CVE-2022-31198: GovernorVotesQuorumFraction updates to quorum may affect past defeated proposals in @openzeppelin/contracts
First published: Mon Aug 01 2022(Updated: )
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.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| OpenZeppelin Contracts | >=4.3.0<4.7.2 | |
| OpenZeppelin Contracts Upgradeable | >=4.3.0<4.7.2 |
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Frequently Asked Questions
What is the vulnerability ID of this issue?
The vulnerability ID of this issue is CVE-2022-31198.
What is OpenZeppelin Contracts?
OpenZeppelin Contracts is a library for secure smart contract development.
What is affected by this vulnerability?
Instances of Governor that use the module GovernorVotesQuorumFraction in OpenZeppelin Contracts versions 4.3.0 to 4.7.2 are affected.
What is the severity of CVE-2022-31198?
The severity of CVE-2022-31198 is high with a CVSS score of 7.5.
How can I fix this vulnerability?
To fix this vulnerability, upgrade to a version of OpenZeppelin Contracts that is after 4.7.2.
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