Replay Attack

github.com/hyperledger/fabric is vulnerable to replay attacks. The library does not verify that the TxID of a transaction is unique, allowing a malicious user to possibly overwrite a currently existing transactionID...

Denial Of Service (DoS) Via Memory Consumption

github.com/hyperledger/fabric is vulnerable to denial of service DoS attacks. The attacks exists because it uses hash field in the protos comparator function to compare two large blocks disseminated. However, it does not prevent sending of arbitrary hash via the hash field of the DataMsg, leading...