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CVE-2021-39167— TimelockController vulnerability in OpenZeppelin Contracts

Quick assessment

Affected
OpenZeppelin openzeppelin-contracts
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

OpenZepplin是一个用于智能合约开发的库。 OpenZepplin存在安全漏洞，该漏洞源于在受影响的版本中的TimelockController中的漏洞允许具有执行者角色的参与者进行权限提升。

CVSS 10.0 · Critical EPSS 1.59% · P75

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2021-39167

Vulnerability Information
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Vulnerability Title
TimelockController vulnerability in OpenZeppelin Contracts
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
特权管理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
OpenZepplin 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenZepplin是一个用于智能合约开发的库。 OpenZepplin存在安全漏洞，该漏洞源于在受影响的版本中的TimelockController中的漏洞允许具有执行者角色的参与者进行权限提升。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
OpenZeppelin openzeppelin-contracts >=4.0.0, < 4.3.1 -

II. Public POCs for CVE-2021-39167

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III. Intelligence Information for CVE-2021-39167

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Patches & Fixes for CVE-2021-39167 (1)

Vendor Advisories for CVE-2021-39167 (1)

Other References for CVE-2021-39167 (1)

IV. Related Vulnerabilities

Same product: openzeppelin-contracts
Same vendor: OpenZeppelin
Same weakness: CWE-269

V. Comments for CVE-2021-39167

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