Vulnerability Details : CVE-2021-46320
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.
Products affected by CVE-2021-46320
- cpe:2.3:a:openzeppelin:openzeppelin:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-46320
0.08%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 37 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-46320
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:P/A:N |
10.0
|
2.9
|
NIST | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N |
3.9
|
3.6
|
NIST |
CWE ids for CVE-2021-46320
-
The product does not initialize or incorrectly initializes a resource, which might leave the resource in an unexpected state when it is accessed or used.Assigned by: nvd@nist.gov (Primary)
References for CVE-2021-46320
-
https://github.com/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-9c22-pwxw-p6hx
Initializer reentrancy may lead to double initialization · Advisory · OpenZeppelin/openzeppelin-contracts · GitHubThird Party Advisory
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