Coinbase: ETH contract handling errors

A business logic error in the ETH contract handling code allowed for a nested revert call in contract execution to improperly credit a user account though funds had not been transferred. In addition, the code did not appropriately handle delegatecall within a contract. Sample contract for the fir...

Coinbase: Ethereum account balance manipulation

The researchers noticed an issue with our ETH receiving code when receiving from a contract. This allowed sending of ETH to Coinbase to be credited even if the underlying contract execution failed. The issue was fixed by changing the contract handling logic. Analysis of the issue indicated only...