CVE-2021-0205

{"containers": {"cna": {"affected": [{"platforms": ["MX Series"], "product": "Junos OS", "vendor": "Juniper Networks", "versions": [{"lessThan": "17.3R3-S10", "status": "affected", "version": "17.3", "versionType": "custom"}, {"lessThan": "17.4R3-S3", "status": "affected", "version": "17.4", "versionType": "custom"}, {"lessThan": "18.1R3-S11", "status": "affected", "version": "18.1", "versionType": "custom"}, {"lessThan": "18.2R3-S6", "status": "affected", "version": "18.2", "versionType": "custom"}, {"lessThan": "18.3R3-S4", "status": "affected", "version": "18.3", "versionType": "custom"}, {"lessThan": "18.4R3-S6", "status": "affected", "version": "18.4", "versionType": "custom"}, {"lessThan": "19.1R2-S2, 19.1R3-S3", "status": "affected", "version": "19.1", "versionType": "custom"}, {"lessThan": "19.2R3-S1", "status": "affected", "version": "19.2", "versionType": "custom"}, {"lessThan": "19.3R2-S5, 19.3R3-S1", "status": "affected", "version": "19.3", "versionType": "custom"}, {"lessThan": "19.4R3", "status": "affected", "version": "19.4", "versionType": "custom"}, {"lessThan": "20.1R2", "status": "affected", "version": "20.1", "versionType": "custom"}, {"lessThan": "20.2R2", "status": "affected", "version": "20.2", "versionType": "custom"}]}], "configurations": [{"lang": "en", "value": "The example of the configuration stanza affected by this issue is as follows:\n [services ids]"}], "datePublic": "2021-01-13T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "When the \"Intrusion Detection Service\" (IDS) feature is configured on Juniper Networks MX series with a dynamic firewall filter using IPv6 source or destination prefix, it may incorrectly match the prefix as /32, causing the filter to block unexpected traffic. This issue affects only IPv6 prefixes when used as source and destination. This issue affects MX Series devices using MS-MPC, MS-MIC or MS-SPC3 service cards with IDS service configured. This issue affects: Juniper Networks Junos OS 17.3 versions prior to 17.3R3-S10 on MX Series; 17.4 versions prior to 17.4R3-S3 on MX Series; 18.1 versions prior to 18.1R3-S11 on MX Series; 18.2 versions prior to 18.2R3-S6 on MX Series; 18.3 versions prior to 18.3R3-S4 on MX Series; 18.4 versions prior to 18.4R3-S6 on MX Series; 19.1 versions prior to 19.1R2-S2, 19.1R3-S3 on MX Series; 19.2 versions prior to 19.2R3-S1 on MX Series; 19.3 versions prior to 19.3R2-S5, 19.3R3-S1 on MX Series; 19.4 versions prior to 19.4R3 on MX Series; 20.1 versions prior to 20.1R2 on MX Series; 20.2 versions prior to 20.2R2 on MX Series;"}], "exploits": [{"lang": "en", "value": "Juniper SIRT is not aware of any malicious exploitation of this vulnerability."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L", "version": "3.1"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-284", "description": "CWE-284 Improper Access Control", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2021-01-15T17:35:53.000Z", "orgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968", "shortName": "juniper"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "https://kb.juniper.net/JSA11095"}], "solutions": [{"lang": "en", "value": "The following software releases have been updated to resolve this specific issue: \n\nJunos OS: 17.3R3-S10, 17.4R3-S3, 18.1R3-S11, 18.2R3-S6, 18.3R3-S4, 18.4R3-S6, 19.1R2-S2, 19.1R3-S3, 19.2R3-S1, 19.3R2-S5, 19.3R3-S1, 19.4R3, 20.1R2, 20.2R2, 20.3R1 and all subsequent releases."}], "source": {"advisory": "JSA11095", "defect": ["1536100"], "discovery": "USER"}, "title": "Junos OS: MX Series: Dynamic filter fails to match IPv6 prefix", "workarounds": [{"lang": "en", "value": "IDS configuration can be disabled."