CVE-2023-49798

Duplicated execution of subcalls in OpenZeppelin Contracts

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.

Category

5.9
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.38%
Vendor Advisory github.com
Affected: OpenZeppelin openzeppelin-contracts
Published at:
Updated at:

References

Link Tags
https://github.com/OpenZeppelin/openzeppelin-contracts/security/advisories/GHSA-699g-q6qh-q4v8 vendor advisory
https://github.com/OpenZeppelin/openzeppelin-contracts/commit/88ac712e06832bce73b41e8166cded2729e25205 patch

Frequently Asked Questions

What is the severity of CVE-2023-49798?
CVE-2023-49798 has been scored as a medium severity vulnerability.
How to fix CVE-2023-49798?
To fix CVE-2023-49798, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-49798 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-49798 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-49798?
CVE-2023-49798 affects OpenZeppelin openzeppelin-contracts.
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