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CVE-2023-41050

Estado: ModificadaAlta (7.7)—

AccessControl provides a general security framework for use in Zope. Python's "format" functionality allows someone controlling the format string to "read" objects accessible (recursively) via attribute access and subscription from accessible objects. Those attribute accesses and subscriptions use Python's full blown `getattr` and `getitem`, not the policy restricted `AccessControl` variants `_getattr_` and `_getitem_`. This can lead to critical information disclosure. `AccessControl` already provides a safe variant for `str.format` and denies access to `string.Formatter`.

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However, `str.format_map` is still unsafe. Affected are all users who allow untrusted users to create `AccessControl` controlled Python code and execute it. A fix has been introduced in versions 4.4, 5.8 and 6.2. Users are advised to upgrade. There are no known workarounds for this vulnerability.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (2)

Zope — AccesscontrolZope — Zope

CWE

Referencias

JSON original (NVD)

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          "options": [
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              "exploitation": "none"
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              "automatable": "no"
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              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2024-09-26T14:47:49.544178Z"
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  "published": "2023-09-06T18:15:08.847",
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      "tags": [
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      "url": "https://github.com/zopefoundation/AccessControl/security/advisories/GHSA-8xv7-89vj-q48c",
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  "vulnStatus": "Modified",
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      "description": [
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          "lang": "en",
          "value": "CWE-200"
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "AccessControl provides a general security framework for use in Zope. Python's \"format\" functionality allows someone controlling the format string to \"read\" objects accessible (recursively) via attribute access and subscription from accessible objects. Those attribute accesses and subscriptions use Python's full blown `getattr` and `getitem`, not the policy restricted `AccessControl` variants `_getattr_` and `_getitem_`. This can lead to critical information disclosure. `AccessControl` already provides a safe variant for `str.format` and denies access to `string.Formatter`. However, `str.format_map` is still unsafe. Affected are all users who allow untrusted users to create `AccessControl` controlled Python code and execute it. A fix has been introduced in versions 4.4, 5.8 and 6.2. Users are advised to upgrade. There are no known workarounds for this vulnerability."
    },
    {
      "lang": "es",
      "value": "AccessControl proporciona un marco de seguridad general para su uso en Zope. La funcionalidad \"format\" de Python permite que alguien que controle la cadena de formato \"lea\" objetos accesibles (recursivamente) mediante acceso a atributos y suscripción desde objetos accesibles. Esos accesos a atributos y suscripciones utilizan las variantes `getattr` y `getitem` completas de Python, no las variantes `_getattr_` y `_getitem_` restringidas por políticas de `AccessControl`. Esto puede conducir a la divulgación de información crítica. `AccessControl` ya proporciona una variante segura para `str.format` y niega el acceso a `string.Formatter`. Sin embargo, `str.format_map` todavía no es seguro. Los afectados son todos los usuarios que permiten a usuarios no confiables crear código Python controlado por `AccessControl` y ejecutarlo. Se ha introducido una solución en las versiones 4.4, 5.8 y 6.2. Se recomienda a los usuarios que actualicen. No se conocen workarounds para esta vulnerabilidad."
    }
  ],
  "lastModified": "2026-06-17T06:20:18.200",
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