CVE-2023-31146

2023-05-1121:15:10

CWE-787

[email protected]

web.nvd.nist.gov

vyper

python

smart contract

ethereum

virtual machine

cve-2023-31146

security vulnerability

9.1 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

9.2 High

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

43.5%

JSON

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.

Affected configurations

Vulners

NVD

Node

vyperlangvyperRange<0.3.8

VendorProductVersionCPE
vyperlangvyper*cpe:2.3:a:vyperlang:vyper:*:*:*:*:*:*:*:*

Vendor	Product	Version	CPE
vyperlang	vyper	*	cpe:2.3:a:vyperlang:vyper::::::::

CNA Affected

[
  {
    "vendor": "vyperlang",
    "product": "vyper",
    "versions": [
      {
        "version": "< 0.3.8",
        "status": "affected"
      }
    ]
  }
]