GovernorVotesQuorumFraction updates to quorum may affect past defeated proposals in @openzeppelin/contracts

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

数值计算不正确

OpenZeppelin 安全漏洞

OpenZeppelin是一个应用软件。一个安全区块链应用的标准。 OpenZeppelin 4.3.0 到4.7.2版本、OpenZeppelin contracts-upgradeable 4.3.0 到4.7.2版本存在安全漏洞，该漏洞源于当一项提案被通过以降低法定人数要求时，如果过去的提案仅因缺乏法定人数而被否决，但它收到的票数符合新的法定人数要求，则它们可能会变得可执行。

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