CVE-2024-21618

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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.<br><br>This issue affects:<br><br>Junos OS:<br><ul><li>from 21.4 before 21.4R3-S4,&nbsp;<br></li><li>from 22.1 before 22.1R3-S4,&nbsp;<br></li><li>from 22.2 before 22.2R3-S2,&nbsp;<br></li><li>from 22.3 before 22.3R2-S2, 22.3R3-S1,&nbsp;<br></li><li>from 22.4 before 22.4R3,&nbsp;<br></li><li>from 23.2 before 23.2R2.<br></li></ul><br> Junos OS Evolved:<br><ul><li>from 21.4-EVO before 21.4R3-S5-EVO,&nbsp;<br></li><li>from 22.1-EVO before 22.1R3-S4-EVO,&nbsp;<br></li><li>from 22.2-EVO before 22.2R3-S2-EVO,&nbsp;<br></li><li>from 22.3-EVO before 22.3R2-S2-EVO, 22.3R3-S1-EVO,&nbsp;<br></li><li>from 22.4-EVO before 22.4R3-EVO,&nbsp;<br></li><li>from 23.2-EVO before 23.2R2-EVO.<br></li></ul><br>This issue does not affect:<br><ul><li>Junos OS versions prior to 21.4R1;<br></li><li>Junos OS Evolved versions prior to 21.4R1-EVO.<br></li></ul>"}], "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."}], "exploits": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>Juniper SIRT is not aware of any malicious exploitation of 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[{"lang": "en", "supportingMedia": [{"base64": false, "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."}], "source": {"advisory": "JSA75759", "defect": ["1747039"], "discovery": "USER"}, "timeline": [{"lang": "en", "time": "2024-04-10T17:00:00.000Z", "value": "Initial Publication"}], "title": "Junos OS and Junos OS Evolved: When LLDP is enabled and a malformed LLDP packet is received, l2cpd crashes", "workarounds": [{"lang": "en", "supportingMedia": [{"base64": false, "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."}], "x_generator": {"engine": "Vulnogram 0.1.0-av217"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2024-07-11T13:59:35.301594Z", "id": "CVE-2024-21618", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", 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"23.2R2", "versionType": "semver"}, {"status": "unaffected", "version": "0", "lessThan": "21.4R1", "versionType": "semver"}], "defaultStatus": "unaffected"}, {"vendor": "Juniper Networks", "product": "Junos OS Evolved", "versions": [{"status": "affected", "version": "21.4-EVO", "lessThan": "21.4R3-S5-EVO", "versionType": "semver"}, {"status": "affected", "version": "22.1-EVO", "lessThan": "22.1R3-S4-EVO", "versionType": "semver"}, {"status": "affected", "version": "22.2-EVO", "lessThan": "22.2R3-S2-EVO", "versionType": "semver"}, {"status": "affected", "version": "22.3-EVO", "lessThan": "22.3R2-S2-EVO, 22.3R3-S1-EVO", "versionType": "semver"}, {"status": "affected", "version": "22.4-EVO", "lessThan": "22.4R3-EVO", "versionType": "semver"}, {"status": "affected", "version": "23.2-EVO", "lessThan": "23.2R2-EVO", "versionType": "semver"}, {"status": "unaffected", "version": "0", "lessThan": "21.4R1-EVO", "versionType": "semver"}], "defaultStatus": "unaffected"}], "exploits": [{"lang": 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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>", "base64": false}]}], "datePublic": "2024-04-10T17:00:00.000Z", "references": [{"url": "https://supportportal.juniper.net/JSA75759", "tags": ["vendor-advisory"]}, {"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", "tags": ["technical-description"]}], "workarounds": [{"lang": "en", "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.", "supportingMedia": [{"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>", "base64": false}]}], "x_generator": {"engine": "Vulnogram 0.1.0-av217"}, "descriptions": [{"lang": "en", "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.", "supportingMedia": [{"type": "text/html", "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).<br><br>On 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.<br><br>This issue affects:<br><br>Junos OS:<br><ul><li>from 21.4 before 21.4R3-S4,&nbsp;<br></li><li>from 22.1 before 22.1R3-S4,&nbsp;<br></li><li>from 22.2 before 22.2R3-S2,&nbsp;<br></li><li>from 22.3 before 22.3R2-S2, 22.3R3-S1,&nbsp;<br></li><li>from 22.4 before 22.4R3,&nbsp;<br></li><li>from 23.2 before 23.2R2.