fkie_cve-2024-38537
Vulnerability from fkie_nvd
Published
2024-07-02 20:15
Modified
2025-09-02 20:27
Severity ?
0.0 (None) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
Fides is an open-source privacy engineering platform. `fides.js`, a client-side script used to interact with the consent management features of Fides, used the `polyfill.io` domain in a very limited edge case, when it detected a legacy browser such as IE11 that did not support the fetch standard. Therefore it was possible for users of legacy, pre-2017 browsers who navigate to a page serving `fides.js` to download and execute malicious scripts from the `polyfill.io` domain when the domain was compromised and serving malware. No exploitation of `fides.js` via `polyfill.io` has been identified as of time of publication. The vulnerability has been patched in Fides version `2.39.1`. Users are advised to upgrade to this version or later to secure their systems against this threat. On Thursday, June 27, 2024, Cloudflare and Namecheap intervened at a domain level to ensure `polyfill.io` and its subdomains could not resolve to the compromised service, rendering this vulnerability unexploitable. Prior to the domain level intervention, there were no server-side workarounds and the confidentiality, integrity, and availability impacts of this vulnerability were high. Clients could ensure they were not affected by using a modern browser that supported the fetch standard.
References
security-advisories@github.comhttps://fetch.spec.whatwg.orgProduct
security-advisories@github.comhttps://github.com/ethyca/fides/commit/868c4d629760572192bd61db34f5a4458ed12005Patch
security-advisories@github.comhttps://github.com/ethyca/fides/pull/5026Patch, Issue Tracking
security-advisories@github.comhttps://github.com/ethyca/fides/security/advisories/GHSA-cvw4-c69g-7v7mPatch, Third Party Advisory
security-advisories@github.comhttps://sansec.io/research/polyfill-supply-chain-attackProduct
af854a3a-2127-422b-91ae-364da2661108https://fetch.spec.whatwg.orgProduct
af854a3a-2127-422b-91ae-364da2661108https://github.com/ethyca/fides/commit/868c4d629760572192bd61db34f5a4458ed12005Patch
af854a3a-2127-422b-91ae-364da2661108https://github.com/ethyca/fides/pull/5026Patch, Issue Tracking
af854a3a-2127-422b-91ae-364da2661108https://github.com/ethyca/fides/security/advisories/GHSA-cvw4-c69g-7v7mPatch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://sansec.io/research/polyfill-supply-chain-attackProduct
Impacted products
Vendor Product Version
ethyca fides *


To clipboard 

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              "criteria": "cpe:2.3:a:ethyca:fides:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "960B2BA6-88EF-4A6D-A506-5F699C28EFA0",
              "versionEndExcluding": "2.39.1",
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Fides is an open-source privacy engineering platform. `fides.js`, a client-side script used to interact with the consent management features of Fides, used the `polyfill.io` domain in a very limited edge case, when it detected a legacy browser such as IE11 that did not support the fetch standard. Therefore it was possible for users of legacy, pre-2017 browsers who navigate to a page serving `fides.js` to download and execute malicious scripts from the `polyfill.io` domain when the domain was compromised and serving malware. No exploitation of `fides.js` via `polyfill.io` has been identified as of time of publication.\n\nThe vulnerability has been patched in Fides version `2.39.1`. Users are advised to upgrade to this version or later to secure their systems against this threat. On Thursday, June 27, 2024, Cloudflare and Namecheap intervened at a domain level to ensure `polyfill.io` and its subdomains could not resolve to the compromised service, rendering this vulnerability unexploitable. Prior to the domain level intervention, there were no server-side workarounds and the confidentiality, integrity, and availability impacts of this vulnerability were high. Clients could ensure they were not affected by using a modern browser that supported the fetch standard."
    },
    {
      "lang": "es",
      "value": "Fides es una plataforma de ingenier\u00eda de privacidad de c\u00f3digo abierto. `fides.js`, un script del lado del cliente utilizado para interactuar con las funciones de gesti\u00f3n de consentimiento de Fides, utiliz\u00f3 el dominio `polyfill.io` en un caso l\u00edmite muy limitado, cuando detect\u00f3 un navegador heredado como IE11 que no admit\u00eda el est\u00e1ndar de recuperaci\u00f3n. Por lo tanto, era posible que los usuarios de navegadores heredados anteriores a 2017 que navegaban a una p\u00e1gina que serv\u00eda `fides.js` descargaran y ejecutaran scripts maliciosos desde el dominio `polyfill.io` cuando el dominio estaba comprometido y serv\u00eda malware. No se ha identificado ninguna explotaci\u00f3n de `fides.js` a trav\u00e9s de `polyfill.io` al momento de la publicaci\u00f3n. La vulnerabilidad ha sido parcheada en la versi\u00f3n `2.39.1` de Fides. Se recomienda a los usuarios que actualicen a esta versi\u00f3n o posterior para proteger sus sistemas contra esta amenaza. El jueves 27 de junio de 2024, Cloudflare y Namecheap intervinieron a nivel de dominio para garantizar que `polyfill.io` y sus subdominios no pudieran resolver el servicio comprometido, haciendo que esta vulnerabilidad no se pudiera explotar. Antes de la intervenci\u00f3n a nivel de dominio, no hab\u00eda workarounds en el lado del servidor y los impactos de esta vulnerabilidad en la confidencialidad, integridad y disponibilidad eran altos. Los clientes pod\u00edan asegurarse de no verse afectados utilizando un navegador moderno que admitiera el est\u00e1ndar de recuperaci\u00f3n."
    }
  ],
  "id": "CVE-2024-38537",
  "lastModified": "2025-09-02T20:27:17.180",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 0.0,
          "baseSeverity": "NONE",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N",
          "version": "3.1"
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        "type": "Secondary"
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          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
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        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  "published": "2024-07-02T20:15:05.860",
  "references": [
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      "tags": [
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      ],
      "url": "https://fetch.spec.whatwg.org"
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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          "value": "CWE-829"
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      "type": "Secondary"
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}


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