CVE-2022-35961

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Las funciones \"ECDSA.recover\" y \"ECDSA.tryRecover\" son vulnerables a un tipo de maleabilidad de la firma debido a que aceptan firmas compactas EIP-2098 adem\u00e1s del formato de firma tradicional de 65 bytes. Esto s\u00f3lo es un problema para las funciones que toman un \u00fanico argumento \"bytes\", y no las funciones que toman \"r, v, s\" o \"r, vs\" como argumentos separados. Los contratos potencialmente afectados son los que implementan el re\u00faso de la firma o la protecci\u00f3n contra repeticiones al marcar la propia firma como usada en lugar del mensaje firmado o un nonce incluido en \u00e9l. Un usuario puede tomar una firma que ya ha sido enviada, enviarla de nuevo en una forma diferente, y omitir esta protecci\u00f3n. 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