openzeppelin/openzeppelin-contracts · Security
OpenZeppelin Contracts's governor proposal creation may be blocked by frontrunning
- GHSA ID
- GHSA-5h3x-9wvq-w4m2
- CVE ID
- CVE-2023-34234
- Severity
- medium
- Published
- Updated
- CVSS
- 5.3 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- CVSS v3
- 5.3 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Description
Impact
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.
Patches
The problem has been patched in 4.9.1 by introducing opt-in frontrunning protection.
Workarounds
Submit the proposal creation transaction to an endpoint with frontrunning protection.
Credit
Reported by Lior Abadi and Joaquin Pereyra from Coinspect.
References
CWEs
- CWE-862 · Missing Authorization
References
- https://github.com/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-5h3x-9wvq-w4m2 ↗
- https://nvd.nist.gov/vuln/detail/CVE-2023-34234 ↗
- 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-upgradeable/commit/66f390fa516b550838e2c2f65132b5bc2afe1ced ↗
- https://github.com/advisories/GHSA-5h3x-9wvq-w4m2 ↗