CVE-2022-23636

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If it is not possible to upgrade to version 0.34.1 or 0.33.1 of the `wasmtime` crate, it is recommend that support for the reference types proposal be disabled by passing `false` to `Config::wasm_reference_types`. Doing so will prevent modules that use `externref` from being loaded entirely."}, {"lang": "es", "value": "Wasmtime es un tiempo de ejecuci\u00f3n de c\u00f3digo abierto para WebAssembly y WASI. En versiones anteriores a 0.34.1 y 0.33.1, se presenta un error en el asignador de instancias de pool en el tiempo de ejecuci\u00f3n de Wasmtime donde un fallo al instanciar una instancia para un m\u00f3dulo que define un \"externref\" global resultar\u00e1 en una ca\u00edda inv\u00e1lida de un \"VMExternRef\" por medio de un puntero no inicializado. Para que una instancia sea vulnerable a este problema deben cumplirse una serie de condiciones enumeradas en el aviso de seguridad de GitHub. Los mantenedores creen que el impacto efectivo de este bug es relativamente peque\u00f1o porque el uso de \"externref\" sigue siendo poco com\u00fan y sin un limitador de recursos configurado en el \"Store\", que no es la configuraci\u00f3n por defecto, s\u00f3lo es posible desencadenar el bug desde un error devuelto por \"mprotect\" o \"VirtualAlloc\". Tenga en cuenta que en Linux con la funcionalidad \"uffd\" habilitada, s\u00f3lo es posible desencadenar el fallo desde un limitador de recursos, ya que es omitida la llamada a \"mprotect\". El bug ha sido corregido en las versiones 0.34.1 y 0.33.1 y es recomendado a usuarios actualizar lo antes posible. Si no es posible actualizar a versi\u00f3n 0.34.1 o 0.33.1 del crate \"wasmtime\", es recomendado deshabilitar el soporte de la propuesta de tipos de referencia pasando \"false\" a \"Config::wasm_reference_types\". 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