Duplicated execution of subcalls in OpenZeppelin Contracts
CVE-2023-49798

5.9MEDIUM

Key Information:

Vendor

OpenZeppelin

Status
openzeppelin-contracts
Vendor
CVE Published:
9 December 2023

What is CVE-2023-49798?

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.

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Deploy the Patch

Affected Version(s)

openzeppelin-contracts = 4.9.4

References

https://github.com/OpenZeppelin/openzeppelin-contracts/se...
x_refsource_CONFIRM
https://github.com/OpenZeppelin/openzeppelin-contracts/co...
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CVSS V3.1

Score:
5.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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