CVE-2021-46320GHSA-9C22-PWXW-P6HXGHSA-88G8-F5MF-F5RJ
In OpenZeppelin <=v4.4.0, initializer functions that are invoked separate from contract creation (the most prominent example being minimal p
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 4.4.1
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
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.
Timeline
- CVE published
- Record last updated
Affected versions
- n/a n/a
Version range not reported
- @openzeppelin/contractsnpm
From 3.2.0 · fixed in 4.4.1
- @openzeppelin/contracts-upgradeablenpm
From 3.2.0 · fixed in 4.4.1
- @openzeppelin/contractsnpm
fixed in 4.4.1