Cisco nexus 7000 series nxos programmability guide overview. Once configured, the rsa securid radius aaa server group can be applied to many services provided by the nexus switch, including console access, telnet, ssh, 802. These switches support the need for extremely fast, low latency switches that are required for data center speeds. Open nx os sandboxes on nexus 9000v these sandboxes give access to one or more virtual open nx os switches where you can get hands on with the programability capabilities of nx os including nx api cli and rest, yang data models with netconfrestconf, guest shell, python, and poap. Step 4, from the select a software type list, choose nxos xml schema definition. At the time of publication, this vulnerability affected the following cisco products if they had the nx api feature enabled.
Nexus 3232c delivers 128 ports of 25gb or 32 ports of 100gb. This course covers the key components and procedures you need to know to configure, manage, and troubleshoot the cisco nexus 7000 switch platform. A vulnerability in the python scripting subsystem of cisco nx os software could allow an authenticated, local attacker to escape the python parser and issue arbitrary commands to elevate the attackers privilege level. Nxosv titanium end of development the nxosv virtual machine image that has been provided with virl is based on the titanium development platform, using the nxos operating system with a hardware model based on the nexus 7000series platform. Cisco nxos software nxapi arbitrary code execution.
Troubleshooting cisco nexus switches and nx os is your single reference for quickly identifying and solving problems with these businesscritical technologies. The configuring cisco nexus 7000 switches dcnx7k v3. Pdf cisco nexus 7000 series nxos programmability guide. The following example shows how to retrieve an html document over the management interface of a device. Cisco nexus 7000 series switches ctc technologies inc. Cisco nxos software for cisco nexus 7000 series switches data. The advisory explained that the nx api is designed to make the nexus command line interface available.
Nxos is a network operating system for the nexusseries ethernet switches and mdsseries. You can use either of these extensions to the existing cisco nexus cli system on the cisco nexus 7000 series devices. Step 5, find the desired release and click download. Begin enabling nx api with the feature manager cli command on the switch. Troubleshooting cisco nexus switches and nxos cisco press. Create the network foundation for a nextgeneration unified fabric data center. The cisco nx os software licensing feature allows you to access premium features on the device after you install the appropriate license for that feature. Cisco nexus 7000 series nx os software upgrade and downgrade guide. Each device is shipped with the cisco nx os software. Cisco nx os software nx api cve20180301 remote code execution vulnerability. Cisco nexus 7000 series nxos programmability guide nx.
Overview cisco nexus 7000 series switches nxapi reference. Cisco nx os software nx api arbitrary code execution vulnerability cisco has released free software updates that address the vulnerability described in this advisory. These switches utilized in data center operations in a small to medium size data center. The advisory explained that the nx api is designed to make the nexus.
Nxoss in service software upgrade issu provides the capability to perform transparent software upgrades on platforms with redundant. Nxos some software for all that new nexus 7000 hardware. On cisco nexus 7000 series devices, python is integrated with the underlying cisco nx os network interfaces. If using nx api, you must enable nx api on all switches run the command feature nxapi from the nx os cli. Shout out to cloudflare for the open source gortr software and the openbsd project for rpkiclient8. Cisco nexus 7000 series nxos release notes, release 8. A vulnerability in a cli command related to the virtualization manager vman in cisco nxos software could allow an authenticated, local attacker to execute. I am looking for type of log events that are getting generated by cisco nexus 7000 switches. Nx api feature of cisco nx os software cve201803 would allow an attacker to send a crafted packet that results in command injection exploit. The environment that my colleague talked about was a nexus 7k and 5k environment and since some months, the cisco nx api is also supported with the nexus 7000, 6000 and 5000 platform using nx os version 7. My entire goal for this project was to get away from using cisco ucs directors implementation of nx os interaction which involved a heavy amount of slow java code and ssh screenscraping with xml formatting to polish off the.
Cisco nexus 7000 series nxos programmability guide. Dec 02, 2014 code samples for the cisco nexus 7000 platform. Script file download configuration license software images onto the. Cisco nxos software nxapi denial of service vulnerability. I read about the cisco nx api within the context of the nexus 9k in nx os mode some time ago on the blog of jason edelman. Cve20203170, a vulnerability in the nxapi feature of cisco nxos software could allow an unauthenticated, remote attacker to cause an nxapi system. This is a 5day course designed for systems and field engineers who install and implement the cisco nexus 7000 switch. With an xml interface and a commandline interface cli like that of cisco ios software, nxos provides stateoftheart implementations of relevant. This article showed how to make use of various nexus nx os command options and operators, how to combine multiple nexus commands, filter show commands output, create and execute nx os scripts, introduced python scripting and environment and covered a number of nexus nx os hints and tips to help administrators and engineers make their daytoday. Nx osv is a reference platform for an implementation of the cisco nexus operating system, based on the nexus 7000 series platforms, running as a full virtual machine on a hypervisor. Nxapi also supports json output format for specific commands. Welcome to my community based powershell module for use with cisco nexus 5000 7000 series switches running nx api.
Nx os some software for all that new nexus 7000 hardware news flash cisco has released a new operating system for the new nexus 7000 series switches. A vulnerability in the nx api feature of cisco nx os software could allow an authenticated, local attacker to execute arbitrary code as root. For more information, see the cisco nexus 7000 series nx os security configuration guide. Cisco nxos contains open source software oss and commercial technologies that provide automation, orchestration, programmability.
