the server.Referenceshttps://github.com/ethereum/ethereumjhttps://github.com/frohoff/ysoserial/https://github.com/ethereum/ethereumj/issues/1161
