{
    "CVE_data_meta": {
        "ASSIGNER": "sirt@juniper.net",
        "DATE_PUBLIC": "2022-04-13T07:00:00.000Z",
        "ID": "CVE-2022-22194",
        "STATE": "PUBLIC",
        "TITLE": "Junos OS Evolved: PTX series: An attacker sending a crafted GRE packet will cause the PFE to restart"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "Junos OS Evolved",
                                "version": {
                                    "version_data": [
                                        {
                                            "platform": "PTX10003, PTX10004, PTX10008",
                                            "version_affected": "<",
                                            "version_value": "20.4R2-S3-EVO, 20.4R3-EVO"
                                        },
                                        {
                                            "version_affected": "!>",
                                            "version_name": "21.1",
                                            "version_value": "21.1R1-EVO"
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "Junos OS",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "!",
                                            "version_value": "any"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "Juniper Networks"
                }
            ]
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "An Improper Check for Unusual or Exceptional Conditions vulnerability in the packetIO daemon of Juniper Networks Junos OS Evolved on PTX10003, PTX10004, and PTX10008 allows an unauthenticated, network-based attacker to cause a Denial of Service (DoS). Continued receipt of these crafted packets will cause a sustained Denial of Service condition. This issue affects Juniper Networks Junos OS Evolved all versions prior to 20.4R2-S3-EVO on PTX10003, PTX10004, and PTX10008. This issue does not affect: Juniper Networks Junos OS Evolved versions 21.1R1-EVO and above; Juniper Networks Junos OS."
            }
        ]
    },
    "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-754 Improper Check for Unusual or Exceptional Conditions"
                    }
                ]
            },
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "Denial of Service (DoS)"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "https://kb.juniper.net/JSA69505",
                "refsource": "CONFIRM",
                "url": "https://kb.juniper.net/JSA69505"
            }
        ]
    },
    "solution": [
        {
            "lang": "eng",
            "value": "The following software releases have been updated to resolve this specific issue: 20.4R2-S3-EVO, 20.4R3-EVO.\n"
        }
    ],
    "source": {
        "advisory": "JSA69505",
        "defect": [
            "1614171"
        ],
        "discovery": "USER"
    },
    "work_around": [
        {
            "lang": "eng",
            "value": "One characteristic of this vulnerability is that an FPC restart will only be triggered by a crafted GRE packet which has its' TTL set to 0 or 1 so as a workaround a filter can be implemented that drops such packets:\n\n  set firewall family inet filter GREfilter term 1 from protocol gre\n  set firewall family inet filter GREfilter term 1 from ttl 0\n  set firewall family inet filter GREfilter term 1 then count gre-ttl-0\n  set firewall family inet filter GREfilter term 1 then discard\n  set firewall family inet filter GREfilter term 2 from protocol gre\n  set firewall family inet filter GREfilter term 2 from ttl 1\n  set firewall family inet filter GREfilter term 2 then count gre-ttl-1\n  set firewall family inet filter GREfilter term 2 then discard\n  set firewall family inet filter GREfilter term default then accept\n\nAn equivalent filter for family inet6 is required if IPv6 is configured on at least one interface."
        }
    ]
}