Description
OpenZeppelin Contracts is a library for smart contract development. A merge issue when porting the 5.0.1 patch to the 4.9 branch caused a line duplication. In the version of `Multicall.sol` released in `@openzeppelin/contracts@4.9.4` and `@openzeppelin/contracts-upgradeable@4.9.4`, all subcalls are executed twice. Concretely, this exposes a user to unintentionally duplicate operations like asset transfers. The duplicated delegatecall was removed in version 4.9.5. The 4.9.4 version is marked as deprecated. Users are advised to upgrade. There are no known workarounds for this issue.
Remediation
References
https://github.com/OpenZeppelin/openzeppelin-contracts/commit/88ac712e06832bce73b41e8166cded2729e25205
https://github.com/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-699g-q6qh-q4v8
Related Vulnerabilities
CVE-2021-32659 Vulnerability in npm package matrix-appservice-bridge
CVE-2020-7739 Vulnerability in npm package phantomjs-seo
CVE-2020-26245 Vulnerability in npm package systeminformation
CVE-2019-16761 Vulnerability in npm package slp-validate
CVE-2023-32695 Vulnerability in npm package socket.io-parser