{"containers": {"cna": {"affected": [{"product": "Cisco NX-OS Software", "vendor": "Cisco", "versions": [{"status": "affected", "version": "9.2(1)"}]}], "datePublic": "2020-02-26T00:00:00", "descriptions": [{"lang": "en", "value": "A vulnerability in the implementation of Border Gateway Protocol (BGP) Message Digest 5 (MD5) authentication in Cisco NX-OS Software could allow an unauthenticated, remote attacker to bypass MD5 authentication and establish a BGP connection with the device. The vulnerability occurs because the BGP MD5 authentication is bypassed if the peer does not have MD5 authentication configured, the NX-OS device does have BGP MD5 authentication configured, and the NX-OS BGP virtual routing and forwarding (VRF) name is configured to be greater than 19 characters. An attacker could exploit this vulnerability by attempting to establish a BGP session with the NX-OS peer. A successful exploit could allow the attacker to establish a BGP session with the NX-OS device without MD5 authentication. The Cisco implementation of the BGP protocol accepts incoming BGP traffic only from explicitly configured peers. To exploit this vulnerability, an attacker must send the malicious packets over a TCP connection that appears to come from a trusted BGP peer. To do so, the attacker must obtain information about the BGP peers in the affected system’s trusted network."}], "exploits": [{"lang": "en", "value": "The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory. "}], "metrics": [{"cvssV3_0": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.2, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N", "version": "3.0"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-798", "description": "CWE-798", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2020-02-26T16:45:18", "orgId": "d1c1063e-7a18-46af-9102-31f8928bc633", "shortName": "cisco"}, "references": [{"name": "20200226 Cisco NX-OS Software Border Gateway Protocol MD5 Authentication Bypass Vulnerability", "tags": ["vendor-advisory", "x_refsource_CISCO"], "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200226-nxos-bgpmd5"}], "source": {"advisory": "cisco-sa-20200226-nxos-bgpmd5", "defect": [["CSCvq72707"]], "discovery": "INTERNAL"}, "title": "Cisco NX-OS Software Border Gateway Protocol MD5 Authentication Bypass Vulnerability", "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "psirt@cisco.com", "DATE_PUBLIC": "2020-02-26T16:00:00-0800", "ID": "CVE-2020-3165", "STATE": "PUBLIC", "TITLE": "Cisco NX-OS Software Border Gateway Protocol MD5 Authentication Bypass Vulnerability"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "Cisco NX-OS Software", "version": {"version_data": [{"affected": "=", "version_affected": "=", "version_value": "9.2(1)"}]}}]}, "vendor_name": "Cisco"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "A vulnerability in the implementation of Border Gateway Protocol (BGP) Message Digest 5 (MD5) authentication in Cisco NX-OS Software could allow an unauthenticated, remote attacker to bypass MD5 authentication and establish a BGP connection with the device. The vulnerability occurs because the BGP MD5 authentication is bypassed if the peer does not have MD5 authentication configured, the NX-OS device does have BGP MD5 authentication configured, and the NX-OS BGP virtual routing and forwarding (VRF) name is configured to be greater than 19 characters. An attacker could exploit this vulnerability by attempting to establish a BGP session with the NX-OS peer. A successful exploit could allow the attacker to establish a BGP session with the NX-OS device without MD5 authentication. The Cisco implementation of the BGP protocol accepts incoming BGP traffic only from explicitly configured peers. To exploit this vulnerability, an attacker must send the malicious packets over a TCP connection that appears to come from a trusted BGP peer. To do so, the attacker must obtain information about the BGP peers in the affected system’s trusted network."