}], "x_generator": {"engine": "Vulnogram 0.0.9"}, "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "sirt@juniper.net", "DATE_PUBLIC": "2021-01-13T17:00:00.000Z", "ID": "CVE-2021-0205", "STATE": "PUBLIC", "TITLE": "Junos OS: MX Series: Dynamic filter fails to match IPv6 prefix"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "Junos OS", "version": {"version_data": [{"platform": "MX Series", "version_affected": "<", "version_name": "17.3", "version_value": "17.3R3-S10"}, {"platform": "MX Series", "version_affected": "<", "version_name": "17.4", "version_value": "17.4R3-S3"}, {"platform": "MX Series", "version_affected": "<", "version_name": "18.1", "version_value": "18.1R3-S11"}, {"platform": "MX Series", "version_affected": "<", "version_name": "18.2", "version_value": "18.2R3-S6"}, {"platform": "MX Series", "version_affected": "<", "version_name": "18.3", "version_value": "18.3R3-S4"}, {"platform": "MX Series", "version_affected": "<", "version_name": "18.4", "version_value": "18.4R3-S6"}, {"platform": "MX Series", "version_affected": "<", "version_name": "19.1", "version_value": "19.1R2-S2, 19.1R3-S3"}, {"platform": "MX Series", "version_affected": "<", "version_name": "19.2", "version_value": "19.2R3-S1"}, {"platform": "MX Series", "version_affected": "<", "version_name": "19.3", "version_value": "19.3R2-S5, 19.3R3-S1"}, {"platform": "MX Series", "version_affected": "<", "version_name": "19.4", "version_value": "19.4R3"}, {"platform": "MX Series", "version_affected": "<", "version_name": "20.1", "version_value": "20.1R2"}, {"platform": "MX Series", "version_affected": "<", "version_name": "20.2", "version_value": "20.2R2"}]}}]}, "vendor_name": "Juniper Networks"}]}}, "configuration": [{"lang": "en", "value": "The example of the configuration stanza affected by this issue is as follows:\n [services ids]"}], "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "When the \"Intrusion Detection Service\" (IDS) feature is configured on Juniper Networks MX series with a dynamic firewall filter using IPv6 source or destination prefix, it may incorrectly match the prefix as /32, causing the filter to block unexpected traffic. This issue affects only IPv6 prefixes when used as source and destination. This issue affects MX Series devices using MS-MPC, MS-MIC or MS-SPC3 service cards with IDS service configured. This issue affects: Juniper Networks Junos OS 17.3 versions prior to 17.3R3-S10 on MX Series; 17.4 versions prior to 17.4R3-S3 on MX Series; 18.1 versions prior to 18.1R3-S11 on MX Series; 18.2 versions prior to 18.2R3-S6 on MX Series; 18.3 versions prior to 18.3R3-S4 on MX Series; 18.4 versions prior to 18.4R3-S6 on MX Series; 19.1 versions prior to 19.1R2-S2, 19.1R3-S3 on MX Series; 19.2 versions prior to 19.2R3-S1 on MX Series; 19.3 versions prior to 19.3R2-S5, 19.3R3-S1 on MX Series; 19.4 versions prior to 19.4R3 on MX Series; 20.1 versions prior to 20.1R2 on MX Series; 20.2 versions prior to 20.2R2 on MX Series;"}]}, "exploit": [{"lang": "en", "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": "LOW", "baseScore": 5.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L", "version": "3.1"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-284 Improper Access Control"}]}]}, "references": {"reference_data": [{"name": "https://kb.juniper.net/JSA11095", "refsource": "CONFIRM", "url": "https://kb.juniper.net/JSA11095"}]}, "solution": [{"lang": "en", "value": "The following software releases have been updated to resolve this specific issue: \n\nJunos OS: 17.3R3-S10, 17.4R3-S3, 18.1R3-S11, 18.2R3-S6, 18.3R3-S4, 18.4R3-S6, 19.1R2-S2, 19.1R3-S3, 19.2R3-S1, 19.3R2-S5, 19.3R3-S1, 19.4R3, 20.1R2, 20.2R2, 20.3R1 and all subsequent releases."