Description

A vulnerability in management interface access control list (ACL) configuration of Cisco NX-OS System Software could allow an unauthenticated, remote attacker to bypass configured ACLs on the management interface. This could allow traffic to be forwarded to the NX-OS CPU for processing, leading to high CPU utilization and a denial of service (DoS) condition. The vulnerability is due to a bad code fix in the 7.3.2 code train that could allow traffic to the management interface to be misclassified and not match the proper configured ACLs. An attacker could exploit this vulnerability by sending crafted traffic to the management interface. An exploit could allow the attacker to bypass the configured management interface ACLs and impact the CPU of the targeted device, resulting in a DoS condition. This vulnerability affects the following Cisco products running Cisco NX-OS System Software: Multilayer Director Switches, Nexus 2000 Series Switches, Nexus 3000 Series Switches, Nexus 5500 Platform Switches, Nexus 5600 Platform Switches, Nexus 6000 Series Switches, Nexus 7000 Series Switches, Nexus 7700 Series Switches, Nexus 9000 Series Switches in standalone NX-OS mode. Cisco Bug IDs: CSCvf31132.

Metrics

 

CVSS Version 4.0 CVSS Version 3.x CVSS Version 2.0

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:  7.5 HIGH

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

CVSS 2.0 Severity and Vector Strings:

NIST: NVD

Base Score:  5.0 MEDIUM

Vector:  (AV:N/AC:L/Au:N/C:N/I:N/A:P)

References to Advisories, Solutions, and Tools

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Hyperlink	Resource
http://www.securityfocus.com/bid/102753	Third Party Advisory  VDB Entry
http://www.securitytracker.com/id/1040247	Third Party Advisory  VDB Entry
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180117-nxos	Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-400	Uncontrolled Resource Consumption	NIST
CWE-20	Improper Input Validation	Cisco Systems, Inc.

Known Affected Software Configurations Switch to CPE 2.2

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Change History

5 change records found show changes

CVE Modified by Cisco Systems, Inc. 5/14/2024 12:50:21 AM

Action	Type	Old Value	New Value

CVE Modified by Cisco Systems, Inc. 10/09/2019 7:31:12 PM

Action	Type	Old Value	New Value
Added	CWE		Cisco Systems, Inc. CWE-20

Initial Analysis by NIST 2/07/2018 6:58:28 AM

Action	Type	Old Value	New Value
Added	CPE Configuration		OR *cpe:2.3:o:cisco:nx-os:7.3\(2\)n1\(0.6\):*:*:*:*:*:*:* *cpe:2.3:o:cisco:nx-os:8.3\(0\)kms\(0.31\):*:*:*:*:*:*:* *cpe:2.3:o:cisco:nx-os:8.8\(3.5\)s0:*:*:*:*:*:*:*
Added	CVSS V2		(AV:N/AC:L/Au:N/C:N/I:N/A:P)
Added	CVSS V3		AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Added	CWE		CWE-400
Changed	Reference Type	http://www.securityfocus.com/bid/102753 No Types Assigned	http://www.securityfocus.com/bid/102753 Third Party Advisory, VDB Entry
Changed	Reference Type	http://www.securitytracker.com/id/1040247 No Types Assigned	http://www.securitytracker.com/id/1040247 Third Party Advisory, VDB Entry
Changed	Reference Type	https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180117-nxos No Types Assigned	https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180117-nxos Vendor Advisory

CVE Modified by Cisco Systems, Inc. 1/23/2018 9:29:01 PM

Action	Type	Old Value	New Value
Added	Reference		http://www.securityfocus.com/bid/102753 [No Types Assigned]

CVE Modified by Cisco Systems, Inc. 1/19/2018 9:29:01 PM

Action	Type	Old Value	New Value
Added	Reference		http://www.securitytracker.com/id/1040247 [No Types Assigned]