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CVE-2020-15049

Estado: ModificadaAlta (8.8)—

An issue was discovered in http/ContentLengthInterpreter.cc in Squid before 4.12 and 5.x before 5.0.3. A Request Smuggling and Poisoning attack can succeed against the HTTP cache. The client sends an HTTP request with a Content-Length header containing "+\ "-" or an uncommon shell whitespace character prefix to the length field-value.

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 (2)

Fedoraproject — FedoraSquid-cache — Squid

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2020-15049",
  "cveTags": [],
  "metrics": {
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        "source": "nvd@nist.gov",
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        "impactScore": 6.4,
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        "obtainAllPrivilege": false,
        "exploitabilityScore": 8,
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        "userInteractionRequired": false
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  "published": "2020-06-30T18:15:12.367",
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  "weaknesses": [
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      "description": [
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          "value": "CWE-444"
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  "descriptions": [
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      "lang": "en",
      "value": "An issue was discovered in http/ContentLengthInterpreter.cc in Squid before 4.12 and 5.x before 5.0.3. A Request Smuggling and Poisoning attack can succeed against the HTTP cache. The client sends an HTTP request with a Content-Length header containing \"+\\ \"-\" or an uncommon shell whitespace character prefix to the length field-value."
    },
    {
      "lang": "es",
      "value": "Se detectó un problema en el archivo http/ContentLengthInterpreter.cc en Squid versiones anteriores a 4.12 y versiones 5.x anteriores a 5.0.3. Un ataque de Trafico No Autorizado de Peticiones y Envenenamiento puede tener éxito contra la memoria caché HTTP. El cliente envía una petición HTTP con un encabezado Content-Length que contiene \"+\\\"-\" o un prefijo del carácter espacio en blanco de shell poco común en el valor de campo de longitud"
    }
  ],
  "lastModified": "2026-06-17T02:55:57.853",
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