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CVE-2017-11136

Estado: ModificadaMedia (6.5)—

An issue was discovered in heinekingmedia StashCat through 1.7.5 for Android, through 0.0.80w for Web, and through 0.0.86 for Desktop. It uses RSA to exchange a secret for symmetric encryption of messages. However, the private RSA key is not only stored on the client but transmitted to the backend, too. Moreover, the key to decrypt the private key is composed of the first 32 bytes of the SHA-512 hash of the user password. But this hash is stored on the backend, too. Therefore, everyone with access to the backend database can read the transmitted secret for symmetric encryption, hence can read the communication.

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)

Stashcat — Heinekingmedia

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2017-11136",
  "cveTags": [],
  "metrics": {
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 4,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:S/C:P/I:N/A:N",
          "authentication": "SINGLE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
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          "baseScore": 6.5,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
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        "impactScore": 3.6,
        "exploitabilityScore": 2.8
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  "affected": [
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      "affectedData": [
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          "vendor": "n/a",
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          "versions": [
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              "status": "affected",
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  "published": "2017-08-01T14:29:00.610",
  "references": [
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      "url": "http://seclists.org/fulldisclosure/2017/Jul/90",
      "tags": [
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        "Third Party Advisory"
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  "vulnStatus": "Modified",
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      "description": [
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "An issue was discovered in heinekingmedia StashCat through 1.7.5 for Android, through 0.0.80w for Web, and through 0.0.86 for Desktop. It uses RSA to exchange a secret for symmetric encryption of messages. However, the private RSA key is not only stored on the client but transmitted to the backend, too. Moreover, the key to decrypt the private key is composed of the first 32 bytes of the SHA-512 hash of the user password. But this hash is stored on the backend, too. Therefore, everyone with access to the backend database can read the transmitted secret for symmetric encryption, hence can read the communication."
    },
    {
      "lang": "es",
      "value": "Se ha descubierto un error en la versión 1.7.5 de heinekingmedia StashCat para Android, en la versión 0.0.80w para web, y 0.0.86 para ordenador. Se utiliza RSA para intercambiar un secreto para el cifrado simétrico de los mensajes. Sin embargo, la clave privada RSA no solo se almacena en el lado del cliente, sino que también se transmite al backend. Además, la clave necesaria para descifrar la clave privada está compuesta de los primeros 32 bytes del hash SHA-512 de la contraseña del usuario, pero este hash también está almacenado en el backend. Por ello, cualquier usuario que tenga acceso a la base de datos del backend puede leer el secreto que se transmite para el cifrado simétrico y, por lo tanto, puede leer la comunicación."
    }
  ],
  "lastModified": "2026-06-17T01:01:17.207",
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