CVE-2019-1890 (GCVE-0-2019-1890)

Vulnerability from cvelistv5 – Published: 2019-07-04 20:00 – Updated: 2024-11-21 19:20
VLAI?
Summary
A vulnerability in the fabric infrastructure VLAN connection establishment of the Cisco Nexus 9000 Series Application Centric Infrastructure (ACI) Mode Switch Software could allow an unauthenticated, adjacent attacker to bypass security validations and connect an unauthorized server to the infrastructure VLAN. The vulnerability is due to insufficient security requirements during the Link Layer Discovery Protocol (LLDP) setup phase of the infrastructure VLAN. An attacker could exploit this vulnerability by sending a malicious LLDP packet on the adjacent subnet to the Cisco Nexus 9000 Series Switch in ACI mode. A successful exploit could allow the attacker to connect an unauthorized server to the infrastructure VLAN, which is highly privileged. With a connection to the infrastructure VLAN, the attacker can make unauthorized connections to Cisco Application Policy Infrastructure Controller (APIC) services or join other host endpoints.
Severity ?
7.4 (High)
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
CWE
Assigner
References
https://tools.cisco.com/security/center/content/C… vendor-advisoryx_refsource_CISCO
http://www.securityfocus.com/bid/109052 vdb-entryx_refsource_BID
Impacted products
Vendor Product Version
Cisco Cisco NX-OS System Software in ACI Mode 11.0.1b Affected: unspecified , < 14.1(2g) (custom)
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Un atacante podr\u00eda aprovechar esta vulnerabilidad enviando un paquete LLDP malintencionado en la subred adyacente al conmutador Cisco Nexus 9000 Series en modo ACI. Una explotaci\u00f3n con \u00e9xito podr\u00eda permitir que el atacante conecte un servidor no autorizado a la infraestructura VLAN, que es altamente privilegiada. Con una conexi\u00f3n a la VLAN de infraestructura, el atacante puede realizar conexiones no autorizadas a los servicios Cisco Application Policy Infrastructure Controller (APIC) o unirse a otros puntos finales de host.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N\",\"baseScore\":6.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"ADJACENT_NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":2.8,\"impactScore\":3.6}],\"cvssMetricV30\":[{\"source\":\"psirt@cisco.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.0\",\"vectorString\":\"CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N\",\"baseScore\":7.4,\"baseSeverity\":\"HIGH\",\"attackVector\":\"ADJACENT_NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":2.8,\"impactScore\":4.0}],\"cvssMetricV2\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"2.0\",\"vectorString\":\"AV:A/AC:L/Au:N/C:N/I:P/A:N\",\"baseScore\":3.3,\"accessVector\":\"ADJACENT_NETWORK\",\"accessComplexity\":\"LOW\",\"authentication\":\"NONE\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"PARTIAL\",\"availabilityImpact\":\"NONE\"},\"baseSeverity\":\"LOW\",\"exploitabilityScore\":6.5,\"impactScore\":2.9,\"acInsufInfo\":false,\"obtainAllPrivilege\":false,\"obtainUserPrivilege\":false,\"obtainOtherPrivilege\":false,\"userInteractionRequired\":false}]},\"weaknesses\":[{\"source\":\"psirt@cisco.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-284\"}]},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-Other\"}]}],\"configurations\":[{\"operator\":\"AND\",\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:cisco:application_policy_infrastructure_controller:7.3\\\\(0\\\\)zn\\\\(0.113\\\\):*:*:*:*:*:*:*\",\"matchCriteriaId\":\"2A9DBF19-A5F0-4F62-84FB-1C73FCA1BF23\"}]},{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:cisco:9432pq:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"5E88418C-0BC4-4D90-A14D-0B89F8399AA5\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:cisco:9536pq:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"4AB93AD1-B5DD-4A69-B1A3-3F163BD2D8BA\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:cisco:9636pq:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"19F88FB2-1A75-4166-A4F5-039D67EAA1D9\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:cisco:9736pq:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"A01B0559-5632-4658-AA3A-221DD28D963F\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:cisco:n9k-x9432c-s:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"082A5A44-DC9A-4B48-8F28-1D0EC7F82410\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:cisco:n9k-x9464px:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"19BCB669-5CC8-4C67-B34C-3F5ADDD4C232\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:cisco:n9k-x9464tx2:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"D5E693D2-F1D5-4D22-885B-AE853221ABA9\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:cisco:n9k-x9564px:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"C63F63AD-94EC-4A6D-92AF-7FBF6275746A\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:cisco:n9k-x9564tx:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"490EAB88-A0F3-4A88-9A81-B414CE78B34B\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:cisco:n9k-x9636c-r:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"7A9CE53D-E8B7-46CD-9B8B-C746A2524BA8\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:cisco:n9k-x9636c-rx:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"C6782DA1-5568-410D-86E6-2C2B909693DD\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:cisco:n9k-x97160yc-ex:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"04A26215-DEB3-4337-AFE0-5E23C760060D\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:cisco:n9k-x9732c-ex:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"6B8F7177-147E-47C0-ADFB-4CD0768D52CD\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:cisco:n9k-x9732c-fx:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"06A72F9F-773A-463D-8BEB-6B316DF21CFD\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:cisco:n9k-x9736c-ex:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"8FC94E7D-84AF-4D2A-85A7-264CED2D107B\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:cisco:n9k-x9736c-fx:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"BC0082AD-1EFB-4AFE-9974-EAAB926553F3\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:cisco:n9k-x9788tc-fx:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"4BFAAE41-AD17-4F69-9029-8DD90D824E6F\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:cisco:nexus_92160yc-x:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"4283E433-7F8C-4410-B565-471415445811\"},{\"vulnerable\":false,\"criteria\":\"cpe:2.3:h:cisco:nexus_93108tc-ex:-:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"A90184B3-C82F-4CE5-B2AD-97D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Party Advisory\",\"VDB Entry\"]},{\"url\":\"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190703-n9kaci-bypass\",\"source\":\"psirt@cisco.com\",\"tags\":[\"Vendor Advisory\"]},{\"url\":\"http://www.securityfocus.com/bid/109052\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Third Party Advisory\",\"VDB Entry\"]},{\"url\":\"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190703-n9kaci-bypass\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Vendor Advisory\"]}]}}"
  }
}


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Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.