Token allowances vulnerable to front-running

Handle toastedsteaksandwich Vulnerability details Impact The LockeERC20.approve function is vulnerable to front-running, as described in the following scenario: 1. Alice approves Bob to transfer 5 tokens 2. Alice decides to reduce this allowance to 3 tokens 3. Bob notices the allowance reduction ...

LockeERC20 is vulnerable to frontrun attack

Handle egjlmn1 Vulnerability details Impact a user can steal another user's tokens if he frontrun before he changes the allowance. The approve function receives an amount to change to. Lets say user A approved user B to take N tokens, and now he wants to change from N to M, if he calls approveM t...