CVE-2021-46320
High
Description
In OpenZeppelin <=v4.4.0, initializer functions that are invoked separate from contract creation (the most prominent example being minimal proxies) may be reentered if they make an untrusted non-view external call. Once an initializer has finished running it can never be re-executed. However, an exception put in place to support multiple inheritance made reentrancy possible, breaking the expectation that there is a single execution.
SeverityHigh
CVSS7.5
Exploit probability—
ProductOpenzeppelin
PublishedFeb 4, 2022
First seenFeb 4, 2022
How to fix
Update
- @openzeppelin/contracts4.4.1 or later
- @openzeppelin/contracts-upgradeable4.4.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| openzeppelin openzeppelin | 3.2.0 ≤ v ≤ 4.4.0 | — |
| @openzeppelin/contractsnpm | v < 4.4.1, 3.2.0 ≤ v < 4.4.1 | 4.4.1 |
| @openzeppelin/contracts-upgradeablenpm | 3.2.0 ≤ v < 4.4.1 | 4.4.1 |
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