CVE-2018-0056

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However, the Layer 2 Address Learning Daemon (L2ALD) daemon might crash when attempting to delete the duplicate MAC address when the particular entry is not found in the internal MAC address table. This issue only occurs on MX Series devices with l2-backhaul VPN configured. No other products or platforms are affected by this issue. Affected releases are Juniper Networks Junos OS: 15.1 versions prior to 15.1R7-S1 on MX Series; 16.1 versions prior to 16.1R4-S12, 16.1R6-S6 on MX Series; 16.2 versions prior to 16.2R2-S7 on MX Series; 17.1 versions prior to 17.1R2-S9 on MX Series; 17.2 versions prior to 17.2R1-S7, 17.2R2-S6 on MX Series; 17.3 versions prior to 17.3R2-S4, 17.3R3-S1 on MX Series; 17.4 versions prior to 17.4R1-S5 on MX Series; 18.1 versions prior to 18.1R2 on MX Series."}], "exploits": [{"lang": "en", "value": "Juniper SIRT is not aware of any malicious exploitation of this vulnerability."}], "metrics": [{"cvssV3_0": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.0"}}], "problemTypes": [{"descriptions": [{"description": "Denial of service", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2018-10-12T09:57:01.000Z", "orgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968", "shortName": "juniper"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "https://kb.juniper.net/JSA10890"}, {"name": "1041857", "tags": ["vdb-entry", "x_refsource_SECTRACK"], "url": "http://www.securitytracker.com/id/1041857"}], "solutions": [{"lang": "en", "value": "The following software releases have been updated to resolve this specific issue: 15.1R7-S1, 16.1R4-S12, 16.1R6-S6, 16.1R7, 16.2R2-S7, 16.2R3, 17.1R2-S9, 17.1R3, 17.2R1-S7, 17.2R2-S6, 17.2R3, 17.3R2-S4, 17.3R3-S1, 17.4R1-S5, 17.4R2, 18.1R2, 18.2R1, and all subsequent releases.\n\nThis fix has also been proactively committed into Junos OS: 15.1X49-D150, 15.1X53-D235, 15.1X53-D495, 15.1X53-D590, 15.1X53-D68, 18.2X75-D5, and all subsequent releases."}], "source": {"advisory": "JSA10890", "defect": ["1338688"], "discovery": "USER"}, "title": "MX Series: L2ALD daemon may crash if a duplicate MAC is learned by two different interfaces", "workarounds": [{"lang": "en", "value": "There are no viable workarounds for this issue"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "sirt@juniper.net", "DATE_PUBLIC": "2018-10-10T16:00:00.000Z", "ID": "CVE-2018-0056", "STATE": "PUBLIC", "TITLE": "MX Series: L2ALD daemon may crash if a duplicate MAC is learned by two different interfaces"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "Junos OS", "version": {"version_data": [{"affected": "<", "platform": "MX Series", "version_affected": "<", "version_name": "15.1", "version_value": "15.1R7-S1"}, {"affected": "<", "platform": "MX Series", "version_affected": "<", "version_name": "16.1", "version_value": "16.1R4-S12, 16.1R6-S6"}, {"affected": "<", "platform": "MX Series", "version_affected": "<", "version_name": "16.2", "version_value": "16.2R2-S7"}, {"affected": "<", "platform": "MX Series", "version_affected": "<", "version_name": "17.1", "version_value": "17.1R2-S9"}, {"affected": "<", "platform": "MX Series", "version_affected": "<", "version_name": "17.2", "version_value": "17.2R1-S7, 17.2R2-S6"}, {"affected": "<", "platform": "MX Series", "version_affected": "<", "version_name": "17.3", "version_value": "17.3R2-S4, 17.3R3-S1"}, {"affected": "<", "platform": "MX Series", "version_affected": "<", "version_name": "17.4", "version_value": "17.4R1-S5"}, {"affected": "<", "platform": "MX Series", "version_affected": "<", "version_name": "18.1", "version_value": "18.1R2"}]}}]}, "vendor_name": "Juniper Networks"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "If a duplicate MAC address is learned by two different interfaces on an MX Series device, the MAC address learning function correctly flaps between the interfaces. 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Affected releases are Juniper Networks Junos OS: 15.1 versions prior to 15.1R7-S1 on MX Series; 16.1 versions prior to 16.1R4-S12, 16.1R6-S6 on MX Series; 16.2 versions prior to 16.2R2-S7 on MX Series; 17.1 versions prior to 17.1R2-S9 on MX Series; 17.2 versions prior to 17.2R1-S7, 17.2R2-S6 on MX Series; 17.3 versions prior to 17.3R2-S4, 17.3R3-S1 on MX Series; 17.4 versions prior to 17.4R1-S5 on MX Series; 18.1 versions prior to 18.1R2 on MX Series."}]}, "exploit": [{"lang": "en", "value": "Juniper SIRT is not aware of any malicious exploitation of this vulnerability."