OpenZeppelin Contracts's SignatureChecker may revert on invalid EIP-1271 signers

高 7.5CVE-2022-31172 · GHSA-4g63-c64m-25w9 · 22/07/2022 公開 · 17/06/2026 更新

要点

CVE-2022-31172 は contracts (openzeppelin), @openzeppelin/contracts, @openzeppelin/contracts-upgradeable に影響する深刻度「高」 (CVSS 7.5) の脆弱性です。
今後30日間に悪用される確率（EPSS）：0.50%（全脆弱性の 43.0% より高い）。
対処：4.7.1 以降に更新してください。

パッケージ	影響を受けるバージョン	修正済みバージョン
contracts openzeppelin	`≥ 4.1.0, < 4.7.1`	`4.7.1`
@openzeppelin/contracts npm	`≥ 4.1.0, < 4.7.1`	`4.7.1`
@openzeppelin/contracts-upgradeable npm	`≥ 4.1.0, < 4.7.1`	`4.7.1`

概要

Impact

SignatureChecker.isValidSignatureNow is not expected to revert. However, an incorrect assumption about Solidity 0.8's abi.decode allows some cases to revert, given a target contract that doesn't implement EIP-1271 as expected.

The contracts that may be affected are those that use SignatureChecker to check the validity of a signature and handle invalid signatures in a way other than reverting. We believe this to be unlikely.

Patches

The issue was patched in 4.7.1.

References

https://github.com/OpenZeppelin/openzeppelin-contracts/pull/3552

For more information

If you have any questions or comments about this advisory, or need assistance deploying the fix, email us at [email protected].

NVD の説明

OpenZeppelin Contracts is a library for smart contract development. Versions 4.1.0 until 4.7.1 are vulnerable to the SignatureChecker reverting. `SignatureChecker.isValidSignatureNow` is not expected to revert. However, an incorrect assumption about Solidity 0.8's `abi.decode` allows some cases to revert, given a target contract that doesn't implement EIP-1271 as expected. The contracts that may be affected are those that use `SignatureChecker` to check the validity of a signature and handle invalid signatures in a way other than reverting. The issue was patched in version 4.7.1.