UUPSUpgradeable vulnerability in OpenZeppelin Contracts
CVE-2021-41264

9.8CRITICAL

Key Information:

Vendor

Openzeppelin

Status
Openzeppelin-contracts
Vendor
CVE Published:
12 November 2021

What is CVE-2021-41264?

OpenZeppelin Contracts is a library for smart contract development. In affected versions upgradeable contracts using UUPSUpgradeable may be vulnerable to an attack affecting uninitialized implementation contracts. A fix is included in version 4.3.2 of @openzeppelin/contracts and @openzeppelin/contracts-upgradeable. For users unable to upgrade; initialize implementation contracts using UUPSUpgradeable by invoking the initializer function (usually called initialize). An example is provided in the forum.

Affected Version(s)

openzeppelin-contracts >= 4.1.0 < 4.3.2

References

https://github.com/OpenZeppelin/openzeppelin-contracts/se...
x_refsource_CONFIRM
https://github.com/OpenZeppelin/openzeppelin-contracts/co...
x_refsource_MISC
https://forum.openzeppelin.com/t/security-advisory-initia...
x_refsource_MISC

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.