CVE-2023-30542: GovernorCompatibilityBravo may trim proposal calldata
First published: Sun Apr 16 2023(Updated: )
OpenZeppelin Contracts is a library for secure smart contract development. The proposal creation entrypoint (`propose`) in `GovernorCompatibilityBravo` allows the creation of proposals with a `signatures` array shorter than the `calldatas` array. This causes the additional elements of the latter to be ignored, and if the proposal succeeds the corresponding actions would eventually execute without any calldata. The `ProposalCreated` event correctly represents what will eventually execute, but the proposal parameters as queried through `getActions` appear to respect the original intended calldata. This issue has been patched in 4.8.3. As a workaround, ensure that all proposals that pass through governance have equal length `signatures` and `calldatas` parameters.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| OpenZeppelin Contracts | >=4.3.0<4.8.3 | |
| OpenZeppelin Contracts Upgradeable | >=4.3.0<4.8.3 |
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Reference Links
Frequently Asked Questions
What is CVE-2023-30542?
CVE-2023-30542 is a vulnerability in the OpenZeppelin Contracts library that allows the creation of proposals with a shorter signatures array than the calldatas array.
What is the severity of CVE-2023-30542?
The severity of CVE-2023-30542 is high with a CVSS score of 8.8.
How does CVE-2023-30542 affect OpenZeppelin Contracts?
CVE-2023-30542 affects OpenZeppelin Contracts versions between 4.3.0 and 4.8.3, allowing the creation of proposals with mismatched arrays.
How can I fix CVE-2023-30542?
To fix CVE-2023-30542, you should upgrade to OpenZeppelin Contracts version 4.8.3 or later.
Where can I find more information about CVE-2023-30542?
You can find more information about CVE-2023-30542 in the OpenZeppelin Contracts release notes and the associated security advisory.
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