CVE-2023-42460 _abi_decode input not validated in complex expressions in Vyper

2023-09-2618:47:09

CWE-682

GitHub_M

www.cve.org

vyper

smart contract language

evm

_abi_decode

input validation

security issue

bounds checking

release 0.3.10

pull request #3626

5.3 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

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

0.0005 Low

EPSS

Percentile

18.0%

JSON

Vyper is a Pythonic Smart Contract Language for the EVM. The _abi_decode() function does not validate input when it is nested in an expression. Uses of _abi_decode() can be constructed which allow for bounds checking to be bypassed resulting in incorrect results. This issue has not yet been fixed, but a fix is expected in release 0.3.10. Users are advised to reference pull request #3626.

CNA Affected

[
  {
    "vendor": "vyperlang",
    "product": "vyper",
    "versions": [
      {
        "version": ">= 0.3.4, < 0.3.10",
        "status": "affected"
      }
    ]
  }
]