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CVE-2021-27290

Estado: ModificadaAlta (7.5)—

ssri 5.2.2-8.0.0, fixed in 8.0.1, processes SRIs using a regular expression which is vulnerable to a denial of service. Malicious SRIs could take an extremely long time to process, leading to denial of service. This issue only affects consumers using the strict option.

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 (3)

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2021-27290",
  "cveTags": [],
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        "type": "Primary",
        "source": "nvd@nist.gov",
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          "version": "2.0",
          "baseScore": 4.3,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
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        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
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          "version": "3.1",
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          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
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        "impactScore": 3.6,
        "exploitabilityScore": 3.9
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  "affected": [
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      "affectedData": [
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          "product": "n/a",
          "versions": [
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  "published": "2021-03-12T22:15:14.843",
  "references": [
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      "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdf",
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      "url": "https://doyensec.com/resources/Doyensec_Advisory_ssri_redos.pdf",
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      "url": "https://github.com/yetingli/SaveResults/blob/main/pdf/ssri-redos.pdf",
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "source": "nvd@nist.gov",
      "description": [
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          "lang": "en",
          "value": "NVD-CWE-Other"
        }
      ]
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "ssri 5.2.2-8.0.0, fixed in 8.0.1, processes SRIs using a regular expression which is vulnerable to a denial of service. Malicious SRIs could take an extremely long time to process, leading to denial of service. This issue only affects consumers using the strict option."
    },
    {
      "lang": "es",
      "value": "ssri versión 5.2.2-8.0.0, corregido en versión 8.0.1, procesa los SRI usando una expresión regular que es vulnerable a una denegación de servicio. Los SRI maliciosos pueden tardar mucho en procesarse, conllevando a una denegación del servicio. Este problema solo afecta a  consumidores que usan la opción estricta"
    }
  ],
  "lastModified": "2026-06-17T03:44:37.160",
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