{
  "id": "CVE-2023-41325",
  "sourceIdentifier": "security-advisories@github.com",
  "published": "2023-09-15T20:15:10.800",
  "lastModified": "2023-09-22T19:07:17.333",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "OP-TEE is a Trusted Execution Environment (TEE) designed as companion to a non-secure Linux kernel running on Arm; Cortex-A cores using the TrustZone technology. Starting in version 3.20 and prior to version 3.22, `shdr_verify_signature` can make a double free. `shdr_verify_signature` used to verify a TA binary before it is loaded. To verify a signature of it, allocate a memory for RSA key. RSA key allocate function (`sw_crypto_acipher_alloc_rsa_public_key`) will try to allocate a memory (which is optee\u2019s heap memory). RSA key is consist of exponent and modulus (represent as variable `e`, `n`) and it allocation is not atomic way, so it may succeed in `e` but fail in `n`. In this case sw_crypto_acipher_alloc_rsa_public_key` will free on `e` and return as it is failed but variable \u2018e\u2019 is remained as already freed memory address . `shdr_verify_signature` will free again that memory (which is `e`) even it is freed when it failed allocate RSA key. A patch is available in version 3.22. No known workarounds are available."
    },
    {
      "lang": "es",
      "value": "OP-TEE es un Entorno de Ejecuci\u00f3n Confiable (TEE) dise\u00f1ado como complemento de un kernel de Linux no seguro que se ejecuta en Arm; N\u00facleos Cortex-A que utilizan la tecnolog\u00eda TrustZone. A partir de la versi\u00f3n 3.20 y anteriores a la versi\u00f3n 3.22, `shdr_verify_signature` puede hacer un doble libremente. `shdr_verify_signature` se usa para verificar un binario TA antes de cargarlo. Para verificar una firma del mismo, asigne una memoria para la clave RSA. La funci\u00f3n de asignaci\u00f3n de clave RSA (`sw_crypto_acipher_alloc_rsa_public_key`) intentar\u00e1 asignar una memoria (que es la memoria del mont\u00f3n del candidato). La clave RSA consta de exponente y m\u00f3dulo (representados como variables `e`, `n`) y su asignaci\u00f3n no es de forma at\u00f3mica, por lo que puede tener \u00e9xito en `e` pero fallar en `n`. En este caso, sw_crypto_acipher_alloc_rsa_public_key` se liberar\u00e1 en `e` y regresar\u00e1 cuando fall\u00f3, pero la variable \u201ce\u201d permanece como direcci\u00f3n de memoria ya liberada. `shdr_verify_signature` liberar\u00e1 nuevamente esa memoria (que es `e`), incluso si se libera cuando no se pudo asignar la clave RSA. Hay un parche disponible en la versi\u00f3n 3.22. No hay workarounds conocidos disponibles."
    }
  ],
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        "type": "Primary",
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          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "HIGH",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
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          "baseScore": 6.7,
          "baseSeverity": "MEDIUM"
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        "exploitabilityScore": 0.8,
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          "userInteraction": "REQUIRED",
          "scope": "CHANGED",
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  "weaknesses": [
    {
      "source": "security-advisories@github.com",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-415"
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  "references": [
    {
      "url": "https://github.com/OP-TEE/optee_os/commit/e2ec831cb07ed0099535c7c140cb6338aa62816a",
      "source": "security-advisories@github.com",
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      "source": "security-advisories@github.com",
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}