id: PYSEC-2024-89
modified: 2024-09-23T21:22:09.689786Z
published: 2024-09-17T19:15:00Z
aliases:
- CVE-2024-8948
- GHSA-vh3x-525m-jp4r
details: A vulnerability was found in MicroPython 1.23.0. It has been rated as critical.
  Affected by this issue is the function mpz_as_bytes of the file py/objint.c. The
  manipulation leads to heap-based buffer overflow. The attack may be launched remotely.
  The exploit has been disclosed to the public and may be used. The patch is identified
  as 908ab1ceca15ee6fd0ef82ca4cba770a3ec41894. It is recommended to apply a patch
  to fix this issue. In micropython objint component, converting zero from int to
  bytes leads to heap buffer-overflow-write at mpz_as_bytes.
affected:
- package:
    ecosystem: PyPI
    name: micropython-os
    purl: pkg:pypi/micropython-os
  ranges:
  - type: GIT
    events:
    - introduced: "0"
    - fixed: 908ab1ceca15ee6fd0ef82ca4cba770a3ec41894
    repo: https://github.com/micropython/micropython
  - type: ECOSYSTEM
    events:
    - introduced: "0"
  versions:
  - 0.2.3
  - 0.2.4
  - "0.3"
  - 0.3.1
  - 0.4.1
  - 0.4.2
  - 0.4.3
  - 0.4.4
  - "0.6"
  - "0.7"
  - 0.7.1
  - "0.8"
severity:
- type: CVSS_V3
  score: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
references:
- type: WEB
  url: https://vuldb.com/?id.277766
- type: WEB
  url: https://vuldb.com/?ctiid.277766
- type: WEB
  url: https://vuldb.com/?submit.409317
- type: EVIDENCE
  url: https://github.com/micropython/micropython/issues/13041
- type: REPORT
  url: https://github.com/micropython/micropython/issues/13041
- type: FIX
  url: 
    https://github.com/micropython/micropython/commit/908ab1ceca15ee6fd0ef82ca4cba770a3ec41894
- type: ADVISORY
  url: https://github.com/advisories/GHSA-vh3x-525m-jp4r