Vulnerabilities > CVE-2023-31146 - Out-of-bounds Write vulnerability in Vyperlang Vyper

CVSS 9.1 - CRITICAL

Attack vector

NETWORK

Attack complexity

LOW

Privileges required

NONE

Confidentiality impact

NONE

Integrity impact

HIGH

Availability impact

HIGH

network

low complexity

vyperlang

CWE-787

critical

NVD

Published: 2023-05-11

Updated: 2023-08-02

Summary

Vyper is a Pythonic smart contract language for the Ethereum virtual machine. Prior to version 0.3.8, during codegen, the length word of a dynarray is written before the data, which can result in out-of-bounds array access in the case where the dynarray is on both the lhs and rhs of an assignment. The issue can cause data corruption across call frames. The expected behavior is to revert due to out-of-bounds array access. Version 0.3.8 contains a patch for this issue.

Vulnerable Configurations

Part	Description	Count
Application	Vyperlang Vyperlang Vyper 0.0.4 Vyperlang Vyper 0.1.0 Vyperlang Vyper 0.2.0 Vyperlang Vyper 0.2.1 Vyperlang Vyper 0.2.2 Vyperlang Vyper 0.2.3 Vyperlang Vyper 0.2.4 Vyperlang Vyper 0.2.5 Vyperlang Vyper 0.2.6 Vyperlang Vyper 0.2.7 Vyperlang Vyper 0.2.8 Vyperlang Vyper 0.2.9 Vyperlang Vyper 0.2.10 Vyperlang Vyper 0.2.11 Vyperlang Vyper 0.2.12 Vyperlang Vyper 0.2.13 Vyperlang Vyper 0.2.14 Vyperlang Vyper 0.2.15 Vyperlang Vyper 0.2.16 Vyperlang Vyper 0.3.0 Vyperlang Vyper 0.3.1 Vyperlang Vyper 0.3.2 Vyperlang Vyper 0.3.3 Vyperlang Vyper 0.3.4 Vyperlang Vyper 0.3.5 Vyperlang Vyper 0.3.6 Vyperlang Vyper 0.3.7	43

Common Weakness Enumeration (CWE)

CWE-787 - Out-of-bounds Write

Summary

Vulnerable Configurations

Common Weakness Enumeration (CWE)

References