id: PYSEC-2024-207
modified: 2025-01-19T19:19:01.605918Z
published: 2024-04-25T18:15:08Z
aliases:
- CVE-2024-32646
- GHSA-r56x-j438-vw5m
details: |+
  Vyper is a pythonic Smart Contract Language for the Ethereum virtual machine. In versions 0.3.10 and prior, using the `slice` builtin can result in a double eval vulnerability when the buffer argument is either `msg.data`, `self.code` or `<address>.code` and either the `start` or `length` arguments have side-effects. It can be easily triggered only with the versions `<0.3.4` as `0.3.4` introduced the unique symbol fence. No vulnerable production contracts were found. Additionally, double evaluation of side-effects should be easily discoverable in client tests. As such, the impact is low. As of time of publication, no fixed versions are available.

affected:
- package:
    ecosystem: PyPI
    name: vyper
    purl: pkg:pypi/vyper
  ranges:
  - type: ECOSYSTEM
    events:
    - introduced: "0"
    - fixed: 0.4.0
  versions:
  - 0.1.0b1
  - 0.1.0b10
  - 0.1.0b11
  - 0.1.0b12
  - 0.1.0b13
  - 0.1.0b14
  - 0.1.0b15
  - 0.1.0b16
  - 0.1.0b17
  - 0.1.0b2
  - 0.1.0b3
  - 0.1.0b4
  - 0.1.0b5
  - 0.1.0b6
  - 0.1.0b7
  - 0.1.0b8
  - 0.1.0b9
  - 0.2.1
  - 0.2.10
  - 0.2.11
  - 0.2.12
  - 0.2.13
  - 0.2.14
  - 0.2.15
  - 0.2.16
  - 0.2.2
  - 0.2.3
  - 0.2.4
  - 0.2.5
  - 0.2.6
  - 0.2.7
  - 0.2.8
  - 0.2.9
  - 0.3.0
  - 0.3.1
  - 0.3.10
  - 0.3.10rc1
  - 0.3.10rc2
  - 0.3.10rc3
  - 0.3.10rc4
  - 0.3.10rc5
  - 0.3.2
  - 0.3.3
  - 0.3.4
  - 0.3.5
  - 0.3.6
  - 0.3.7
  - 0.3.8
  - 0.3.9
  - 0.4.0b1
  - 0.4.0b2
  - 0.4.0b3
  - 0.4.0b4
  - 0.4.0b5
  - 0.4.0b6
  - 0.4.0rc1
  - 0.4.0rc2
  - 0.4.0rc3
  - 0.4.0rc4
  - 0.4.0rc5
  - 0.4.0rc6
severity:
- type: CVSS_V3
  score: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
references:
- type: ADVISORY
  url: https://github.com/vyperlang/vyper/security/advisories/GHSA-r56x-j438-vw5m
- type: ADVISORY
  url: https://github.com/advisories/GHSA-r56x-j438-vw5m