openzeppelin/openzeppelin-contracts · Security
Improper Initialization in OpenZeppelin
- GHSA ID
- GHSA-88g8-f5mf-f5rj
- CVE ID
- CVE-2021-46320
- Severity
- high
- Published
- Updated
- CVSS
- 7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- CVSS v3
- 7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
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.
CWEs
- CWE-665 · Improper Initialization
References
- https://github.com/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-9c22-pwxw-p6hx ↗
- https://nvd.nist.gov/vuln/detail/CVE-2021-46320 ↗
- https://github.com/OpenZeppelin/openzeppelin-contracts/pull/3006 ↗
- https://github.com/OpenZeppelin/openzeppelin-contracts/releases/tag/v4.4.1 ↗
- https://github.com/advisories/GHSA-88g8-f5mf-f5rj ↗