{
  "id": "CVE-2021-39228",
  "sourceIdentifier": "security-advisories@github.com",
  "published": "2021-09-17T14:15:08.413",
  "lastModified": "2021-09-30T19:02:35.443",
  "vulnStatus": "Analyzed",
  "descriptions": [
    {
      "lang": "en",
      "value": "Tremor is an event processing system for unstructured data. A vulnerability exists between versions 0.7.2 and 0.11.6. This vulnerability is a memory safety Issue when using `patch` or `merge` on `state` and assign the result back to `state`. In this case, affected versions of Tremor and the tremor-script crate maintains references to memory that might have been freed already. And these memory regions can be accessed by retrieving the `state`, e.g. send it over TCP or HTTP. This requires the Tremor server (or any other program using tremor-script) to execute a tremor-script script that uses the mentioned language construct. The issue has been patched in version 0.11.6 by removing the optimization and always cloning the target expression of a Merge or Patch. If an upgrade is not possible, a possible workaround is to avoid the optimization by introducing a temporary variable and not immediately reassigning to `state`."
    },
    {
      "lang": "es",
      "value": "Tremor es un sistema de procesamiento de eventos para datos no estructurados. Se presenta una vulnerabilidad entre las versiones 0.7.2 y 0.11.6. Esta vulnerabilidad es un problema de seguridad de memoria cuando es usado \"patch\" o \"merge\" en \"state\" y se asigna el resultado de nuevo a \"state\". En este caso, las versiones afectadas de Tremor y el crate tremor-script mantienen referencias a la memoria que podr\u00edan haber sido liberadas ya. Y estas regiones de memoria pueden ser accedidas al recuperar el \"state\", por ejemplo, envi\u00e1ndolo por TCP o HTTP. Esto requiere que el servidor Tremor (o cualquier otro programa usando tremor-script) ejecute un script tremor-script que use la construcci\u00f3n de lenguaje mencionada. El problema ha sido parcheado en la versi\u00f3n 0.11.6, al eliminar la optimizaci\u00f3n y clonando siempre la expresi\u00f3n de destino de una Fusi\u00f3n o Parche. Si no es posible una actualizaci\u00f3n, una posible soluci\u00f3n es evitar la optimizaci\u00f3n introduciendo una variable temporal y no reasignando inmediatamente a \"state\""
    }
  ],
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          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL"
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        "exploitabilityScore": 3.9,
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        "baseSeverity": "HIGH",
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  "weaknesses": [
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  "references": [
    {
      "url": "https://github.com/tremor-rs/tremor-runtime/commit/1a2efcdbe68e5e7fd0a05836ac32d2cde78a0b2e",
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      "url": "https://github.com/tremor-rs/tremor-runtime/security/advisories/GHSA-mc22-5q92-8v85",
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}