// For flags

CVE-2024-27094

OpenZeppelin Contracts base64 encoding may read from potentially dirty memory

Severity Score

6.5
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track
*SSVC
Descriptions

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.

OpenZeppelin Contracts es una librería para el desarrollo seguro de contratos inteligentes. La función `Base64.encode` codifica una entrada de `bytes` iterándola en fragmentos de 3 bytes. Cuando esta entrada no es múltiplo de 3, la última iteración puede leer partes de la memoria que están más allá del búfer de entrada. La vulnerabilidad se solucionó en 5.0.2 y 4.9.6.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
None
Availability
Partial
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2024-02-19 CVE Reserved
  • 2024-02-29 CVE Published
  • 2024-03-01 EPSS Updated
  • 2024-08-02 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-125: Out-of-bounds Read
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"
 Openzeppelin-contracts
Search vendor "OpenZeppelin" for product "Openzeppelin-contracts"
 >= 4.5.0 < 4.9.6
Search vendor "OpenZeppelin" for product "Openzeppelin-contracts" and version " >= 4.5.0 < 4.9.6"
en
Affected
OpenZeppelin
Search vendor "OpenZeppelin"
 Openzeppelin-contracts
Search vendor "OpenZeppelin" for product "Openzeppelin-contracts"
 >= 5.0.0 < 5.0.2
Search vendor "OpenZeppelin" for product "Openzeppelin-contracts" and version " >= 5.0.0 < 5.0.2"
en
Affected