CVE-2022-31198
August 01, 2022
OpenZeppelin Contracts is a library for secure smart contract development. This issue concerns instances of Governor that use the module "GovernorVotesQuorumFraction", a mechanism that determines quorum requirements as a percentage of the voting token's total supply. In affected instances, when a proposal is passed to lower the quorum requirements, past proposals may become executable if they had been defeated only due to lack of quorum, and the number of votes it received meets the new quorum requirement. Analysis of instances on chain found only one proposal that met this condition, and we are actively monitoring for new occurrences of this particular issue. This issue has been patched in v4.7.2. Users are advised to upgrade. Users unable to upgrade should consider avoiding lowering quorum requirements if a past proposal was defeated for lack of quorum.
Affected Packages
@openzeppelin/contracts (NPM):
Affected version(s) >=4.3.0 <4.7.2Fix Suggestion:
Update to version 4.7.2@openzeppelin/contracts-upgradeable (NPM):
Affected version(s) >=4.3.0 <4.7.2Fix Suggestion:
Update to version 4.7.2Additional Notes
The description of this vulnerability differs from MITRE.
Related Resources (6)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Incorrect Calculation
EPSS
Base Score:
0.27
