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CVE-2024-53861

CVE-2024-53861 · Issuer field partial matches allowed in pyjwt

Esta página presenta datos de fuentes públicas de vulnerabilidades. Consulta el aviso original antes de actualizar.

pyjwt is a JSON Web Token implementation in Python. An incorrect string comparison is run for `iss` checking, resulting in `"acb"` being accepted for `"_abc_"`. This is a bug introduced in version 2.10.0: checking the "iss" claim changed from `isinstance(issuer, list)` to `isinstance(issuer, Sequence)`. Since str is a Sequnce, but not a list, `in` is also used for string comparison. This results in `if "abc" not in "__abcd__":` being checked instead of `if "abc" != "__abc__":`. Signature checks are still present so real world impact is likely limited to denial of service scenarios. This issue has been patched in version 2.10.1. All users are advised to upgrade. There are no known workarounds for this vulnerability.

CVSS 2.2 · Baja · EPSS 0,8% · Corrección disponible

Publicación
Actualización

Pila tecnológica: python

Productos y versiones afectados

  • pyjwt

    Versiones
    • = 2.10.0: Afectada

    Sin corrección publicada

  • pyjwt PyPI

    Versiones
    • 2.10.0
    Intervalos de versiones afectados
    • ECOSYSTEM: ≥ 2.10.0, < 2.10.1

    Actualiza a 2.10.1

Fuentes originales

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