CVE-2023-30542
The proposal creation entrypoint (`propose`) in `GovernorCompatibilityBravo` allows the creation of proposals with a `signatures` array shorter than the `calldatas` array.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.58%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.58% probability · 46th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Affected
- openzeppelin/contracts · openzeppelin/contracts upgradeable
- Source
- security-advisories@github.com
References
- https://github.com/OpenZeppelin/openzeppelin-contracts/releases/tag/v4.8.3Release Notes
- https://github.com/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-93hq-5wgc-jc82Vendor Advisory
- https://github.com/OpenZeppelin/openzeppelin-contracts/releases/tag/v4.8.3Release Notes
- https://github.com/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-93hq-5wgc-jc82Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.