Recommended Mitigation Steps
Consider adding zero-address checks in the discussed constructors: require(newAddr != address(0));.
UPGRADEABLE CONTRACT IS MISSING A __GAP[50] STORAGE VARIABLE TO ALLOW FOR NEW STORAGE VARIABLES IN LATER VERSIONS
See this link for a description of this storage variable. While some contracts may not currently be sub-classed, adding the variable now protects against forgetting to add it in the future.
GalloDaSballo
commented
2 years ago
MISSING ZERO-ADDRESS CHECK IN THE SETTER FUNCTIONS AND INITILIAZERS
Missing checks for zero-addresses may lead to infunctional protocol, if the variable addresses are updated incorrectly.
Proof of Concept Navigate to the following contracts.
https://github.com/code-423n4/2022-09-nouns-builder/blob/7e9fddbbacdd7d7812e912a369cfd862ee67dc03/src/auction/Auction.sol#L39 https://github.com/code-423n4/2022-09-nouns-builder/blob/7e9fddbbacdd7d7812e912a369cfd862ee67dc03/src/auction/Auction.sol#L54-L59 https://github.com/code-423n4/2022-09-nouns-builder/blob/7e9fddbbacdd7d7812e912a369cfd862ee67dc03/src/governance/governor/Governor.sol#L41 https://github.com/code-423n4/2022-09-nouns-builder/blob/7e9fddbbacdd7d7812e912a369cfd862ee67dc03/src/governance/governor/Governor.sol#L57-L64 https://github.com/code-423n4/2022-09-nouns-builder/blob/7e9fddbbacdd7d7812e912a369cfd862ee67dc03/src/governance/governor/Governor.sol#L116-L117 https://github.com/code-423n4/2022-09-nouns-builder/blob/7e9fddbbacdd7d7812e912a369cfd862ee67dc03/src/governance/governor/Governor.sol#L324-L325 https://github.com/code-423n4/2022-09-nouns-builder/blob/7e9fddbbacdd7d7812e912a369cfd862ee67dc03/src/governance/treasury/Treasury.sol#L32 https://github.com/code-423n4/2022-09-nouns-builder/blob/7e9fddbbacdd7d7812e912a369cfd862ee67dc03/src/governance/treasury/Treasury.sol#L43 https://github.com/code-423n4/2022-09-nouns-builder/blob/7e9fddbbacdd7d7812e912a369cfd862ee67dc03/src/governance/treasury/Treasury.sol#L141-L142 https://github.com/code-423n4/2022-09-nouns-builder/blob/7e9fddbbacdd7d7812e912a369cfd862ee67dc03/src/manager/Manager.sol#L55-L60 https://github.com/code-423n4/2022-09-nouns-builder/blob/7e9fddbbacdd7d7812e912a369cfd862ee67dc03/src/token/Token.sol#L30 https://github.com/code-423n4/2022-09-nouns-builder/blob/7e9fddbbacdd7d7812e912a369cfd862ee67dc03/src/token/Token.sol#L43-L47 https://github.com/code-423n4/2022-09-nouns-builder/blob/7e9fddbbacdd7d7812e912a369cfd862ee67dc03/src/token/metadata/MetadataRenderer.sol#L32 https://github.com/code-423n4/2022-09-nouns-builder/blob/7e9fddbbacdd7d7812e912a369cfd862ee67dc03/src/token/metadata/MetadataRenderer.sol#L45-L49
Recommended Mitigation Steps Consider adding zero-address checks in the discussed constructors: require(newAddr != address(0));.
UPGRADEABLE CONTRACT IS MISSING A
__GAP[50]STORAGE VARIABLE TO ALLOW FOR NEW STORAGE VARIABLES IN LATER VERSIONSSee this link for a description of this storage variable. While some contracts may not currently be sub-classed, adding the variable now protects against forgetting to add it in the future.
All upgradeables contracts