CVE-2021-39167 CRITICAL

CVE-2021-39167: TimelockController vulnerability in OpenZeppelin Contracts

Vendor Openzeppelin
Product openzeppelin-contracts
Weakness CWE-269
Published August 26, 2021
Last update August 4, 2024

CVSS base score

10.0/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

What the vulnerability does

01Description

OpenZepplin is a library for smart contract development. In affected versions a vulnerability in TimelockController allowed an actor with the executor role to escalate privileges. Further details about the vulnerability will be disclosed at a later date. As a workaround revoke the executor role from accounts not strictly under the team's control. We recommend revoking all executors that are not also proposers. When applying this mitigation, ensure there is at least one proposer and executor remaining.

Key dates

02Disclosure timeline

August 26, 2021 CVE published
August 4, 2024 Record updated