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CVE-2021-31362 (GCVE-0-2021-31362)

Vulnerability from cvelistv5 – Published: 2021-10-19 18:16 – Updated: 2024-09-17 00:15
VLAI
Title
Junos OS and Junos OS Evolved: An IS-IS adjacency might be taken down if a bad hello PDU is received for an existing adjacency causing a DoS
Summary
A Protection Mechanism Failure vulnerability in RPD (routing protocol daemon) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent unauthenticated attacker to cause established IS-IS adjacencies to go down by sending a spoofed hello PDU leading to a Denial of Service (DoS) condition. Continued receipted of these spoofed PDUs will create a sustained Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS All versions prior to 18.2R3-S8; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R3-S9; 19.1 versions prior to 19.1R3-S7; 19.2 versions prior to 19.2R1-S7, 19.2R3-S3; 19.3 versions prior to 19.3R2-S6, 19.3R3-S2; 19.4 versions prior to 19.4R3-S3; 20.1 versions prior to 20.1R3; 20.2 versions prior to 20.2R3; 20.3 versions prior to 20.3R3; 20.4 versions prior to 20.4R2. Juniper Networks Junos OS Evolved All versions prior to 20.4R2-EVO; 21.1 versions prior to 21.1R2-EVO.
CWE
  • CWE-693 - Protection Mechanism Failure
  • Denial of Service (DoS)
References
URL Tags
https://kb.juniper.net/JSA11224 x_refsource_CONFIRM
Impacted products
Vendor Product Version CPE status
Juniper Networks Junos OS Affected: unspecified , < 18.2R3-S8 (custom)
Affected: 18.3 , < 18.3R3-S5 (custom)
Affected: 18.4 , < 18.4R3-S9 (custom)
Affected: 19.1 , < 19.1R3-S7 (custom)
Affected: 19.2 , < 19.2R1-S7, 19.2R3-S3 (custom)
Affected: 19.3 , < 19.3R2-S6, 19.3R3-S2 (custom)
Affected: 19.4 , < 19.4R3-S3 (custom)
Affected: 20.1 , < 20.1R3 (custom)
Affected: 20.2 , < 20.2R3 (custom)
Affected: 20.3 , < 20.3R3 (custom)
Affected: 20.4 , < 20.4R2 (custom)
guessed Create a notification for this product.
Juniper Networks Junos OS Evolved Affected: unspecified , < 20.4R2-EVO (custom)
Affected: 21.1 , < 21.1R2-EVO (custom)
guessed Create a notification for this product.
Date Public
2021-10-13 00:00
Show details on NVD website

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                "negate": false,
                "operator": "OR"
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          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "A Protection Mechanism Failure vulnerability in RPD (routing protocol daemon) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent unauthenticated attacker to cause established IS-IS adjacencies to go down by sending a spoofed hello PDU leading to a Denial of Service (DoS) condition. Continued receipted of these spoofed PDUs will create a sustained Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS All versions prior to 18.2R3-S8; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R3-S9; 19.1 versions prior to 19.1R3-S7; 19.2 versions prior to 19.2R1-S7, 19.2R3-S3; 19.3 versions prior to 19.3R2-S6, 19.3R3-S2; 19.4 versions prior to 19.4R3-S3; 20.1 versions prior to 20.1R3; 20.2 versions prior to 20.2R3; 20.3 versions prior to 20.3R3; 20.4 versions prior to 20.4R2. Juniper Networks Junos OS Evolved All versions prior to 20.4R2-EVO; 21.1 versions prior to 21.1R2-EVO."
          },
          {
            "lang": "es",
            "value": "Una vulnerabilidad de fallo de mecanismo de protecci\u00f3n en RPD (demonio de protocolo de enrutamiento) de Juniper Networks Junos OS y Junos OS Evolved permite a un atacante adyacente no autenticado causar una ca\u00edda de adyacencias IS-IS establecidas mediante el env\u00edo de una PDU de saludo falsa que conlleva a una condici\u00f3n de Denegaci\u00f3n de Servicio (DoS). Una recepci\u00f3n continuada de estas PDU falsas crear\u00e1 una condici\u00f3n de Denegaci\u00f3n de Servicio (DoS) sostenida. Este problema afecta a: Juniper Networks Junos OS Todas las versiones anteriores a 18.2R3-S8; versiones 18.3 anteriores a 18.3R3-S5; versiones 18.4 anteriores a 18.4R3-S9; versiones 19.1 anteriores a 19.1R3-S7; versiones 19.2 anteriores a 19.2R1-S7, 19.2R3-S3; 19. 3 versiones anteriores a 19.3R2-S6, 19.3R3-S2; versiones 19.4 anteriores a 19.4R3-S3; versiones 20.1 anteriores a 20.1R3; versiones 20.2 anteriores a 20.2R3; versiones 20.3 anteriores a 20.3R3; versiones 20.4 anteriores a 20.4R2. Juniper Networks Junos OS Evolved Todas las versiones anteriores a 20.4R2-EVO; versiones 21.1 anteriores a 21.1R2-EVO"
          }
        ],
        "id": "CVE-2021-31362",
        "lastModified": "2024-11-21T06:05:30.550",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "LOW",
              "cvssData": {
                "accessComplexity": "LOW",
                "accessVector": "ADJACENT_NETWORK",
                "authentication": "NONE",
                "availabilityImpact": "PARTIAL",
                "baseScore": 3.3,
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "vectorString": "AV:A/AC:L/Au:N/C:N/I:N/A:P",
                "version": "2.0"
              },
              "exploitabilityScore": 6.5,
              "impactScore": 2.9,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
          ],
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "ADJACENT_NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 6.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 2.8,
              "impactScore": 3.6,
              "source": "sirt@juniper.net",
              "type": "Secondary"
            }
          ]
        },
        "published": "2021-10-19T19:15:09.253",
        "references": [
          {
            "source": "sirt@juniper.net",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "https://kb.juniper.net/JSA11224"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "https://kb.juniper.net/JSA11224"
          }
        ],
        "sourceIdentifier": "sirt@juniper.net",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-693"
              }
            ],
            "source": "sirt@juniper.net",
            "type": "Secondary"
          },
          {
            "description": [
              {
                "lang": "en",
                "value": "NVD-CWE-Other"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "current_release_date": "2026-03-27T14:08:29+00:00",
      "cve": "CVE-2021-31362",
      "id": "CVE-2021-31362",
      "initial_release_date": "2021-10-13T00:00:00+00:00",
      "product_status:known_not_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "Junos OS and Junos OS Evolved: An IS-IS adjacency might be taken down if a bad hello PDU is received for an existing adjacency causing a DoS",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-31362.json",
      "version": "3"
    }
  }
}



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