{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T22:55:53.818Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://kb.juniper.net/JSA11247"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.juniper.net/documentation/en_US/junos/topics/topic-map/map-e-configuring.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "platforms": [
            "MX Series"
          ],
          "product": "Junos OS",
          "vendor": "Juniper Networks",
          "versions": [
            {
              "lessThan": "17.2R1",
              "status": "unaffected",
              "version": "unspecified",
              "versionType": "custom"
            },
            {
              "lessThan": "17.2*",
              "status": "affected",
              "version": "17.2R1",
              "versionType": "custom"
            },
            {
              "lessThan": "17.3R3-S9",
              "status": "affected",
              "version": "17.3",
              "versionType": "custom"
            },
            {
              "lessThan": "17.4R2-S12, 17.4R3-S3",
              "status": "affected",
              "version": "17.4",
              "versionType": "custom"
            },
            {
              "lessThan": "18.1R3-S11",
              "status": "affected",
              "version": "18.1",
              "versionType": "custom"
            },
            {
              "lessThan": "18.2R2-S6, 18.2R3-S3",
              "status": "affected",
              "version": "18.2",
              "versionType": "custom"
            },
            {
              "lessThan": "18.3R2-S4, 18.3R3-S1",
              "status": "affected",
              "version": "18.3",
              "versionType": "custom"
            },
            {
              "lessThan": "18.4R1-S8, 18.4R2-S5, 18.4R3",
              "status": "affected",
              "version": "18.4",
              "versionType": "custom"
            },
            {
              "lessThan": "19.1R1-S6, 19.1R2-S2, 19.1R3",
              "status": "affected",
              "version": "19.1",
              "versionType": "custom"
            },
            {
              "lessThan": "19.2R1-S5, 19.2R2",
              "status": "affected",
              "version": "19.2",
              "versionType": "custom"
            },
            {
              "lessThan": "19.3R2-S5, 19.3R3",
              "status": "affected",
              "version": "19.3",
              "versionType": "custom"
            }
          ]
        }
      ],
      "configurations": [
        {
          "lang": "en",
          "value": "The following minimal configuration is necessary: \n\n  [chassis fpc \u003cfpc-number\u003e pic \u003cpic-number\u003e inline-services bandwidth \u003cbandwidth\u003e]\n  [interfaces \u003csi-interface-name\u003e unit \u003cinside-logical-unit\u003e family inet]\n  [interfaces \u003csi-interface-name\u003e unit \u003cinside-logical-unit\u003e family inet6]\n  [interfaces \u003csi-interface-name\u003e unit \u003cinside-logical-unit\u003e service-domain inside]\n  [interfaces \u003csi-interface-name\u003e unit \u003coutside-logical-unit\u003e family inet]\n  [interfaces \u003csi-interface-name\u003e unit \u003coutside-logical-unit\u003e family inet6]\n  [interfaces \u003csi-interface-name\u003e unit \u003coutside-logical-unit\u003e service-domain outside]\n  [services softwire softwire-concentrator map-e \u003cmape-instance-name\u003e version03]\n  [services softwire softwire-concentrator map-e \u003cmape-instance-name\u003e softwire-address \u003cIPv6-Address\u003e]\n  [services softwire softwire-concentrator map-e \u003cmape-instance-name\u003e ipv4-prefix \u003cIPv4-Prefix\u003e mape-prefix \u003cIPv6-Prefix\u003e]\n  [services softwire softwire-concentrator map-e \u003cmape-instance-name\u003e ea-bits-len \u003c0..48\u003e]\n  [services softwire softwire-concentrator map-e \u003cmape-instance-name\u003e psid-off[set \u003c0..16\u003e]\n  [services softwire softwire-concentrator map-e \u003cmape-instance-name\u003e psid-length \u003c0..16\u003e]\n  [services softwire softwire-concentrator map-e \u003cmape-instance-name\u003e mtu-ipv6 \u003c1280..9192\u003e]\n  [services softwire softwire-concentrator map-e \u003cmape-instance-name\u003e v4-reassembly]\n  [services softwire rule \u003cmape-rule-name\u003e match-direction input term \u003cterm-name\u003e then map-e \u003cmape-instance-name\u003e]\n  [services service-set \u003cservice-set-name\u003e softwire-rules \u003cmape-rule-name\u003e]\n  [services service-set \u003cservice-set-name\u003e next-hop-service inside-service-interface \u003csi-interface-name.inside-logical-unit\u003e outside-service-interface \u003csi-interface-name.outside-logical-unit\u003e]"