}], "source": {"advisory": "JSA11095", "defect": ["1536100"], "discovery": "USER"}, "work_around": [{"lang": "en", "value": "IDS configuration can be disabled."}]}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T15:32:10.287Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://kb.juniper.net/JSA11095"}]}]}, "cveMetadata": {"assignerOrgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968", "assignerShortName": "juniper", "cveId": "CVE-2021-0205", "datePublished": "2021-01-15T17:35:53.539Z", "dateReserved": "2020-10-27T00:00:00.000Z", "dateUpdated": "2024-09-16T17:28:25.455Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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This issue affects only IPv6 prefixes when used as source and destination. This issue affects MX Series devices using MS-MPC, MS-MIC or MS-SPC3 service cards with IDS service configured. This issue affects: Juniper Networks Junos OS 17.3 versions prior to 17.3R3-S10 on MX Series; 17.4 versions prior to 17.4R3-S3 on MX Series; 18.1 versions prior to 18.1R3-S11 on MX Series; 18.2 versions prior to 18.2R3-S6 on MX Series; 18.3 versions prior to 18.3R3-S4 on MX Series; 18.4 versions prior to 18.4R3-S6 on MX Series; 19.1 versions prior to 19.1R2-S2, 19.1R3-S3 on MX Series; 19.2 versions prior to 19.2R3-S1 on MX Series; 19.3 versions prior to 19.3R2-S5, 19.3R3-S1 on MX Series; 19.4 versions prior to 19.4R3 on MX Series; 20.1 versions prior to 20.1R2 on MX Series; 20.2 versions prior to 20.2R2 on MX Series;"}, {"lang": "es", "value": "Cuando la funcionalidad \"Intrusion Detection Service\" (IDS) est\u00e1 configurada en la serie Juniper Networks MX con un filtro de firewall din\u00e1mico usando el prefijo de origen o destino de IPv6, puede coincidir incorrectamente con el prefijo como /32, causando que el filtro bloquee el tr\u00e1fico inesperado.&#xa0;Este problema afecta solo a los prefijos de IPv6 cuando se utilizan como origen y destino.&#xa0;Este problema afecta a los dispositivos de la Serie MX que utilizan tarjetas de servicio MS-MPC, MS-MIC o MS-SPC3 con el servicio IDS configurado.&#xa0;Este problema afecta a: Juniper Networks Junos OS versiones 17.3 anteriores a 17.3R3-S10 en la Serie MX;&#xa0;versiones 17.4 anteriores a 17.4R3-S3 en la Serie MX;&#xa0;versiones 18.1 anteriores a 18.1R3-S11 en la Serie MX;&#xa0;versiones 18.2 anteriores a 18.2R3-S6 en la Serie MX;&#xa0;versiones 18.3 anteriores a 18.3R3-S4 en la Serie MX;&#xa0;versiones 18.4 anteriores a 18.4R3-S6 en la Serie MX;&#xa0;versiones 19.1 anteriores a 19.1R2-S2, 19.1R3-S3 en la Serie MX;&#xa0;versiones 19.2 anteriores a 19.2R3-S1 en la Serie MX;&#xa0;versiones 19.3 anteriores a 19.3R2-S5, 19.3R3-S1 en la Serie MX;&#xa0;versiones 19.4 anteriores a 19.4R3 en la Serie MX;&#xa0;20.1 versiones anteriores a 20.1R2 en la Serie MX;&#xa0;20.2 versiones anteriores a 20.2R2 en la Serie MX"}], "id": "CVE-2021-0205", "lastModified": "2026-06-17T03:29:28.817", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 4.3, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "sirt@juniper.net", "type": "Secondary"}]}, "published": "2021-01-15T18:15:14.697", "references": [{"source": "sirt@juniper.net", "tags": ["Vendor Advisory"], "url": "https://kb.juniper.net/JSA11095"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://kb.juniper.net/JSA11095"}], "sourceIdentifier": "sirt@juniper.net", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-284"}], "source": "sirt@juniper.net", "type": "Secondary"}, {"description": [{"lang": "en", "value": "NVD-CWE-Other"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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