// For flags

CVE-2023-49798

Duplicated execution of subcalls in OpenZeppelin Contracts

Severity Score

7.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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.

OpenZeppelin Contracts es una librería para el desarrollo de contratos inteligentes. Un problema de fusión al migrar el parche 5.0.1 a la rama 4.9 provocó una duplicación de líneas. En la versión de `Multicall.sol` lanzada en `@openzeppelin/contracts@4.9.4` y `@openzeppelin/contracts-upgradeable@4.9.4`, todas las subllamadas se ejecutan dos veces. Concretamente, esto expone al usuario a operaciones duplicadas involuntariamente, como transferencias de activos. La llamada de delegado duplicada se eliminó en la versión 4.9.5. La versión 4.9.4 está marcada como obsoleta. Se recomienda a los usuarios que actualicen. No se conocen workarounds para este problema.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
None
Integrity
Complete
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2023-11-30 CVE Reserved
  • 2023-12-08 CVE Published
  • 2024-08-02 CVE Updated
  • 2025-01-09 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-670: Always-Incorrect Control Flow Implementation
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Openzeppelin
Search vendor "Openzeppelin"
 Contracts
Search vendor "Openzeppelin" for product "Contracts"
 4.9.4
Search vendor "Openzeppelin" for product "Contracts" and version "4.9.4"
node.js
Affected
Openzeppelin
Search vendor "Openzeppelin"
 Contracts Upgradeable
Search vendor "Openzeppelin" for product "Contracts Upgradeable"
 4.9.4
Search vendor "Openzeppelin" for product "Contracts Upgradeable" and version "4.9.4"
node.js
Affected