        }
      ],
      "datePublic": "2021-10-13T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "An Incorrect Behavior Order vulnerability in the MAP-E automatic tunneling mechanism of Juniper Networks Junos OS allows an attacker to send certain malformed IPv4 or IPv6 packets to cause a Denial of Service (DoS) to the PFE on the device which is disabled as a result of the processing of these packets. Continued receipt and processing of these malformed IPv4 or IPv6 packets will create a sustained Denial of Service (DoS) condition. This issue only affects MPC 7/8/9/10/11 cards, when MAP-E IP reassembly is enabled on these cards. An indicator of compromise is the output: FPC [\"FPC ID\" # e.g. \"0\"] PFE #{PFE ID # e.g. \"1\"] : Fabric Disabled Example: FPC 0 PFE #1 : Fabric Disabled when using the command: show chassis fabric fpcs An example of a healthy result of the command use would be: user@device-re1\u003e show chassis fabric fpcs Fabric management FPC state: FPC 0 PFE #0 Plane 0: Plane enabled Plane 1: Plane enabled Plane 2: Plane enabled Plane 3: Plane enabled Plane 4: Plane enabled Plane 5: Plane enabled Plane 6: Plane enabled Plane 7: Plane enabled This issue affects: Juniper Networks Junos OS on MX Series with MPC 7/8/9/10/11 cards, when MAP-E IP reassembly is enabled on these cards. 17.2 version 17.2R1 and later versions; 17.3 versions prior to 17.3R3-S9; 17.4 versions prior to 17.4R2-S12, 17.4R3-S3; 18.1 versions prior to 18.1R3-S11; 18.2 versions prior to 18.2R2-S6, 18.2R3-S3; 18.3 versions prior to 18.3R2-S4, 18.3R3-S1; 18.4 versions prior to 18.4R1-S8, 18.4R2-S5, 18.4R3; 19.1 versions prior to 19.1R1-S6, 19.1R2-S2, 19.1R3; 19.2 versions prior to 19.2R1-S5, 19.2R2; 19.3 versions prior to 19.3R2-S5, 19.3R3. This issue does not affect Juniper Networks Junos OS versions prior to 17.2R1."
        }
      ],
      "exploits": [
        {
          "lang": "en",
          "value": "Juniper SIRT is not aware of any malicious exploitation of this vulnerability."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
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      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-696",
              "description": "CWE-696 Incorrect Behavior Order",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "description": "Denial of Service (DoS)",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-10-19T18:17:19.000Z",
        "orgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968",
        "shortName": "juniper"
      },
      "references": [
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://kb.juniper.net/JSA11247"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://www.juniper.net/documentation/en_US/junos/topics/topic-map/map-e-configuring.html"
        }
      ],
      "solutions": [
        {
          "lang": "en",
          "value": "The following software releases have been updated to resolve this specific issue: 17.3R3-S9, 17.4R2-S12, 17.4R3-S3, 18.1R3-S11, 18.2R2-S6, 18.2R3-S3, 18.3R2-S4, 18.3R3-S1, 18.4R1-S8, 18.4R2-S5, 18.4R3, 19.1R1-S6, 19.1R2-S2, 19.1R3, 19.2R1-S5, 19.2R2, 19.3R2-S5, 19.3R3, 19.4R1, and all subsequent releases."
        }
      ],
      "source": {
        "advisory": "JSA11247",
        "defect": [
          "1468454"
        ],
        "discovery": "INTERNAL"
      },
      "title": "Junos OS: MX Series: MPC 7/8/9/10/11 cards with MAP-E: PFE halts when an attacker sends malformed IPv4 or IPv6 traffic inside the MAP-E tunnel.",
      "workarounds": [
        {
          "lang": "en",
          "value": "To work around this issue customers can either:\n\n1. Disable Mapping of Address and port - Encapsulation (MAP-E) as an inline service on MX Series routers that use MPC and MIC interfaces.\n\nor\n\n2. Determine where the MAP-E v4 or v6 reassembly exists, review the following hierarchies and disable the \"v4-reassembly;\" and \"v6-reassembly;\" options where they exist:\n\n  [services softwire softwire-concentrator]\n  [services softwires softwire-types]\n  [security softwires]\n\nand the following syntaxes: \n\n  map-e name {\n      v4-reassembly;      \u003c\u003c\u003c\u003c\u003c  DISABLE the v4-reassembly option.\n      v6-reassembly;      \u003c\u003c\u003c\u003c\u003c  DISABLE the v6-reassembly option.\n  }"
        }
      ],
      "x_generator": {
        "engine": "Vulnogram 0.0.9"
      },
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "sirt@juniper.net",
          "DATE_PUBLIC": "2021-10-13T16:00:00.000Z",
          "ID": "CVE-2021-31379",
          "STATE": "PUBLIC",
          "TITLE": "Junos OS: MX Series: MPC 7/8/9/10/11 cards with MAP-E: PFE halts when an attacker sends malformed IPv4 or IPv6 traffic inside the MAP-E tunnel."
