NVD

CVE-2019-1890 Detail

Modified

This CVE record has been updated after NVD enrichment efforts were completed. Enrichment data supplied by the NVD may require amendment due to these changes.

Description

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.

Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.

CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

CVSS 3.x Severity and Vector Strings:

NIST: NVD

Base Score: 6.5 MEDIUM

Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Nist CVSS score does not match with CNA score

CNA: Cisco Systems, Inc.

Base Score: 7.4 HIGH

Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N

CVSS 2.0 Severity and Vector Strings:

National Institute of Standards and Technology

NIST: NVD

Base Score: 3.3 LOW

Vector: (AV:A/AC:L/Au:N/C:N/I:P/A:N)

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to [email protected].

URL	Source(s)	Tag(s)
http://www.securityfocus.com/bid/109052	CVE, Cisco Systems, Inc.	Third Party Advisory VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190703-n9kaci-bypass	CVE, Cisco Systems, Inc.	Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
NVD-CWE-Other	Other	NIST
CWE-284	Improper Access Control	Cisco Systems, Inc.

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Denotes Vulnerable Software
Are we missing a CPE here? Please let us know.

Change History

7 change records found show changes

Initial Analysis by NIST 7/11/2019 9:10:15 AM

Action	Type	Old Value	New Value
Added	CVSS V3		AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Added	CVSS V2		(AV:A/AC:L/Au:N/C:N/I:P/A:N)
Added	CWE		CWE-284
Added	CPE Configuration		AND OR cpe:2.3:a:cisco:application_policy_infrastructure_controller:7.3\(0\)zn\(0.113\)::::::: OR cpe:2.3:h:cisco:9432pq:-:::::::* cpe:2.3:h:cisco:9536pq:-:::::::* cpe:2.3:h:cisco:9636pq:-:::::::* cpe:2.3:h:cisco:9736pq:-:::::::* cpe:2.3:h:cisco:n9k-x9432c-s:-:::::::* cpe:2.3:h:cisco:n9k-x9464px:-:::::::* cpe:2.3:h:cisco:n9k-x9464tx2:-:::::::* cpe:2.3:h:cisco:n9k-x9564px:-:::::::* cpe:2.3:h:cisco:n9k-x9564tx:-:::::::* cpe:2.3:h:cisco:n9k-x9636c-r:-:::::::* cpe:2.3:h:cisco:n9k-x9636c-rx:-:::::::* cpe:2.3:h:cisco:n9k-x97160yc-ex:-:::::::* cpe:2.3:h:cisco:n9k-x9732c-ex:-:::::::* cpe:2.3:h:cisco:n9k-x9732c-fx:-:::::::* cpe:2.3:h:cisco:n9k-x9736c-ex:-:::::::* cpe:2.3:h:cisco:n9k-x9736c-fx:-:::::::* cpe:2.3:h:cisco:n9k-x9788tc-fx:-:::::::* cpe:2.3:h:cisco:nexus_92160yc-x:-:::::::* cpe:2.3:h:cisco:nexus_93108tc-ex:-:::::::* cpe:2.3:h:cisco:nexus_93108tc-fx:-:::::::* cpe:2.3:h:cisco:nexus_93120tx:-:::::::* cpe:2.3:h:cisco:nexus_9316d-gx:-:::::::* cpe:2.3:h:cisco:nexus_93180yc-ex:-:::::::* cpe:2.3:h:cisco:nexus_93180yc-fx:-:::::::* cpe:2.3:h:cisco:nexus_93216tc-fx2:-:::::::* cpe:2.3:h:cisco:nexus_93240yc-fx2:-:::::::* cpe:2.3:h:cisco:nexus_9332c:-:::::::* cpe:2.3:h:cisco:nexus_93360yc-fx2:-:::::::* cpe:2.3:h:cisco:nexus_9336c-fx2:-:::::::* cpe:2.3:h:cisco:nexus_9348gc-fxp:-:::::::* cpe:2.3:h:cisco:nexus_93600cd-gx:-:::::::* cpe:2.3:h:cisco:nexus_9364c:-:::::::* cpe:2.3:h:cisco:x9636q-r:-:::::::*
Changed	Reference Type	http://www.securityfocus.com/bid/109052 No Types Assigned	http://www.securityfocus.com/bid/109052 Third Party Advisory, VDB Entry
Changed	Reference Type	https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190703-n9kaci-bypass No Types Assigned	https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190703-n9kaci-bypass Vendor Advisory

CVE Modified by Cisco Systems, Inc. 7/04/2019 5:15:10 PM

Action

Type

Old Value

New Value

Changed

Description

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.

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.

Quick Info

CVE Dictionary Entry:
CVE-2019-1890
NVD Published Date:
07/04/2019
NVD Last Modified:
11/20/2024
Source:
Cisco Systems, Inc.

You are viewing this page in an unauthorized frame window.

Information Technology Laboratory

National Vulnerability Database

National Vulnerability Database

CVE-2019-1890 Detail

Description

Metrics

References to Advisories, Solutions, and Tools

Weakness Enumeration

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Change History

CVE Modified by CVE 11/20/2024 11:37:37 PM

CVE Modified by Cisco Systems, Inc. 5/14/2024 1:54:05 AM

Modified Analysis by NIST 10/16/2020 11:09:50 AM

CVE Modified by Cisco Systems, Inc. 10/09/2019 7:48:26 PM

Initial Analysis by NIST 7/11/2019 9:10:15 AM

CVE Modified by Cisco Systems, Inc. 7/05/2019 10:15:11 AM

CVE Modified by Cisco Systems, Inc. 7/04/2019 5:15:10 PM

Quick Info