Submission Details
Severity:
`sellProfits()` are vulnerable to slippage attacks
Summary
sellProfits() are vulnerable to slippage attacks because of it set the amountOutMinimum is 0.
Vulnerability Details
https://github.com/Cyfrin/2023-07-beedle/blob/main/src/Fees.sol#L38
function sellProfits(address _profits) public {
require(_profits != WETH, "not allowed");
uint256 amount = IERC20(_profits).balanceOf(address(this));
ISwapRouter.ExactInputSingleParams memory params = ISwapRouter
.ExactInputSingleParams({
tokenIn: _profits,
tokenOut: WETH,
fee: 3000,
recipient: address(this),
deadline: block.timestamp,
amountIn: amount,
amountOutMinimum: 0,//@audit
sqrtPriceLimitX96: 0
});
amount = swapRouter.exactInputSingle(params);
IERC20(WETH).transfer(staking, IERC20(WETH).balanceOf(address(this)));
}
Impact
slippage attacks
Tools Used
manual
Recommendations
set amountOutMinimum by user
Prize pool breakdown
Total prize
20,000 USDC
nSLOC
70628 USDC / LOC
18,000 USDC
2,000 USDC
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