{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2024-21618",
        "ASSIGNER": "sirt@juniper.net",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "An Access of Memory Location After End of Buffer vulnerability in the Layer-2 Control Protocols Daemon (l2cpd) of Juniper Networks Junos OS and Junos OS Evolved allows an adjacent, unauthenticated attacker to cause Denial of Service (DoS).\n\nOn all Junos OS and Junos OS Evolved platforms, when LLDP is enabled on a specific interface, and a malformed LLDP packet is received, l2cpd crashes and restarts. The impact of the l2cpd crash is reinitialization of STP protocols (RSTP, MSTP or VSTP), and MVRP and ERP. Also, if any services depend on LLDP state (like PoE or VoIP device recognition), then these will also be affected.\n\nThis issue affects:\n\nJunos OS:\n  *  from 21.4 before 21.4R3-S4,\u00a0\n\n  *  from 22.1 before 22.1R3-S4,\u00a0\n\n  *  from 22.2 before 22.2R3-S2,\u00a0\n\n  *  from 22.3 before 22.3R2-S2, 22.3R3-S1,\u00a0\n\n  *  from 22.4 before 22.4R3,\u00a0\n\n  *  from 23.2 before 23.2R2.\n\n\n\n\n Junos OS Evolved:\n  *  from 21.4-EVO before 21.4R3-S5-EVO,\u00a0\n\n  *  from 22.1-EVO before 22.1R3-S4-EVO,\u00a0\n\n  *  from 22.2-EVO before 22.2R3-S2-EVO,\u00a0\n\n  *  from 22.3-EVO before 22.3R2-S2-EVO, 22.3R3-S1-EVO,\u00a0\n\n  *  from 22.4-EVO before 22.4R3-EVO,\u00a0\n\n  *  from 23.2-EVO before 23.2R2-EVO.\n\n\n\n\nThis issue does not affect:\n  *  Junos OS versions prior to 21.4R1;\n\n  *  Junos OS Evolved versions prior to 21.4R1-EVO."
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-788: Access of Memory Location After End of Buffer",
                        "cweId": "CWE-788"
                    }
                ]
            },
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "Denial of Service (DoS)"
                    }
                ]
            }
        ]
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "vendor_name": "Juniper Networks",
                    "product": {
                        "product_data": [
                            {
                                "product_name": "Junos OS",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
                                                "versions": [
                                                    {
                                                        "lessThan": "21.4R3-S4",
                                                        "status": "affected",
                                                        "version": "21.4",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "lessThan": "22.1R3-S4",
                                                        "status": "affected",
                                                        "version": "22.1",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "lessThan": "22.2R3-S2",
                                                        "status": "affected",
                                                        "version": "22.2",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "lessThan": "22.3R2-S2, 22.3R3-S1",
                                                        "status": "affected",
                                                        "version": "22.3",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "lessThan": "22.4R3",
                                                        "status": "affected",
                                                        "version": "22.4",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "lessThan": "23.2R2",
                                                        "status": "affected",
                                                        "version": "23.2",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "lessThan": "21.4R1",
                                                        "status": "unaffected",
                                                        "version": "0",
                                                        "versionType": "semver"
                                                    }
                                                ],
                                                "defaultStatus": "unaffected"
                                            }
                                        }
                                    ]
                                }
                            },
                            {
                                "product_name": "Junos OS Evolved",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_value": "not down converted",
                                            "x_cve_json_5_version_data": {
                                                "versions": [
                                                    {
                                                        "lessThan": "21.4R3-S5-EVO",
                                                        "status": "affected",
                                                        "version": "21.4-EVO",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "lessThan": "22.1R3-S4-EVO",
                                                        "status": "affected",
                                                        "version": "22.1-EVO",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "lessThan": "22.2R3-S2-EVO",
                                                        "status": "affected",
                                                        "version": "22.2-EVO",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "lessThan": "22.3R2-S2-EVO, 22.3R3-S1-EVO",
