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CVE Record

CVE-2018-0090: A vulnerability in management interface access control list (ACL) configuration of Cisco NX-OS System Softw...

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.

UnknownCVSS not scoredNot KEV-listedUpdated
Glexia's TakeAutomated analysis

Security readout for executives and security teams

CVE-2018-0090 affects Cisco NX-OS management interface ACL handling. A remote unauthenticated attacker could bypass configured management ACLs and force traffic to the device CPU, potentially causing high CPU use and denial of service on affected switches. Exposure is most likely where affected Cisco NX-OS switches have reachable management interfaces, especially if management-plane access depends mainly on local management ACLs. Listed product families include Nexus and Multilayer Director Switch platforms running NX-OS. Treat as a focused network availability risk. It can disrupt management-plane processing on core switching infrastructure, but the provided sources do not support claims of active exploitation or compromise of confidentiality. Mitigation focus: Check Cisco advisory cisco-sa-20180117-nxos for affected and fixed NX-OS releases.; Prioritize review of devices running the NX-OS 7.3.2 code train.; Limit management interface reachability using upstream controls independent of the affected device ACL..

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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2Source links

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Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/aCisco NX-OSCisco NX-OSListed
Weakness

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Improper Input Validation

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