CVE-2022-31198
Description
OpenZeppelin Contracts is a library for secure smart contract development. This issue concerns instances of Governor that use the module `GovernorVotesQuorumFraction`, a mechanism that determines quorum requirements as a percentage of the voting token's total supply. In affected instances, when a proposal is passed to lower the quorum requirements, past proposals may become executable if they had been defeated only due to lack of quorum, and the number of votes it received meets the new quorum requirement. Analysis of instances on chain found only one proposal that met this condition, and we are actively monitoring for new occurrences of this particular issue. This issue has been patched in v4.7.2. Users are advised to upgrade. Users unable to upgrade should consider avoiding lowering quorum requirements if a past proposal was defeated for lack of quorum.
How to fix
- openzeppelin contracts4.7.2 or later
- openzeppelin contracts_upgradeable4.7.2 or later
- @openzeppelin/contracts4.7.2 or later
- @openzeppelin/contracts-upgradeable4.7.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| openzeppelin contracts | 4.3.0 ≤ v < 4.7.2 | 4.7.2 |
| openzeppelin contracts_upgradeable | 4.3.0 ≤ v < 4.7.2 | 4.7.2 |
| @openzeppelin/contractsnpm | 4.3.0 ≤ v < 4.7.2 | 4.7.2 |
| @openzeppelin/contracts-upgradeablenpm | 4.3.0 ≤ v < 4.7.2 | 4.7.2 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.