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CVE-2024-42367

Estado: AnalizadaMedia (4.8)—

aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. In versions on the 3.10 branch prior to version 3.10.2, static routes which contain files with compressed variants (`.gz` or `.br` extension) are vulnerable to path traversal outside the root directory if those variants are symbolic links. The server protects static routes from path traversal outside the root directory when `follow_symlinks=False` (default). It does this by resolving the requested URL to an absolute path and then checking that path relative to the root.

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However, these checks are not performed when looking for compressed variants in the `FileResponse` class, and symbolic links are then automatically followed when performing the `Path.stat()` and `Path.open()` to send the file. Version 3.10.2 contains a patch for the issue.

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 (1)

Aiohttp — Aiohttp

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2024-42367",
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          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
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              "automatable": "no"
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              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2024-08-09T18:18:15.360284Z"
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          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
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          "privilegesRequired": "NONE",
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      "url": "https://github.com/aio-libs/aiohttp/blob/e0ff5246e1d29b7710ab1a2bbc972b48169f1c05/aiohttp/web_fileresponse.py#L177",
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      "value": "aiohttp is an asynchronous HTTP client/server framework for asyncio and Python. In versions on the 3.10 branch prior to version 3.10.2, static routes which contain files with compressed variants (`.gz` or `.br` extension) are vulnerable to path traversal outside the root directory if those variants are symbolic links. The server protects static routes from path traversal outside the root directory when `follow_symlinks=False` (default).  It does this by resolving the requested URL to an absolute path and then checking that path relative to the root. However, these checks are not performed when looking for compressed variants in the `FileResponse` class, and symbolic links are then automatically followed when performing the `Path.stat()` and `Path.open()` to send the file. Version 3.10.2 contains a patch for the issue."
    },
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      "value": "aiohttp es un framework cliente/servidor HTTP asíncrono para asyncio y Python. Antes de la versión 3.10.2, las rutas estáticas que contienen archivos con variantes comprimidas (extensión `.gz` o `.br`) son vulnerables al path traversal fuera del directorio raíz si esas variantes son enlaces simbólicos. El servidor protege las rutas estáticas contra el path traversal fuera del directorio raíz cuando `follow_symlinks=False` (predeterminado). Para ello, resuelve la URL solicitada en una ruta absoluta y luego verifica esa ruta en relación con la raíz. Sin embargo, estas comprobaciones no se realizan cuando se buscan variantes comprimidas en la clase `FileResponse`, y los enlaces simbólicos se siguen automáticamente al realizar `Path.stat()` y `Path.open()` para enviar el archivo. La versión 3.10.2 contiene un parche para el problema."
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  "lastModified": "2026-06-17T07:49:20.270",
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