Vulnerability in Openzeppelin
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.
Vulnerability class: Dirty Pipe (CVE-2022-0847)
EPSS: 0.012 (65.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
Affected products
- Openzeppelin
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-46320?
- CVE-2021-46320 is a high-severity vulnerability in Openzeppelin, classified under Improper Initialization. CVSS score: 7.5/10. Published 2022-02-04.
- How severe is CVE-2021-46320?
- High severity. CVSS v3 base score is 7.5 out of 10.