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ID

VAR-201908-0856


CVE

CVE-2019-1977


TITLE

Cisco Nexus 9000 Series switch state vulnerability

Trust: 0.8

sources: JVNDB: JVNDB-2019-008863

DESCRIPTION

A vulnerability within the Endpoint Learning feature of Cisco Nexus 9000 Series Switches running in Application Centric Infrastructure (ACI) mode could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an endpoint device in certain circumstances. The vulnerability is due to improper endpoint learning when packets are received on a specific port from outside the ACI fabric and destined to an endpoint located on a border leaf when Disable Remote Endpoint Learning has been enabled. This can result in a Remote (XR) entry being created for the impacted endpoint that will become stale if the endpoint migrates to a different port or leaf switch. This results in traffic not reaching the impacted endpoint until the Remote entry can be relearned by another mechanism. Cisco Nexus 9000 Series switches have a state vulnerability.Service operation interruption (DoS) There is a possibility of being put into a state. NX-OS ACI Software is one of the operating systems used in Cisco network equipment. A remote attacker could exploit this vulnerability to cause a denial of service

Trust: 1.71

sources: NVD: CVE-2019-1977 // JVNDB: JVNDB-2019-008863 // VULHUB: VHN-152249

AFFECTED PRODUCTS

vendor:ciscomodel:nx-osscope:eqversion:12.3\(1h\)

Trust: 1.0

vendor:ciscomodel:nx-osscope:eqversion:13.1\(2o\)

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vendor:ciscomodel:nx-osscope:eqversion:13.1\(2m\)

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vendor:ciscomodel:nx-osscope:eqversion:13.1\(2p\)

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vendor:ciscomodel:nx-osscope: - version: -

Trust: 0.8

sources: JVNDB: JVNDB-2019-008863 // NVD: CVE-2019-1977

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov: CVE-2019-1977
value: HIGH

Trust: 1.0

ykramarz@cisco.com: CVE-2019-1977
value: MEDIUM

Trust: 1.0

NVD: CVE-2019-1977
value: HIGH

Trust: 0.8

CNNVD: CNNVD-201908-2134
value: HIGH

Trust: 0.6

VULHUB: VHN-152249
value: MEDIUM

Trust: 0.1

nvd@nist.gov: CVE-2019-1977
severity: MEDIUM
baseScore: 4.3
vectorString: AV:N/AC:M/AU:N/C:N/I:N/A:P
accessVector: NETWORK
accessComplexity: MEDIUM
authentication: NONE
confidentialityImpact: NONE
integrityImpact: NONE
availabilityImpact: PARTIAL
exploitabilityScore: 8.6
impactScore: 2.9
acInsufInfo: NONE
obtainAllPrivilege: NONE
obtainUserPrivilege: NONE
obtainOtherPrivilege: NONE
userInteractionRequired: NONE
version: 2.0

Trust: 1.8

VULHUB: VHN-152249
severity: MEDIUM
baseScore: 4.3
vectorString: AV:N/AC:M/AU:N/C:N/I:N/A:P
accessVector: NETWORK
accessComplexity: MEDIUM
authentication: NONE
confidentialityImpact: NONE
integrityImpact: NONE
availabilityImpact: PARTIAL
exploitabilityScore: 8.6
impactScore: 2.9
acInsufInfo: NONE
obtainAllPrivilege: NONE
obtainUserPrivilege: NONE
obtainOtherPrivilege: NONE
userInteractionRequired: NONE
version: 2.0

Trust: 0.1

nvd@nist.gov: CVE-2019-1977
baseSeverity: HIGH
baseScore: 7.5
vectorString: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
attackVector: NETWORK
attackComplexity: LOW
privilegesRequired: NONE
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: NONE
integrityImpact: NONE
availabilityImpact: HIGH
exploitabilityScore: 3.9
impactScore: 3.6
version: 3.0

