CVE-2022-35961
First published: Mon Aug 15 2022(Updated: )
OpenZeppelin Contracts is a library for secure smart contract development. The functions `ECDSA.recover` and `ECDSA.tryRecover` are vulnerable to a kind of signature malleability due to accepting EIP-2098 compact signatures in addition to the traditional 65 byte signature format. This is only an issue for the functions that take a single `bytes` argument, and not the functions that take `r, v, s` or `r, vs` as separate arguments. The potentially affected contracts are those that implement signature reuse or replay protection by marking the signature itself as used rather than the signed message or a nonce included in it. A user may take a signature that has already been submitted, submit it again in a different form, and bypass this protection. The issue has been patched in 4.7.3.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Openzeppelin Contracts | >=4.1.0<4.7.3 | |
| Openzeppelin Contracts Upgradeable | >=4.1.0<4.7.3 |
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Reference Links
Frequently Asked Questions
What is the vulnerability ID of this issue?
This issue has the vulnerability ID CVE-2022-35961.
What is OpenZeppelin Contracts?
OpenZeppelin Contracts is a library for secure smart contract development.
Which functions are vulnerable?
The functions ECDSA.recover and ECDSA.tryRecover are vulnerable.
What is the cause of the vulnerability?
The vulnerability is caused by accepting EIP-2098 compact signatures in addition to the traditional 65 byte signature format.
What versions of OpenZeppelin Contracts are affected?
Versions 4.1.0 through 4.7.3 of OpenZeppelin Contracts are affected.
What is the severity of this vulnerability?
This vulnerability has a severity rating of 6.5 (high).
What is the Common Weakness Enumeration (CWE) ID for this vulnerability?
The CWE ID for this vulnerability is 354.
How can I fix this vulnerability?
To fix this vulnerability, update to OpenZeppelin Contracts version 4.7.3 or higher.
Where can I find more information about this vulnerability?
You can find more information about this vulnerability in the following references: [Reference 1](https://github.com/OpenZeppelin/openzeppelin-contracts/pull/3610), [Reference 2](https://github.com/OpenZeppelin/openzeppelin-contracts/releases/tag/v4.7.3), [Reference 3](https://github.com/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-4h98-2769-gh6h).
- collector/nvd-index
- vendor/openzeppelin
- canonical/openzeppelin contracts
- version/openzeppelin contracts/4.1.0
- canonical/openzeppelin contracts upgradeable
- version/openzeppelin contracts upgradeable/4.1.0