<br></li></ul><br> Junos OS Evolved:<br><ul><li>from 21.4-EVO before 21.4R3-S5-EVO,&nbsp;<br></li><li>from 22.1-EVO before 22.1R3-S4-EVO,&nbsp;<br></li><li>from 22.2-EVO before 22.2R3-S2-EVO,&nbsp;<br></li><li>from 22.3-EVO before 22.3R2-S2-EVO, 22.3R3-S1-EVO,&nbsp;<br></li><li>from 22.4-EVO before 22.4R3-EVO,&nbsp;<br></li><li>from 23.2-EVO before 23.2R2-EVO.<br></li></ul><br>This issue does not affect:<br><ul><li>Junos OS versions prior to 21.4R1;<br></li><li>Junos OS Evolved versions prior to 21.4R1-EVO.<br></li></ul>", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-788", "description": "CWE-788: Access of Memory Location After End of Buffer"}]}, {"descriptions": [{"lang": "en", "description": "Denial of Service (DoS)"}]}], "configurations": [{"lang": "en", "value": "This vulnerability is only exploitable on interfaces with LLDP enabled.\n\n\u00a0 [protocols lldp interface]", "supportingMedia": [{"type": "text/html", "value": "<p>This vulnerability is only exploitable on interfaces with LLDP enabled.</p><tt>&nbsp; [protocols lldp interface]</tt>", "base64": false}]}], "providerMetadata": {"orgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968", "shortName": "juniper", "dateUpdated": "2024-05-16T20:12:38.203Z"}}}, "cveMetadata": {"cveId": "CVE-2024-21618", "state": "PUBLISHED", "dateUpdated": "2024-08-01T22:27:35.779Z", "dateReserved": "2023-12-27T19:38:25.710Z", "assignerOrgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968", "datePublished": "2024-04-12T14:55:52.241Z", "assignerShortName": "juniper"}, "dataVersion": "5.1"}

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(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."}, {"lang": "es", "value": "Una vulnerabilidad de acceso a la ubicaci\u00f3n de la memoria despu\u00e9s del fin del b\u00fafer en el daemon de protocolos de control de capa 2 (l2cpd) de Juniper Networks Junos OS y Junos OS Evolved permite que un atacante adyacente no autenticado provoque una denegaci\u00f3n de servicio (DoS). En todas las plataformas Junos OS y Junos OS Evolved, cuando LLDP est\u00e1 habilitado en una interfaz espec\u00edfica y se recibe un paquete LLDP con formato incorrecto, l2cpd falla y se reinicia. El impacto del fallo de l2cpd es la reinicializaci\u00f3n de los protocolos STP (RSTP, MSTP o VSTP) y MVRP y ERP. Adem\u00e1s, si alg\u00fan servicio depende del estado de LLDP (como PoE o reconocimiento de dispositivo VoIP), tambi\u00e9n se ver\u00e1 afectado. Este problema afecta a: Junos OS: * desde 21.4 anterior a 21.4R3-S4, * desde 22.1 anterior a 22.1R3-S4, * desde 22.2 anterior a 22.2R3-S2, * desde 22.3 anterior a 22.3R2-S2, 22.3R3-S1, * desde 22.4 antes de 22.4R3, * de 23.2 antes de 23.2R2. Junos OS Evolved: * desde 21.4-EVO antes de 21.4R3-S5-EVO, * desde 22.1-EVO antes de 22.1R3-S4-EVO, * desde 22.2-EVO antes de 22.2R3-S2-EVO, * desde 22.3-EVO antes de 22.3 R2-S2-EVO, 22.3R3-S1-EVO, *de 22.4-EVO antes de 22.4R3-EVO, *de 23.2-EVO antes de 23.2R2-EVO. Este problema no afecta: * Versiones de Junos OS anteriores a 21.4R1; * Versiones de Junos OS Evolved anteriores a 21.4R1-EVO."}], "id": "CVE-2024-21618", "lastModified": "2026-06-17T07:09:51.280", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "sirt@juniper.net", "type": "Secondary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "ADJACENT", "availabilityRequirement": "NOT_DEFINED", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "sirt@juniper.net", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-21618", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-07-11T13:59:35.301594Z", "version": "2.0.3"}}]}, "published": "2024-04-12T15:15:24.350", "references": [{"source": "sirt@juniper.net", "tags": ["Issue Tracking", "Vendor Advisory"], "url": "https://supportportal.juniper.net/JSA75759"}, {"source": "sirt@juniper.net", "tags": ["Issue Tracking", "Vendor Advisory"], "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"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Vendor Advisory"], "url": "https://supportportal.juniper.net/JSA75759"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Vendor Advisory"], "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"}], "sourceIdentifier": "sirt@juniper.net", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-788"}], "source": "sirt@juniper.net", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-125"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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