Trust: 1.8

ykramarz@cisco.com: CVE-2019-1977
baseSeverity: MEDIUM
baseScore: 6.8
vectorString: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H
attackVector: NETWORK
attackComplexity: HIGH
privilegesRequired: NONE
userInteraction: NONE
scope: CHANGED
confidentialityImpact: NONE
integrityImpact: NONE
availabilityImpact: HIGH
exploitabilityScore: 2.2
impactScore: 4.0
version: 3.0

Trust: 1.0

sources: VULHUB: VHN-152249 // JVNDB: JVNDB-2019-008863 // CNNVD: CNNVD-201908-2134 // NVD: CVE-2019-1977 // NVD: CVE-2019-1977

PROBLEMTYPE DATA

problemtype:CWE-371

Trust: 1.9

sources: VULHUB: VHN-152249 // JVNDB: JVNDB-2019-008863 // NVD: CVE-2019-1977

THREAT TYPE

remote

Trust: 0.6

sources: CNNVD: CNNVD-201908-2134

TYPE

other

Trust: 0.6

sources: CNNVD: CNNVD-201908-2134

CONFIGURATIONS

sources:
            
            
            JVNDB: JVNDB-2019-008863

PATCH
title:cisco-sa-20190828-nexus-aci-dosurl:https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190828-nexus-aci-dos
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title:Cisco Nexus 9000 Series Switches NX-OS ACI Software Security vulnerabilitiesurl:http://www.cnnvd.org.cn/web/xxk/bdxqById.tag?id=97622
Trust: 0.6
sources:
            
            
            JVNDB: JVNDB-2019-008863 // 
            
            
            
            CNNVD: CNNVD-201908-2134

EXTERNAL IDS
db:NVDid:CVE-2019-1977
Trust: 2.5
db:JVNDBid:JVNDB-2019-008863
Trust: 0.8
db:CNNVDid:CNNVD-201908-2134
Trust: 0.7
db:AUSCERTid:ESB-2019.3277
Trust: 0.6
db:VULHUBid:VHN-152249
Trust: 0.1
sources:
            
            
            VULHUB: VHN-152249 // 
            
            
            
            JVNDB: JVNDB-2019-008863 // 
            
            
            
            CNNVD: CNNVD-201908-2134 // 
            
            
            
            NVD: CVE-2019-1977

REFERENCES
url:https://tools.cisco.com/security/center/content/ciscosecurityadvisory/cisco-sa-20190828-nexus-aci-dos
Trust: 1.7
url:https://nvd.nist.gov/vuln/detail/cve-2019-1977
Trust: 1.4
url:https://cve.mitre.org/cgi-bin/cvename.cgi?name=cve-2019-1977
Trust: 0.8
url:https://vigilance.fr/vulnerability/cisco-nexus-9000-denial-of-service-via-endpoint-learning-30186
Trust: 0.6
url:https://www.auscert.org.au/bulletins/esb-2019.3277/
Trust: 0.6
sources:
            
            
            VULHUB: VHN-152249 // 
            
            
            
            JVNDB: JVNDB-2019-008863 // 
            
            
            
            CNNVD: CNNVD-201908-2134 // 
            
            
            
            NVD: CVE-2019-1977

SOURCES
db:VULHUBid:VHN-152249
db:JVNDBid:JVNDB-2019-008863
db:CNNVDid:CNNVD-201908-2134
db:NVDid:CVE-2019-1977

LAST UPDATE DATE
2024-11-23T22:51:41.757000+00:00

SOURCES UPDATE DATE
db:VULHUBid:VHN-152249date:2019-10-09T00:00:00
db:JVNDBid:JVNDB-2019-008863date:2019-09-06T00:00:00
db:CNNVDid:CNNVD-201908-2134date:2019-09-06T00:00:00
db:NVDid:CVE-2019-1977date:2024-11-21T04:37:48.753

SOURCES RELEASE DATE
db:VULHUBid:VHN-152249date:2019-08-30T00:00:00
db:JVNDBid:JVNDB-2019-008863date:2019-09-06T00:00:00
db:CNNVDid:CNNVD-201908-2134date:2019-08-28T00:00:00
db:NVDid:CVE-2019-1977date:2019-08-30T09:15:20.553