}], "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:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.0"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "Denial of service"}]}]}, "references": {"reference_data": [{"name": "https://kb.juniper.net/JSA10890", "refsource": "CONFIRM", "url": "https://kb.juniper.net/JSA10890"}, {"name": "1041857", "refsource": "SECTRACK", "url": "http://www.securitytracker.com/id/1041857"}]}, "solution": [{"lang": "en", "value": "The following software releases have been updated to resolve this specific issue: 15.1R7-S1, 16.1R4-S12, 16.1R6-S6, 16.1R7, 16.2R2-S7, 16.2R3, 17.1R2-S9, 17.1R3, 17.2R1-S7, 17.2R2-S6, 17.2R3, 17.3R2-S4, 17.3R3-S1, 17.4R1-S5, 17.4R2, 18.1R2, 18.2R1, and all subsequent releases.\n\nThis fix has also been proactively committed into Junos OS: 15.1X49-D150, 15.1X53-D235, 15.1X53-D495, 15.1X53-D590, 15.1X53-D68, 18.2X75-D5, and all subsequent releases."}], "source": {"advisory": "JSA10890", "defect": ["1338688"], "discovery": "USER"}, "work_around": [{"lang": "en", "value": "There are no viable workarounds for this issue"}]}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-05T03:14:16.596Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://kb.juniper.net/JSA10890"}, {"name": "1041857", "tags": ["vdb-entry", "x_refsource_SECTRACK", "x_transferred"], "url": "http://www.securitytracker.com/id/1041857"}]}]}, "cveMetadata": {"assignerOrgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968", "assignerShortName": "juniper", "cveId": "CVE-2018-0056", "datePublished": "2018-10-10T18:00:00.000Z", "dateReserved": "2017-11-16T00:00:00.000Z", "dateUpdated": "2024-09-17T02:51:55.327Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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However, the Layer 2 Address Learning Daemon (L2ALD) daemon might crash when attempting to delete the duplicate MAC address when the particular entry is not found in the internal MAC address table. This issue only occurs on MX Series devices with l2-backhaul VPN configured. No other products or platforms are affected by this issue. Affected releases are Juniper Networks Junos OS: 15.1 versions prior to 15.1R7-S1 on MX Series; 16.1 versions prior to 16.1R4-S12, 16.1R6-S6 on MX Series; 16.2 versions prior to 16.2R2-S7 on MX Series; 17.1 versions prior to 17.1R2-S9 on MX Series; 17.2 versions prior to 17.2R1-S7, 17.2R2-S6 on MX Series; 17.3 versions prior to 17.3R2-S4, 17.3R3-S1 on MX Series; 17.4 versions prior to 17.4R1-S5 on MX Series; 18.1 versions prior to 18.1R2 on MX Series."}, {"lang": "es", "value": "Si una direcci\u00f3n MAC duplicada es aprendida por dos interfaces diferentes en un dispositivo MX Series, la funci\u00f3n de aprendizaje de direcciones MAC realiza flaps correctamente entre las interfaces. Sin embargo, el demonio L2ALD (Layer 2 Address Learning Daemon) podr\u00eda cerrarse inesperadamente al intentar eliminar la direcci\u00f3n MAC duplicada cuando esa entrada en concreto no se encuentra en la tabla interna de direcciones MAC. Este problema solo ocurre en los dispositivos MX Series con la VPN l2-backhaul configurada. No hay ning\u00fan otro producto o plataforma que se vea afectado por este problema. Las versiones afectadas de Juniper Networks Junos OS son: 15.1 en versiones anteriores a la 15.1R7-S1 en MX Series; 16.1 en versiones anteriores a la 16.1R4-S12, 16.1R6-S6 en MX Series; 16.2 en versiones anteriores a la 16.2R2-S7 en MX Series; 17.1 en versiones anteriores a la 17.1R2-S9 en MX Series; 17.2 en versiones anteriores a la 17.2R1-S7, 17.2R2-S6 en MX Series; 17.3 en versiones anteriores a la 17.3R2-S4, 17.3R3-S1 en MX Series; 17.4 en versiones anteriores a la 17.4R1-S5 en MX Series y 18.1 en versiones anteriores a la 18.1R2 en MX Series."}], "id": "CVE-2018-0056", "lastModified": "2026-06-17T01:29:30.263", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "LOW", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "ADJACENT_NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 2.9, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:A/AC:M/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 5.5, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"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:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.0"}, "exploitabilityScore": 2.8, "impactScore": 3.6, "source": "sirt@juniper.net", "type": "Secondary"}, {"cvssData": {"attackComplexity": "HIGH", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.0"}, "exploitabilityScore": 1.6, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2018-10-10T18:29:02.873", "references": [{"source": "sirt@juniper.net", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securitytracker.com/id/1041857"}, {"source": "sirt@juniper.net", "tags": ["Vendor Advisory"], "url": "https://kb.juniper.net/JSA10890"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securitytracker.com/id/1041857"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://kb.juniper.net/JSA10890"}], "sourceIdentifier": "sirt@juniper.net", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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