CVE-2023-34234
OpenZeppelin Contracts is a library for smart contract development. By frontrunning the creation of a proposal, an attacker can become the proposer and gain the ability to cancel it. The attacker can do this repeatedly to try to prevent a proposal from being proposed at all. This impacts the Governor contract in v4.9.0 only, and the GovernorCompatibilityBravo contract since v4.3.0. This problem has been patched in 4.9.1 by introducing opt-in frontrunning protection. Users are advised to upgrade. Users unable to upgrade may submit the proposal creation transaction to an endpoint with frontrunning protection as a workaround.
| Software | From | Fixed in |
|---|---|---|
@openzeppelin / contracts
|
4.3.0 | 4.9.1 |
|
@openzeppelin / contracts-upgradeable
|
4.3.0 | 4.9.1 |
| openzeppelin / contracts_upgradeable | 4.3.0 | 4.9.1 |
| openzeppelin / contracts | 4.3.0 | 4.9.1 |
- https://github.com/OpenZeppelin/openzeppelin-contracts-upgradeable/commit/66f390fa516b550838e2c2f65132b5bc2afe1ced
- https://github.com/OpenZeppelin/openzeppelin-contracts/commit/d9474327a492f9f310f31bc53f38dbea56ed9a57
- https://github.com/OpenZeppelin/openzeppelin-contracts/releases/tag/v4.9.1
- https://github.com/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-5h3x-9wvq-w4m2
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