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CVE-2021-0276

Estado: ModificadaCrítica (9.8)—

A stack-based Buffer Overflow vulnerability in Juniper Networks SBR Carrier with EAP (Extensible Authentication Protocol) authentication configured, allows an attacker sending specific packets causing the radius daemon to crash resulting with a Denial of Service (DoS) or leading to remote code execution (RCE). By continuously sending this specific packets, an attacker can repeatedly crash the radius daemon, causing a sustained Denial of Service (DoS). This issue affects Juniper Networks SBR Carrier: 8.4.1 versions prior to 8.4.1R19; 8.5.0 versions prior to 8.5.0R10; 8.6.0 versions prior to 8.6.0R4.

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 (1)

Juniper — Steel-belted Radius Carrier

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-0276",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 6.8,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "sirt@juniper.net",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 9.8,
          "attackVector": "NETWORK",
          "baseSeverity": "CRITICAL",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "sirt@juniper.net",
      "affectedData": [
        {
          "vendor": "Juniper Networks",
          "product": "SBR Carrier",
          "versions": [
            {
              "status": "affected",
              "version": "8.4.1",
              "lessThan": "8.4.1R19",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "8.5.0",
              "lessThan": "8.5.0R10",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "8.6.0",
              "lessThan": "8.6.0R4",
              "versionType": "custom"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-07-15T20:15:09.290",
  "references": [
    {
      "url": "https://kb.juniper.net/JSA11180",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "sirt@juniper.net"
    },
    {
      "url": "https://kb.juniper.net/JSA11180",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "sirt@juniper.net",
      "description": [
        {
          "lang": "en",
          "value": "CWE-121"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "A stack-based Buffer Overflow vulnerability in Juniper Networks SBR Carrier with EAP (Extensible Authentication Protocol) authentication configured, allows an attacker sending specific packets causing the radius daemon to crash resulting with a Denial of Service (DoS) or leading to remote code execution (RCE). By continuously sending this specific packets, an attacker can repeatedly crash the radius daemon, causing a sustained Denial of Service (DoS). This issue affects Juniper Networks SBR Carrier: 8.4.1 versions prior to 8.4.1R19; 8.5.0 versions prior to 8.5.0R10; 8.6.0 versions prior to 8.6.0R4."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de Desbordamiento del Búfer en la región stack de la memoria en Juniper Networks SBR Carrier con la autenticación EAP (Extensible Authentication Protocol) configurada, permite a un atacante enviar paquetes específicos causando el bloqueo del demonio radius, resultando en una Denegación de Servicio (DoS) o conllevando a una ejecución de código remota (RCE). Al enviar continuamente estos paquetes específicos, un atacante puede bloquear repetidamente el daemon radius, causando una Denegación de Servicio (DoS) sostenida. Este problema afecta a Juniper Networks SBR Carrier: versiones 8.4.1 anteriores a 8.4.1R19; versiones 8.5.0 anteriores a 8.5.0R10; versiones 8.6.0 anteriores a 8.6.0R4"
    }
  ],
  "lastModified": "2026-06-17T03:29:41.080",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:juniper:steel-belted_radius_carrier:8.4.1:-:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "8BE22F9D-096C-4826-837D-81AC0DE6243E"
            },
            {
              "criteria": "cpe:2.3:a:juniper:steel-belted_radius_carrier:8.4.1:r13:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "167FBC0D-C9C4-4F38-A0E5-55C9E0E9027F"
            },
            {
              "criteria": "cpe:2.3:a:juniper:steel-belted_radius_carrier:8.5.0:-:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "433CE00E-8213-424D-8B71-F4306134C857"
            },
            {
              "criteria": "cpe:2.3:a:juniper:steel-belted_radius_carrier:8.5.0:r4:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "0EAAB90E-A473-4EFD-A9A6-05807873712C"
            },
            {
              "criteria": "cpe:2.3:a:juniper:steel-belted_radius_carrier:8.6.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "2C96D4A3-BAD8-42BE-A1AE-F3719BD8A7F5"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "sirt@juniper.net"
}