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CVE-2021-0225

Estado: ModificadaMedia (5.8)—

An Improper Check for Unusual or Exceptional Conditions in Juniper Networks Junos OS Evolved may cause the stateless firewall filter configuration which uses the action 'policer' in certain combinations with other options to not take effect. An administrator can use the following CLI command to see the failures with filter configuration: user@device> show log kfirewall-agent.log | match ERROR Jul 23 14:16:03 ERROR: filter not supported This issue affects Juniper Networks Junos OS Evolved: Versions 19.1R1-EVO and above prior to 20.3R1-S2-EVO, 20.3R2-EVO. This issue does not affect Juniper Networks Junos OS.

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 — Junos OS Evolved

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-0225",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "sirt@juniper.net",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 5.8,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 3.9
      },
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 5.8,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "sirt@juniper.net",
      "affectedData": [
        {
          "vendor": "Juniper Networks",
          "product": "Junos OS Evolved",
          "versions": [
            {
              "status": "affected",
              "version": "19.1R1-EVO",
              "lessThan": "unspecified",
              "versionType": "custom"
            },
            {
              "status": "affected",
              "version": "20.3-EVO",
              "lessThan": "20.3R1-S2-EVO, 20.3R2-EVO",
              "versionType": "custom"
            }
          ]
        }
      ]
    }
  ],
  "published": "2021-04-22T20:15:08.463",
  "references": [
    {
      "url": "https://kb.juniper.net/JSA11120",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "sirt@juniper.net"
    },
    {
      "url": "https://kb.juniper.net/JSA11120",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "sirt@juniper.net",
      "description": [
        {
          "lang": "en",
          "value": "CWE-754"
        }
      ]
    },
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-754"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "An Improper Check for Unusual or Exceptional Conditions in Juniper Networks Junos OS Evolved may cause the stateless firewall filter configuration which uses the action 'policer' in certain combinations with other options to not take effect. An administrator can use the following CLI command to see the failures with filter configuration: user@device> show log kfirewall-agent.log | match ERROR Jul 23 14:16:03 ERROR: filter not supported This issue affects Juniper Networks Junos OS Evolved: Versions 19.1R1-EVO and above prior to 20.3R1-S2-EVO, 20.3R2-EVO. This issue does not affect Juniper Networks Junos OS."
    },
    {
      "lang": "es",
      "value": "Una Comprobación Inapropiada de Condiciones Inusuales o Excepcionales en Juniper Networks Junos OS Evolved, puede causar que la configuración del filtro de firewall sin estado que usa la acción \"policer\" en determinadas combinaciones con otras opciones no surta efecto. Un administrador puede usar el siguiente comando CLI para visualizar los fallos con la configuración del filtro: user@device) show log kfirewall-agent.log | match ERROR Jul 23 14:16:03 ERROR: filter not supported. Este problema afecta a Juniper Networks Junos OS Evolved: Versiones 19.1R1-EVO y por encima, versiones anteriores a 20.3R1-S2-EVO, 20.3R2-EVO. Este problema no afecta al Juniper Networks Junos OS"
    }
  ],
  "lastModified": "2026-06-17T03:29:32.193",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:juniper:junos_os_evolved:19.1:r1:*:*:*:*:*:*",
              "vulnerable": true,
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            },
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              "vulnerable": true,
              "matchCriteriaId": "01A9BD92-5865-455D-9585-098DCFCC24DD"
            },
            {
              "criteria": "cpe:2.3:o:juniper:junos_os_evolved:19.2:r1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "914D6984-1820-483B-AEB9-2C5257B5E900"
            },
            {
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              "vulnerable": true,
              "matchCriteriaId": "14C57D33-01BB-4190-B787-F5BDACE82AFD"
            },
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              "matchCriteriaId": "6480A5C9-3280-40C5-BC08-509555F28363"
            },
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              "vulnerable": true,
              "matchCriteriaId": "2D3C2D74-AF22-4BED-A0C5-089B5507D275"
            },
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              "matchCriteriaId": "F64FBB4B-7CBF-499B-A523-804857DEFAFA"
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              "matchCriteriaId": "EEBE159F-5D94-4C18-B922-331586BEA2CA"
            },
            {
              "criteria": "cpe:2.3:o:juniper:junos_os_evolved:20.2:r1:*:*:*:*:*:*",
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              "matchCriteriaId": "FCA8D4D2-D49D-4F91-95E2-2A0E8599338A"
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              "vulnerable": true,
              "matchCriteriaId": "0A9CA997-2DDA-4808-B2AE-8804FEB798B2"
            }
          ],
          "operator": "OR"
        }
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    }
  ],
  "sourceIdentifier": "sirt@juniper.net"
}