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "Junos OS",
                      "version": {
                        "version_data": [
                          {
                            "platform": "MX Series",
                            "version_affected": "\u003e=",
                            "version_name": "17.2",
                            "version_value": "17.2R1"
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                          {
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                          {
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                            "version_name": "17.4",
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                          {
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                            "version_name": "18.2",
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                            "version_name": "18.3",
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                            "version_affected": "\u003c",
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                          {
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                          {
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                          {
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                            "version_affected": "!\u003c",
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                    }
                  ]
                },
                "vendor_name": "Juniper Networks"
              }
            ]
          }
        },
        "configuration": [
          {
            "lang": "en",
            "value": "The following minimal configuration is necessary: \n\n  [chassis fpc \u003cfpc-number\u003e pic \u003cpic-number\u003e inline-services bandwidth \u003cbandwidth\u003e]\n  [interfaces \u003csi-interface-name\u003e unit \u003cinside-logical-unit\u003e family inet]\n  [interfaces \u003csi-interface-name\u003e unit \u003cinside-logical-unit\u003e family inet6]\n  [interfaces \u003csi-interface-name\u003e unit \u003cinside-logical-unit\u003e service-domain inside]\n  [interfaces \u003csi-interface-name\u003e unit \u003coutside-logical-unit\u003e family inet]\n  [interfaces \u003csi-interface-name\u003e unit \u003coutside-logical-unit\u003e family inet6]\n  [interfaces \u003csi-interface-name\u003e unit \u003coutside-logical-unit\u003e service-domain outside]\n  [services softwire softwire-concentrator map-e \u003cmape-instance-name\u003e version03]\n  [services softwire softwire-concentrator map-e \u003cmape-instance-name\u003e softwire-address \u003cIPv6-Address\u003e]\n  [services softwire softwire-concentrator map-e \u003cmape-instance-name\u003e ipv4-prefix \u003cIPv4-Prefix\u003e mape-prefix \u003cIPv6-Prefix\u003e]\n  [services softwire softwire-concentrator map-e \u003cmape-instance-name\u003e ea-bits-len \u003c0..48\u003e]\n  [services softwire softwire-concentrator map-e \u003cmape-instance-name\u003e psid-off[set \u003c0..16\u003e]\n  [services softwire softwire-concentrator map-e \u003cmape-instance-name\u003e psid-length \u003c0..16\u003e]\n  [services softwire softwire-concentrator map-e \u003cmape-instance-name\u003e mtu-ipv6 \u003c1280..9192\u003e]\n  [services softwire softwire-concentrator map-e \u003cmape-instance-name\u003e v4-reassembly]\n  [services softwire rule \u003cmape-rule-name\u003e match-direction input term \u003cterm-name\u003e then map-e \u003cmape-instance-name\u003e]\n  [services service-set \u003cservice-set-name\u003e softwire-rules \u003cmape-rule-name\u003e]\n  [services service-set \u003cservice-set-name\u003e next-hop-service inside-service-interface \u003csi-interface-name.inside-logical-unit\u003e outside-service-interface \u003csi-interface-name.outside-logical-unit\u003e]"
          }
        ],
