Headline
CVE-2022-39384: Update initializer modifier to prevent reentrancy during initialization by Amxx · Pull Request #3006 · OpenZeppelin/openzeppelin-contracts
OpenZeppelin Contracts is a library for secure smart contract development. Before version 4.4.1 but after 3.2.0, 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 in the scenario described above, breaking the expectation that there is a single execution. Note that upgradeable proxies are commonly initialized together with contract creation, where reentrancy is not feasible, so the impact of this issue is believed to be minor. This issue has been patched, please upgrade to version 4.4.1. As a workaround, avoid untrusted external calls during initialization.
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frangio changed the title update initializer contract to prevent reentry during initialization Update initializer modifier to prevent reentrancy during initialization
Dec 7, 2021
frangio added a commit that referenced this pull request
Dec 10, 2021
…on (#3006)
Co-authored-by: Francisco Giordano [email protected] (cherry picked from commit 08840b9)
Amxx deleted the refactor/initialize branch
Dec 10, 2021
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refactor(protocol): mark init function as “internal” in OwnableUpgradeable refactor(protocol): rename “__OwnableUpgradeable_init” to “__Ownable_init” test(protocol): new GodModeOwnableUpgradeable to expose init function
See releated discussion in OpenZeppelin/openzeppelin-contracts#3006
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