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Vulnerability CVE-2021-46320
Published: 2022-02-04
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. |
Type:
CWE-665 (Improper Initialization)
CVSS2 => (AV:N/AC:L/Au:N/C:N/I:P/A:N)
CVSS Base Score |
Impact Subscore |
Exploitability Subscore |
5/10 |
2.9/10 |
10/10 |
Exploit range |
Attack complexity |
Authentication |
Remote |
Low |
No required |
Confidentiality impact |
Integrity impact |
Availability impact |
None |
Partial |
None |
References: |
https://github.com/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-9c22-pwxw-p6hx
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