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "An Incorrect Behavior Order vulnerability in the MAP-E automatic tunneling mechanism of Juniper Networks Junos OS allows an attacker to send certain malformed IPv4 or IPv6 packets to cause a Denial of Service (DoS) to the PFE on the device which is disabled as a result of the processing of these packets. Continued receipt and processing of these malformed IPv4 or IPv6 packets will create a sustained Denial of Service (DoS) condition. This issue only affects MPC 7/8/9/10/11 cards, when MAP-E IP reassembly is enabled on these cards. An indicator of compromise is the output: FPC [\"FPC ID\" # e.g. \"0\"] PFE #{PFE ID # e.g. \"1\"] : Fabric Disabled Example: FPC 0 PFE #1 : Fabric Disabled when using the command: show chassis fabric fpcs An example of a healthy result of the command use would be: user@device-re1\u003e show chassis fabric fpcs Fabric management FPC state: FPC 0 PFE #0 Plane 0: Plane enabled Plane 1: Plane enabled Plane 2: Plane enabled Plane 3: Plane enabled Plane 4: Plane enabled Plane 5: Plane enabled Plane 6: Plane enabled Plane 7: Plane enabled This issue affects: Juniper Networks Junos OS on MX Series with MPC 7/8/9/10/11 cards, when MAP-E IP reassembly is enabled on these cards. 17.2 version 17.2R1 and later versions; 17.3 versions prior to 17.3R3-S9; 17.4 versions prior to 17.4R2-S12, 17.4R3-S3; 18.1 versions prior to 18.1R3-S11; 18.2 versions prior to 18.2R2-S6, 18.2R3-S3; 18.3 versions prior to 18.3R2-S4, 18.3R3-S1; 18.4 versions prior to 18.4R1-S8, 18.4R2-S5, 18.4R3; 19.1 versions prior to 19.1R1-S6, 19.1R2-S2, 19.1R3; 19.2 versions prior to 19.2R1-S5, 19.2R2; 19.3 versions prior to 19.3R2-S5, 19.3R3. This issue does not affect Juniper Networks Junos OS versions prior to 17.2R1."
            }
          ]
        },
        "exploit": [
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            "lang": "en",
            "value": "Juniper SIRT is not aware of any malicious exploitation of this vulnerability."
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            "attackVector": "NETWORK",
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            "baseScore": 7.5,
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            "integrityImpact": "NONE",
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            "userInteraction": "NONE",
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                  "lang": "eng",
                  "value": "CWE-696 Incorrect Behavior Order"
                }
              ]
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                {
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                  "value": "Denial of Service (DoS)"
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          "reference_data": [
            {
              "name": "https://kb.juniper.net/JSA11247",
              "refsource": "CONFIRM",
              "url": "https://kb.juniper.net/JSA11247"
            },
            {
              "name": "https://www.juniper.net/documentation/en_US/junos/topics/topic-map/map-e-configuring.html",
              "refsource": "MISC",
              "url": "https://www.juniper.net/documentation/en_US/junos/topics/topic-map/map-e-configuring.html"
            }
          ]
        },
        "solution": [
          {
            "lang": "en",
            "value": "The following software releases have been updated to resolve this specific issue: 17.3R3-S9, 17.4R2-S12, 17.4R3-S3, 18.1R3-S11, 18.2R2-S6, 18.2R3-S3, 18.3R2-S4, 18.3R3-S1, 18.4R1-S8, 18.4R2-S5, 18.4R3, 19.1R1-S6, 19.1R2-S2, 19.1R3, 19.2R1-S5, 19.2R2, 19.3R2-S5, 19.3R3, 19.4R1, and all subsequent releases."
          }
        ],
        "source": {
          "advisory": "JSA11247",
          "defect": [
            "1468454"
          ],
          "discovery": "INTERNAL"
        },
        "work_around": [
          {
            "lang": "en",
            "value": "To work around this issue customers can either:\n\n1. Disable Mapping of Address and port - Encapsulation (MAP-E) as an inline service on MX Series routers that use MPC and MIC interfaces.\n\nor\n\n2. Determine where the MAP-E v4 or v6 reassembly exists, review the following hierarchies and disable the \"v4-reassembly;\" and \"v6-reassembly;\" options where they exist:\n\n  [services softwire softwire-concentrator]\n  [services softwires softwire-types]\n  [security softwires]\n\nand the following syntaxes: \n\n  map-e name {\n      v4-reassembly;      \u003c\u003c\u003c\u003c\u003c  DISABLE the v4-reassembly option.\n      v6-reassembly;      \u003c\u003c\u003c\u003c\u003c  DISABLE the v6-reassembly option.\n  }"
          }
        ]
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968",
    "assignerShortName": "juniper",
    "cveId": "CVE-2021-31379",
    "datePublished": "2021-10-19T18:17:19.849Z",
    "dateReserved": "2021-04-15T00:00:00.000Z",
    "dateUpdated": "2024-09-16T22:56:51.495Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}