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CVE-2021-20236

Estado: ModificadaCrítica (9.8)—

A flaw was found in the ZeroMQ server in versions before 4.3.3. This flaw allows a malicious client to cause a stack buffer overflow on the server by sending crafted topic subscription requests and then unsubscribing. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

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 (4)

Fedoraproject — FedoraRedhat — Ceph StorageRedhat — Enterprise LinuxZeromq — Zeromq

CWE

Referencias

JSON original (NVD)

Mostrar
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          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
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  "published": "2021-05-28T11:15:07.933",
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      "value": "A flaw was found in the ZeroMQ server in versions before 4.3.3. This flaw allows a malicious client to cause a stack buffer overflow on the server by sending crafted topic subscription requests and then unsubscribing. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability."
    },
    {
      "lang": "es",
      "value": "Se encontró un fallo en el servidor ZeroMQ en versiones anteriores a 4.3.3. Este fallo permite a un cliente malicioso causar un desbordamiento del búfer de pila en el servidor mediante el envío de peticiones de suscripción de temas diseñadas y luego cancelando la suscripción. La mayor amenaza de esta vulnerabilidad es la confidencialidad, la integridad y la disponibilidad del sistema"
    }
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  "lastModified": "2026-06-17T03:33:31.473",
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