}]}, "exploit": [{"lang": "en", "value": "The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory. "}], "impact": {"cvss": {"baseScore": "8.2", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N ", "version": "3.0"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-798"}]}]}, "references": {"reference_data": [{"name": "20200226 Cisco NX-OS Software Border Gateway Protocol MD5 Authentication Bypass Vulnerability", "refsource": "CISCO", "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200226-nxos-bgpmd5"}]}, "source": {"advisory": "cisco-sa-20200226-nxos-bgpmd5", "defect": [["CSCvq72707"]], "discovery": "INTERNAL"}}}}, "cveMetadata": {"assignerOrgId": "d1c1063e-7a18-46af-9102-31f8928bc633", "assignerShortName": "cisco", "cveId": "CVE-2020-3165", "datePublished": "2020-02-26T00:00:00", "dateReserved": "2019-12-12T00:00:00", "dateUpdated": "2020-02-26T16:45:18", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.0"}

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"descriptions": [{"lang": "en", "value": "A vulnerability in the implementation of Border Gateway Protocol (BGP) Message Digest 5 (MD5) authentication in Cisco NX-OS Software could allow an unauthenticated, remote attacker to bypass MD5 authentication and establish a BGP connection with the device. The vulnerability occurs because the BGP MD5 authentication is bypassed if the peer does not have MD5 authentication configured, the NX-OS device does have BGP MD5 authentication configured, and the NX-OS BGP virtual routing and forwarding (VRF) name is configured to be greater than 19 characters. An attacker could exploit this vulnerability by attempting to establish a BGP session with the NX-OS peer. A successful exploit could allow the attacker to establish a BGP session with the NX-OS device without MD5 authentication. The Cisco implementation of the BGP protocol accepts incoming BGP traffic only from explicitly configured peers. To exploit this vulnerability, an attacker must send the malicious packets over a TCP connection that appears to come from a trusted BGP peer. To do so, the attacker must obtain information about the BGP peers in the affected system’s trusted network."}, {"lang": "es", "value": "Una vulnerabilidad en la implementaci\u00f3n de la autenticaci\u00f3n de Message Digest 5 (MD5) de Border Gateway Protocol (BG5) en Cisco NX-OS Software, podr\u00eda permitir a un atacante remoto no autenticado omitir la autenticaci\u00f3n MD5 y establecer una conexi\u00f3n BGP con el dispositivo. La vulnerabilidad ocurre porque la autenticaci\u00f3n BGP MD5 es omitida si el peer no tiene la autenticaci\u00f3n MD5 configurada, el dispositivo NX-OS presenta la autenticaci\u00f3n BGP MD5 configurada y el nombre de NX-OS BGP virtual routing and forwarding (VRF) est\u00e1 configurado para ser mayor de 19 caracteres Un atacante podr\u00eda explotar esta vulnerabilidad al intentar establecer una sesi\u00f3n BGP con el peer NX-OS. Una explotaci\u00f3n con \u00e9xito podr\u00eda permitir al atacante establecer una sesi\u00f3n BGP con el dispositivo NX-OS sin autenticaci\u00f3n MD5. La implementaci\u00f3n de Cisco del protocolo BGP acepta el tr\u00e1fico BGP entrante solo de peers configurados expl\u00edcitamente. Para explotar esta vulnerabilidad, un atacante debe enviar los paquetes maliciosos por medio de una conexi\u00f3n TCP que parece provenir desde un peer BGP de confianza. Para hacerlo, el atacante debe obtener informaci\u00f3n sobre los peers BGP en la red confiable system\u2019s afectada."}], "id": "CVE-2020-3165", "lastModified": "2020-03-04T16:29:09.767", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 4.3, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.2, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N", "version": "3.0"}, "exploitabilityScore": 3.9, "impactScore": 4.2, "source": "ykramarz@cisco.com", "type": "Secondary"}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 8.2, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 4.2, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2020-02-26T17:15:12.673", "references": [{"source": "ykramarz@cisco.com", "tags": ["Vendor Advisory"], "url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200226-nxos-bgpmd5"}], "sourceIdentifier": "ykramarz@cisco.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-798"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-798"}], "source": "ykramarz@cisco.com", "type": "Secondary"}]}

{}