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code-423n4 / 2021-04-vader-findings

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Token can be burn through transfer #262

Open code423n4 opened 3 years ago

code423n4 commented 3 years ago

Handle

s1m0

Vulnerability details

Impact

The token can be sent to address(0) through a normal transfer() without decreasing the totalSupply as it would with calling burn() and it could cause an unintentional burn.

Proof of Concept

https://github.com/code-423n4/2021-04-vader/blob/main/vader-protocol/contracts/Vader.sol#L122 https://github.com/code-423n4/2021-04-vader/blob/main/vader-protocol/contracts/USDV.sol#L102

Tools Used

Manual analysis

Recommended Mitigation Steps

Consider checking the recipient address to be != address(0).