CVE-2023-34234
Description
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.
How to fix
- openzeppelin contracts4.9.1 or later
- openzeppelin contracts_upgradeable4.9.1 or later
- @openzeppelin/contracts4.9.1 or later
- @openzeppelin/contracts-upgradeable4.9.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| openzeppelin contracts | 4.3.0 ≤ v < 4.9.1 | 4.9.1 |
| openzeppelin contracts_upgradeable | 4.3.0 ≤ v < 4.9.1 | 4.9.1 |
| @openzeppelin/contractsnpm | 4.3.0 ≤ v < 4.9.1 | 4.9.1 |
| @openzeppelin/contracts-upgradeablenpm | 4.3.0 ≤ v < 4.9.1 | 4.9.1 |
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Attack Surface Management
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