Vulnerability · Published Dec 8, 2023 · Assigned by GitHub_M
CVE-2023-49798Duplicated execution of subcalls in OpenZeppelin Contracts
Medium 5.9
In plain English
A medium-severity security flaw in openzeppelin-contracts from OpenZeppelin. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 46% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | @openzeppelin/contracts | 4.9.5 | GHSA-699g-q6qh-q4v8 |
| npm | @openzeppelin/contracts-upgradeable | 4.9.5 | GHSA-699g-q6qh-q4v8 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| OpenZeppelin | openzeppelin-contracts | = 4.9.4 |
Weakness: CWE-670 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N