Cisco passes around antidotes to noxious nxos code execution. Mds 9000 series multilayer switches that were running cisco nx os software releases earlier than release 8. Nexus 7700 series switches 0 cisco nexus 7000 0 cisco nexus 6000 0 cisco nexus 5600. Table 2 shows the cisco nexus 7000 series switch and cisco nexus 7700 switch hardware support details table 3 shows the fabric extender fex modules supported by the cisco nexus 7000 and cisco nexus 7700 io modules table 4 shows the transceiver devices supported in each release of cisco nexus 7000 series for a list of minimum recommended cisco nx os software releases for use with cisco. Cisco released patches for more than 30 vulnerabilities. Customers may only install and expect support for software versions and feature sets for which they have purchased a license.
Cisco content hub cisco nexus 7000 series switches. Nxapi is an enhancement to the cisco nexus 7000 series cli system, which supports xml output. Cisco nx os software cve20191605 nx api arbitrary code execution vulnerability. From the select a software type list, choose nxos xml schema definition. The cisco nexus 7000 series switches run on cisco nx os software. The cisco nexus platform and nx os switch operating system combine to deliver unprecedented speed, capacity, resilience, and flexibility in todays data center networks. Nexus 7000 series switches solution summary cisco nexus switches integrate with rsa authentication manager via radius aaa server group. Dcnx7k configuring cisco nexus 7000 training course. The switches offer a full feature set in a highly resilient modular platform. A vulnerability in the nx api feature of cisco nx os software could allow an authenticated, remote attacker to send a malicious packet to the management interface on an affected system and execute a commandinjection exploit. A common programmatic approach using nx api across the entire nexus switch portfolio nexus 2000 through nexus 9000 switches new nexus 3200 top of rack switches for next generation 10g25g40g50g100g cloud data centers are available q3cy15. Cisco enhances sdn strategy and offerings across the entire.
Currently our entire data center is supported by cisco nexus switches, specifically the nexus 5600 series and 7000 series nexus switches. Denial of service in cisco nxos software cybersecurity help sro. Cisco nexus operation system nx os, running on the cisco nexus 5000 series switches, cisco nexus 6000 series switches, cisco nexus 7000 series switches and cisco mds 9000 series multilayer switches include a version of open secure shell openssh software that is affected by the vulnerabilities identified by the following common vulnerability and exposures cve ids. Cisco nxos software nxapi arbitrary command execution.
Cisco nexus 7000 series nxos fundamentals configuration. The vulnerability is due to incorrect input validation of usersupplied data to the nx api subsystem. Basic initial configuration of interfaces, session control, hsrp and ospf configuration. Introduction to using cisco nxapi jason edelmans blog. Oct, 2016 one of the most basic cisco dcloud lab to get you a handson experience on basic nx os running on 7k platforms. Simple network management protocol snmp feature of the cisco nexus 4000 series cve20180299 allows a remote attacker to cause dos. Configuring cisco nexus 7000 switches dcnx7k training. The other criticalrated bug is cve20180301 and affects the cisco nx os software nx api. November 18, 2014 ive posted a few times in the past about ciscos nxapi and realized i hadnt provided any guidance on how to get started using the api itself. Automating with nxos lets get started jeff mclaughlin, principal. Nx api provides the configuration and management capabilities of the cisco nx os cli with webbased apis. Table 1 summarizes the benefits that nxos offers, and table 2 lists the nxos packages available for the cisco nexus 3636cr switch. It was specifically developed for missioncritical enterprise and service provider deployments. Contribute to datacenternexus7000 development by creating an account on github.
Cisco nexus 7000 series nx os programmability guide. This support is delivered by nx api, an open source webserver. Cisco nexus 7000 series nxos programmability guide nxapi. After posting the request, the output response is displayed. The python interpreter is available in the cisco nxos software. Cisco passes around antidotes to noxious nxos code. Cisco nxos software cve20191605 nxapi arbitrary code. Python integration with cisco nx os network interfaces. Jan 05, 2018 enhanced issu enables you to upgrade nx os software while the nexus switch continues to forward traffic. Nov 26, 2012 hi everyone, i am new to cisco nexus 7000 series nx os system of appliances. Jun 10, 2015 cisco vts extends the cisco sdn strategy and portfolio, which includes cisco application centric infrastructure aci, as well ciscos programmable nxos platforms, to a broader market and for additional use cases, which includes our massive installed base of nexus 20007000 products, and to customers whose primary sdn challenge is in the. This document describes how to upgrade or downgrade the cisco nx os software. Overview nxapi cli is an enhancement to the cisco nexus 7000 series cli system, which supports xml output.
The cisco nx os software consists of two imagesthe kickstart image and the system image. The modular cisco nexus 7000 and 7700 switches deliver a comprehensive cisco nx os feature set and opensource programmable tools for software defined networking sdn deployments. When the request format is in xml or json format, the following are the possible nxapi errors, error codes, and messages of an nxapi. Cisco nexus 7700 series switches 0 cisco nexus 7000 series switches 0 cisco. The vulnerability is due to incorrect input validation in the nx api feature. A vulnerability in the nx api feature of cisco nx os software could allow an unauthenticated, remote attacker to craft a packet to the management interface on an affected system, causing a buffer overflow. Cisco nexus 7000 series nxos system cisco community.
709 677 1148 1493 1242 1472 1465 45 566 813 476 1167 671 401 200 891 1421 994 883 206 472 1458 262 175 1166 291 772 1460 1156 1468 703 149 1485 867 403 1356