cvelist/2021/0xxx/CVE-2021-0224.json

{
    "CVE_data_meta": {
        "ASSIGNER": "sirt@juniper.net",
        "DATE_PUBLIC": "2021-04-14T16:00:00.000Z",
        "ID": "CVE-2021-0224",
        "STATE": "PUBLIC",
        "TITLE": "Junos OS: ANCPD core when hitting maximum-discovery-table-entries limit"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "Junos OS",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "<",
                                            "version_name": "All",
                                            "version_value": "17.3R3-S12"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "17.4",
                                            "version_value": "17.4R2-S13"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "18.1",
                                            "version_value": "18.1R3-S13"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "18.2",
                                            "version_value": "18.2R3-S8"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "18.3",
                                            "version_value": "18.3R3-S5"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "18.4",
                                            "version_value": "18.4R1-S8, 18.4R3-S8"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "19.1",
                                            "version_value": "19.1R3-S4"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "19.2",
                                            "version_value": "19.2R3-S2"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "19.3",
                                            "version_value": "19.3R3-S1"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "19.4",
                                            "version_value": "19.4R3-S1"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "20.1",
                                            "version_value": "20.1R2"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "20.2",
                                            "version_value": "20.2R2"
                                        },
                                        {
                                            "version_affected": "<",
                                            "version_name": "20.3",
                                            "version_value": "20.3R2"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "Juniper Networks"
                }
            ]
        }
    },
    "configuration": [
        {
            "lang": "eng",
            "value": "Configurations that may be vulnerable to this issue are those where a maximum number of discovery table entries are configured.  For example:\n  [protocols ancp maximum-discovery-table-entries]\n"
        }
    ],
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "A vulnerability in the handling of internal resources necessary to bring up a large number of Layer 2 broadband remote access subscriber (BRAS) nodes in Juniper Networks Junos OS can cause the Access Node Control Protocol daemon (ANCPD) to crash and restart, leading to a Denial of Service (DoS) condition. Continued processing of spoofed subscriber nodes will create a sustained Denial of Service (DoS) condition. When the number of subscribers attempting to connect exceeds the configured maximum-discovery-table-entries value, the subscriber fails to map to an internal neighbor entry, causing the ANCPD process to crash. This issue affects Juniper Networks Junos OS: All versions prior to 17.3R3-S12; 17.4 versions prior to 17.4R2-S13; 18.1 versions prior to 18.1R3-S13; 18.2 versions prior to 18.2R3-S8; 18.3 versions prior to 18.3R3-S5; 18.4 versions prior to 18.4R1-S8, 18.4R3-S8; 19.1 versions prior to 19.1R3-S4; 19.2 versions prior to 19.2R3-S2; 19.3 versions prior to 19.3R3-S1; 19.4 versions prior to 19.4R3-S1; 20.1 versions prior to 20.1R2; 20.2 versions prior to 20.2R2; 20.3 versions prior to 20.3R2."
            }
        ]
    },
    "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": "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"
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-770 Allocation of Resources Without Limits or Throttling"
                    }
                ]
            },
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "Denial of Service (DoS)"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "refsource": "MISC",
                "url": "https://kb.juniper.net/JSA11119",
                "name": "https://kb.juniper.net/JSA11119"
            }
        ]
    },
    "solution": [
        {
            "lang": "eng",
            "value": "The following software releases have been updated to resolve this specific issue: Junos OS 17.3R3-S12, 17.4R2-S13, 18.2R3-S8, 18.4R1-S8, 18.4R3-S8, 19.1R3-S4, 19.2R3-S2, 19.3R3-S1, 19.4R3-S1, 20.1R2, 20.1R3, 20.2R2, 20.2R3, 20.3R2, 20.4R1, and all subsequent releases.\n"
        }
    ],
    "source": {
        "advisory": "JSA11119",
        "defect": [
            "1544746"
        ],
        "discovery": "USER"
    },
    "work_around": [
        {
            "lang": "eng",
            "value": "There are no viable workarounds for this issue."
        }
    ]
}