cvelist/2021/31xxx/CVE-2021-31379.json

{
    "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": ">=",
                                            "version_name": "17.2",
                                            "version_value": "17.2R1"
                                        },
                                        {
                                            "platform": "MX Series",
                                            "version_affected": "<",
                                            "version_name": "17.3",
                                            "version_value": "17.3R3-S9"
                                        },
                                        {
                                            "platform": "MX Series",
                                            "version_affected": "<",
                                            "version_name": "17.4",
                                            "version_value": "17.4R2-S12, 17.4R3-S3"
                                        },
                                        {
                                            "platform": "MX Series",
                                            "version_affected": "<",
                                            "version_name": "18.1",
                                            "version_value": "18.1R3-S11"
                                        },
                                        {
                                            "platform": "MX Series",
                                            "version_affected": "<",
                                            "version_name": "18.2",
                                            "version_value": "18.2R2-S6, 18.2R3-S3"
                                        },
                                        {
                                            "platform": "MX Series",
                                            "version_affected": "<",
                                            "version_name": "18.3",
                                            "version_value": "18.3R2-S4, 18.3R3-S1"
                                        },
                                        {
                                            "platform": "MX Series",
                                            "version_affected": "<",
                                            "version_name": "18.4",
                                            "version_value": "18.4R1-S8, 18.4R2-S5, 18.4R3"
                                        },
                                        {
                                            "platform": "MX Series",
                                            "version_affected": "<",
                                            "version_name": "19.1",
                                            "version_value": "19.1R1-S6, 19.1R2-S2, 19.1R3"
                                        },
                                        {
                                            "platform": "MX Series",
                                            "version_affected": "<",
                                            "version_name": "19.2",
                                            "version_value": "19.2R1-S5, 19.2R2"
                                        },
                                        {
                                            "platform": "MX Series",
                                            "version_affected": "<",
                                            "version_name": "19.3",
                                            "version_value": "19.3R2-S5, 19.3R3"
                                        },
                                        {
                                            "platform": "MX Series",
                                            "version_affected": "!<",
                                            "version_value": "17.2R1"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "Juniper Networks"
                }
            ]
        }
    },
    "configuration": [
        {
            "lang": "eng",
            "value": "The following minimal configuration is necessary: \n\n  [chassis fpc <fpc-number> pic <pic-number> inline-services bandwidth <bandwidth>]\n  [interfaces <si-interface-name> unit <inside-logical-unit> family inet]\n  [interfaces <si-interface-name> unit <inside-logical-unit> family inet6]\n  [interfaces <si-interface-name> unit <inside-logical-unit> service-domain inside]\n  [interfaces <si-interface-name> unit <outside-logical-unit> family inet]\n  [interfaces <si-interface-name> unit <outside-logical-unit> family inet6]\n  [interfaces <si-interface-name> unit <outside-logical-unit> service-domain outside]\n  [services softwire softwire-concentrator map-e <mape-instance-name> version03]\n  [services softwire softwire-concentrator map-e <mape-instance-name> softwire-address <IPv6-Address>]\n  [services softwire softwire-concentrator map-e <mape-instance-name> ipv4-prefix <IPv4-Prefix> mape-prefix <IPv6-Prefix>]\n  [services softwire softwire-concentrator map-e <mape-instance-name> ea-bits-len <0..48>]\n  [services softwire softwire-concentrator map-e <mape-instance-name> psid-off[set <0..16>]\n  [services softwire softwire-concentrator map-e <mape-instance-name> psid-length <0..16>]\n  [services softwire softwire-concentrator map-e <mape-instance-name> mtu-ipv6 <1280..9192>]\n  [services softwire softwire-concentrator map-e <mape-instance-name> v4-reassembly]\n  [services softwire rule <mape-rule-name> match-direction input term <term-name> then map-e <mape-instance-name>]\n  [services service-set <service-set-name> softwire-rules <mape-rule-name>]\n  [services service-set <service-set-name> next-hop-service inside-service-interface <si-interface-name.inside-logical-unit> outside-service-interface <si-interface-name.outside-logical-unit>]\n"
        }
    ],
    "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> 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": [
        {
            "lang": "eng",
            "value": "Juniper SIRT is not aware of any malicious exploitation of this vulnerability."
        }
    ],
    "generator": {
        "engine": "Vulnogram 0.0.9"
    },
    "impact": {
        "cvss": {
            "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"
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-696 Incorrect Behavior Order"
                    }
                ]
            },
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "Denial of Service (DoS)"
                    }
                ]
            }
        ]
    },
    "references": {
        "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": "eng",
            "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.\n"
        }
    ],
    "source": {
        "advisory": "JSA11247",
        "defect": [
            "1468454"
        ],
        "discovery": "INTERNAL"
    },
    "work_around": [
        {
            "lang": "eng",
            "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;      <<<<<  DISABLE the v4-reassembly option.\n      v6-reassembly;      <<<<<  DISABLE the v6-reassembly option.\n  }\n"
        }
    ]
}