CVE-2021-39168 Information

Description

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.

CVSS Vector

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

Reference

https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/CHANGELOG.md#431 https://github.com/OpenZeppelin/openzeppelin-contracts-upgradeable/security/advisories/GHSA-vrw4-w73r-6mm8 https://github.com/OpenZeppelin/openzeppelin-contracts/commit/cec4f2ef57495d8b1742d62846da212515d99dd5

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8