[@openzeppelin/contracts-upgradeable] UUPSUpgradeable vulnerability in @openzeppelin/contracts

Impact

Upgradeable contracts using UUPSUpgradeable may be vulnerable to an attack affecting uninitialized implementation contracts. We will update this advisory with more information soon.

Patches

A fix is included in version 4.3.2 of @openzeppelin/contracts and @openzeppelin/contracts-upgradeable.

Workarounds

Initialize implementation contracts using UUPSUpgradeable by invoking the initializer function (usually called initialize). An example is provided in the forum.

References

Post-mortem.

For more information

If you have any questions or comments about this advisory, or need assistance executing the mitigation, email us at security@openzeppelin.com.

References

• https://github.com/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-5vp3-v4hc-gx76
• https://nvd.nist.gov/vuln/detail/CVE-2021-41264
• https://github.com/OpenZeppelin/openzeppelin-contracts/commit/024cc50df478d2e8f78539819749e94d6df60592
• https://forum.openzeppelin.com/t/security-advisory-initialize-uups-implementation-contracts/15301
• https://github.com/advisories/GHSA-5vp3-v4hc-gx76