CVE-2021-0297

{"containers": {"cna": {"affected": [{"product": "Junos OS Evolved", "vendor": "Juniper Networks", "versions": [{"lessThan": "20.3R2-S1-EVO", "status": "affected", "version": "unspecified", "versionType": "custom"}, {"lessThan": "20.4R2-EVO", "status": "affected", "version": "20.4", "versionType": "custom"}, {"lessThan": "21.1R2-EVO", "status": "affected", "version": "21.1", "versionType": "custom"}]}], "datePublic": "2021-10-13T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "A vulnerability in the processing of TCP MD5 authentication in Juniper Networks Junos OS Evolved may allow a BGP or LDP session configured with MD5 authentication to succeed, even if the peer does not have TCP MD5 authentication enabled. This could lead to untrusted or unauthorized sessions being established, resulting in an impact on confidentiality or stability of the network. This issue affects Juniper Networks Junos OS Evolved: All versions prior to 20.3R2-S1-EVO; 20.4 versions prior to 20.4R2-EVO; 21.1 versions prior to 21.1R2-EVO. Juniper Networks Junos OS is not affected by this issue."}], "exploits": [{"lang": "en", "value": "Juniper SIRT is not aware of any malicious exploitation of this vulnerability."}], "metrics": [{"cvssV3_1": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N", "version": "3.1"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-755", "description": "CWE-755 Improper Handling of Exceptional Conditions", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2021-10-19T18:16:23.000Z", "orgId": "8cbe9d5a-a066-4c94-8978-4b15efeae968", "shortName": "juniper"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "https://kb.juniper.net/JSA11211"}], "solutions": [{"lang": "en", "value": "The following software releases have been updated to resolve this specific issue: Junos OS Evolved 20.3R2-S1-EVO, 20.4R2-EVO, 21.1R2-EVO, 21.2R1-EVO, and all subsequent releases."}], "source": {"advisory": "JSA11211", "defect": ["1569843"], "discovery": "INTERNAL"}, "title": "Junos OS Evolved: BGP and LDP sessions with TCP MD5 authentication established with peers not configured for authentication", "workarounds": [{"lang": "en", "value": "There are no known workarounds for this issue."}], "x_generator": {"engine": "Vulnogram 0.0.9"}, "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "sirt@juniper.net", "DATE_PUBLIC": "2021-10-13T16:00:00.000Z", "ID": "CVE-2021-0297", "STATE": "PUBLIC", "TITLE": "Junos OS Evolved: BGP and LDP sessions with TCP MD5 authentication established with peers not configured for authentication"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "Junos OS Evolved", "version": {"version_data": [{"version_affected": "<", "version_value": "20.3R2-S1-EVO"}, {"version_affected": "<", "version_name": "20.4", "version_value": "20.4R2-EVO"}, {"version_affected": "<", "version_name": "21.1", "version_value": "21.1R2-EVO"}]}}]}, "vendor_name": "Juniper Networks"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "A vulnerability in the processing of TCP MD5 authentication in Juniper Networks Junos OS Evolved may allow a BGP or LDP session configured with MD5 authentication to succeed, even if the peer does not have TCP MD5 authentication enabled. This could lead to untrusted or unauthorized sessions being established, resulting in an impact on confidentiality or stability of the network. This issue affects Juniper Networks Junos OS Evolved: All versions prior to 20.3R2-S1-EVO; 20.4 versions prior to 20.4R2-EVO; 21.1 versions prior to 21.1R2-EVO. 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{"affected": [{"affectedData": [{"product": "Junos OS Evolved", "vendor": "Juniper Networks", "versions": [{"lessThan": "20.3R2-S1-EVO", "status": "affected", "version": "unspecified", "versionType": "custom"}, {"lessThan": "20.4R2-EVO", "status": "affected", "version": "20.4", "versionType": "custom"}, {"lessThan": "21.1R2-EVO", "status": "affected", "version": "21.1", "versionType": "custom"}]}], "source": "sirt@juniper.net"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:juniper:junos_os_evolved:20.3:r1:*:*:*:*:*:*", "matchCriteriaId": "4AFB91E3-CAAC-429F-A869-DDD40FB0F84D", "vulnerable": true}, {"criteria": "cpe:2.3:o:juniper:junos_os_evolved:20.3:r1-s1:*:*:*:*:*:*", "matchCriteriaId": "0A9CA997-2DDA-4808-B2AE-8804FEB798B2", "vulnerable": true}, {"criteria": "cpe:2.3:o:juniper:junos_os_evolved:20.3:r2:*:*:*:*:*:*", "matchCriteriaId": "423843B3-B2BE-427B-B625-4E3146D26390", "vulnerable": true}, {"criteria": "cpe:2.3:o:juniper:junos_os_evolved:20.4:r1:*:*:*:*:*:*", "matchCriteriaId": "C9C8866D-162F-4C9B-8167-2FBA25410368", "vulnerable": true}, {"criteria": "cpe:2.3:o:juniper:junos_os_evolved:21.1:r1:*:*:*:*:*:*", "matchCriteriaId": "AE674DD3-3590-4434-B144-5AD7EB5F039D", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability in the processing of TCP MD5 authentication in Juniper Networks Junos OS Evolved may allow a BGP or LDP session configured with MD5 authentication to succeed, even if the peer does not have TCP MD5 authentication enabled. This could lead to untrusted or unauthorized sessions being established, resulting in an impact on confidentiality or stability of the network. This issue affects Juniper Networks Junos OS Evolved: All versions prior to 20.3R2-S1-EVO; 20.4 versions prior to 20.4R2-EVO; 21.1 versions prior to 21.1R2-EVO. Juniper Networks Junos OS is not affected by this issue."}, {"lang": "es", "value": "Una vulnerabilidad en el procesamiento de la autenticaci\u00f3n TCP MD5 en Juniper Networks Junos OS Evolved puede permitir a una sesi\u00f3n BGP o LDP configurada con autenticaci\u00f3n MD5 tener \u00e9xito, incluso si el peer no tiene habilitada la autenticaci\u00f3n TCP MD5. Esto podr\u00eda conllevar a el establecimiento de sesiones no confiables o no autorizadas, lo que tendr\u00eda un impacto en la confidencialidad o la estabilidad de la red. Este problema afecta a Juniper Networks Junos OS Evolved: Todas las versiones anteriores a 20.3R2-S1-EVO; versiones 20.4 anteriores a 20.4R2-EVO; versiones 21.1 anteriores a 21.1R2-EVO. Juniper Networks Junos OS no est\u00e1 afectado por este problema"}], "id": "CVE-2021-0297", "lastModified": "2026-06-17T03:29:44.910", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 6.4, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 4.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 2.5, "source": "sirt@juniper.net", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 2.5, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-10-19T19:15:08.290", "references": [{"source": "sirt@juniper.net", "tags": ["Vendor Advisory"], "url": "https://kb.juniper.net/JSA11211"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://kb.juniper.net/JSA11211"}], "sourceIdentifier": "sirt@juniper.net", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-755"}], "source": "sirt@juniper.net", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-755"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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