                                                        "status": "affected",
                                                        "version": "22.3-EVO",
                                                        "versionType": "semver"
                                                    },
                                                    {
                                                        "lessThan": "22.4R3-EVO",
                                                        "status": "affected",
                                                        "version": "22.4-EVO",
                                                        "versionType": "semver"
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                                                    {
                                                        "lessThan": "23.2R2-EVO",
                                                        "status": "affected",
                                                        "version": "23.2-EVO",
                                                        "versionType": "semver"
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                                                    {
                                                        "lessThan": "21.4R1-EVO",
                                                        "status": "unaffected",
                                                        "version": "0",
                                                        "versionType": "semver"
                                                    }
                                                ],
                                                "defaultStatus": "unaffected"
                                            }
                                        }
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                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "references": {
        "reference_data": [
            {
                "url": "https://supportportal.juniper.net/JSA75759",
                "refsource": "MISC",
                "name": "https://supportportal.juniper.net/JSA75759"
            },
            {
                "url": "https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L",
                "refsource": "MISC",
                "name": "https://www.first.org/cvss/calculator/4.0#CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L"
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        ]
    },
    "generator": {
        "engine": "Vulnogram 0.1.0-av217"
    },
    "source": {
        "advisory": "JSA75759",
        "defect": [
            "1747039"
        ],
        "discovery": "USER"
    },
    "configuration": [
        {
            "lang": "en",
            "supportingMedia": [
                {
                    "base64": false,
                    "type": "text/html",
                    "value": "<p>This vulnerability is only exploitable on interfaces with LLDP enabled.</p><tt>&nbsp; [protocols lldp interface]</tt>"
                }
            ],
            "value": "This vulnerability is only exploitable on interfaces with LLDP enabled.\n\n\u00a0 [protocols lldp interface]"
        }
    ],
    "work_around": [
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            "lang": "en",
            "supportingMedia": [
                {
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                    "type": "text/html",
                    "value": "<p>There are no available workarounds for this issue.</p><p>\u200b\u200b\u200b\u200b\u200b\u200b\u200b</p><p>But if LLDP and its services are not required, customers can disable LLDP.</p>"
                }
            ],
            "value": "There are no available workarounds for this issue.\n\n\u200b\u200b\u200b\u200b\u200b\u200b\u200b\n\nBut if LLDP and its services are not required, customers can disable LLDP."
        }
    ],
    "exploit": [
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            "lang": "en",
            "supportingMedia": [
                {
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                    "type": "text/html",
                    "value": "<p>Juniper SIRT is not aware of any malicious exploitation of this vulnerability.</p>"
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            ],
            "value": "Juniper SIRT is not aware of any malicious exploitation of this vulnerability."
        }
    ],
    "solution": [
        {
            "lang": "en",
            "supportingMedia": [
                {
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                    "type": "text/html",
                    "value": "<p>The following software releases have been updated to resolve this specific issue:</p><p>Junos OS: 21.4R3-S4, 22.1R3-S4, 22.2R3-S2, 22.3R2-S2, 22.3R3-S1, 22.4R3, 23.2R2, 23.4R1 and all subsequent releases.</p><p>Junos OS Evolved: 21.4R3-S5-EVO, 22.1R3-S4-EVO, 22.2R3-S2-EVO, 22.3R2-S2-EVO, 22.3R3-S1-EVO, 22.4R3-EVO, 23.2R2-EVO, 23.4R1-EVO and all subsequent releases.</p>"
                }
            ],
            "value": "The following software releases have been updated to resolve this specific issue:\n\nJunos OS: 21.4R3-S4, 22.1R3-S4, 22.2R3-S2, 22.3R2-S2, 22.3R3-S1, 22.4R3, 23.2R2, 23.4R1 and all subsequent releases.\n\nJunos OS Evolved: 21.4R3-S5-EVO, 22.1R3-S4-EVO, 22.2R3-S2-EVO, 22.3R2-S2-EVO, 22.3R3-S1-EVO, 22.4R3-EVO, 23.2R2-EVO, 23.4R1-EVO and all subsequent releases."
        }
    ],
    "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"
            }
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}