CVE-2024-27094

Severity CVSS v4.0:

Pending analysis

Type:

CWE-125 Out-of-bounds Read

Publication date:

21/03/2024

Last modified:

04/12/2025

Description

OpenZeppelin Contracts is a library for secure smart contract development. The `Base64.encode` function encodes a `bytes` input by iterating over it in chunks of 3 bytes. When this input is not a multiple of 3, the last iteration may read parts of the memory that are beyond the input buffer. The vulnerability is fixed in 5.0.2 and 4.9.6.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H CVSS v3.1 Severity and Metrics:

Base Score: 6.50 MEDIUM
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): Low
Availability (A): High

Base Score 3.x

6.50

Severity 3.x

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:openzeppelin:contracts::::::node.js::*	4.5.0 (including)	4.9.6 (excluding)
cpe:2.3:a:openzeppelin:contracts::::::node.js::*	5.0.0 (including)	5.0.2 (excluding)
cpe:2.3:a:openzeppelin:contracts_upgradeable::::::node.js::*	4.5.0 (including)	4.9.6 (including)
cpe:2.3:a:openzeppelin:contracts_upgradeable::::::node.js::*	5.0.0 (including)	5.0.2 (excluding)

To consult the complete list of CPE names with products and versions, see this page

CVE-2024-27094

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools