CVE-2023-32675 Nonpayable default functions are sometimes payable in vyper

2023-05-1919:46:18

CWE-670

GitHub_M

www.cve.org

cve-2023-32675

vyper

ethereum

smart contract

vulnerability

calldatasize check

upgrade

3.7 Low

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

NONE

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

0.001 Low

EPSS

Percentile

29.0%

JSON

Vyper is a pythonic Smart Contract Language for the ethereum virtual machine. In contracts with more than one regular nonpayable function, it is possible to send funds to the default function, even if the default function is marked nonpayable. This applies to contracts compiled with vyper versions prior to 0.3.8. This issue was fixed by the removal of the global calldatasize check in commit 02339dfda. Users are advised to upgrade to version 0.3.8. Users unable to upgrade should avoid use of nonpayable default functions.

CNA Affected

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