Nov 26, 2012 hi everyone, i am new to cisco nexus 7000 series nx os system of appliances. Jun 21, 2018 the other criticalrated bug is cve20180301 and affects the cisco nx os software nx api. The other criticalrated bug is cve20180301 and affects the cisco nx os software nx api. Create the network foundation for a nextgeneration unified fabric data center. Table 1 summarizes the benefits that nxos offers, and table 2 lists the nxos packages available for the cisco nexus 3636cr switch. With an xml interface and a commandline interface cli like that of cisco ios software, nxos provides stateoftheart implementations of relevant. Cve20203170, a vulnerability in the nxapi feature of cisco nxos software could allow an unauthenticated, remote attacker to cause an nxapi system. Automating with nxos lets get started jeff mclaughlin, principal. For more information, see the cisco nexus 7000 series nx os security configuration guide. This is a 5day course designed for systems and field engineers who install and implement the cisco nexus 7000 switch.
Simple network management protocol snmp feature of the cisco nexus 4000 series cve20180299 allows a remote attacker to cause dos. 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. Basic initial configuration of interfaces, session control, hsrp and ospf configuration. 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. Nexus 7700 series switches 0 cisco nexus 7000 0 cisco nexus 6000 0 cisco nexus 5600. Cisco nexus 7000 series nxos programmability guide.
Each device is shipped with the cisco nx os software. Configuring cisco nexus 7000 switches dcnx7k training. Cisco nexus 7000 series nxos programmability guide nxapi. At the time of publication, this vulnerability affected the following cisco products if they had the nx api feature enabled. On cisco nexus 7000 series devices, python is integrated with the underlying cisco nx os network interfaces. From the select a software type list, choose nxos xml schema definition.
Cisco passes around antidotes to noxious nxos code. Oct, 2016 one of the most basic cisco dcloud lab to get you a handson experience on basic nx os running on 7k platforms. Cisco nexus 7000 series nxos programmability guide python. Cisco nexus 7000 series nxos release notes, release 8. Pdf cisco nexus 7000 series nxos programmability guide. Nxapi is an enhancement to the cisco nexus 7000 series cli system, which supports xml output. The vulnerability is due to incorrect input validation of usersupplied data to the nx api subsystem. 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. 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. 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. 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.
Nexus 7000 series switches solution summary cisco nexus switches integrate with rsa authentication manager via radius aaa server group. Cisco nx os software cve20191605 nx api arbitrary code execution vulnerability. Nx api provides the configuration and management capabilities of the cisco nx os cli with webbased apis. Cisco nxos software for cisco nexus 7000 series switches data. 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. 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 unauthenticated, remote attacker to craft a packet to the management interface on an affected system, causing a buffer overflow. The switches offer a full feature set in a highly resilient modular platform. The configuring cisco nexus 7000 switches dcnx7k v3. This support is delivered by nx api, an open source webserver.
The cisco nexus 7000 series switches run on cisco nx os software. Step 5, find the desired release and click download. Note nxapi xml output presents information in a userfriendly format. The cisco nexus platform and nx os switch operating system combine to deliver unprecedented speed, capacity, resilience, and flexibility in todays data center networks. 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 nxos software nxapi arbitrary command execution. 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. Overview nxapi cli is an enhancement to the cisco nexus 7000 series cli system, which supports xml output. Nxos some software for all that new nexus 7000 hardware. Cisco nxos software cve20191605 nxapi arbitrary code. Cisco nx os software nx api arbitrary code execution vulnerability cisco has released free software updates that address the vulnerability described in this advisory. Python integration with cisco nx os network interfaces. Nx api feature of cisco nx os software cve201803 would allow an attacker to send a crafted packet that results in command injection exploit.
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. The vulnerability is due to incorrect input validation in the nx api feature. After posting the request, the output response is displayed. Customers may only install and expect support for software versions and feature sets for which they have purchased a license. This course covers the key components and procedures you need to know to configure, manage, and troubleshoot the cisco nexus 7000 switch platform. Cisco content hub cisco nexus 7000 series switches.
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. This document describes how to upgrade or downgrade the cisco nx os software. The cisco nx os software consists of two imagesthe kickstart image and the system image. Shout out to cloudflare for the open source gortr software and the openbsd project for rpkiclient8. Begin enabling nx api with the feature manager cli command on the switch.
Cisco released patches for more than 30 vulnerabilities. If using nx api, you must enable nx api on all switches run the command feature nxapi from the nx os cli. Cisco nexus 7000 series nx os programmability guide. The python interpreter is available in the cisco nxos software. The advisory explained that the nx api is designed to make the nexus. Cisco nexus 7000 series nxos system cisco community.
A vulnerability in a cli command related to the virtualization manager vman in cisco nxos software could allow an authenticated, local attacker to execute. 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. Introduction to using cisco nxapi jason edelmans blog. Script file download configuration license software images onto the. Cisco nexus 7000 series nx os software upgrade and downgrade guide. Currently our entire data center is supported by cisco nexus switches, specifically the nexus 5600 series and 7000 series nexus switches. These switches utilized in data center operations in a small to medium size data center. Jan 05, 2018 enhanced issu enables you to upgrade nx os software while the nexus switch continues to forward traffic.
Cisco nx os software nx api cve20180301 remote code execution vulnerability. Cisco nexus 7000 series nxos programmability guide overview. 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. These switches support the need for extremely fast, low latency switches that are required for data center speeds. Troubleshooting cisco nexus switches and nx os is your single reference for quickly identifying and solving problems with these businesscritical technologies. When the request format is in xml or json format, the following are the possible nxapi errors, error codes, and messages of an nxapi. The following example shows how to retrieve an html document over the management interface of a device. It was specifically developed for missioncritical enterprise and service provider deployments. I am looking for type of log events that are getting generated by cisco nexus 7000 switches. You can use either of these extensions to the existing cisco nexus cli system on the cisco nexus 7000 series devices. A vulnerability in the nx api feature of cisco nx os software could allow an authenticated, local attacker to execute arbitrary code as root. Cisco nexus 7000 series nxos programmability guide nx.
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 nxos contains open source software oss and commercial technologies that provide automation, orchestration, programmability. Welcome to my community based powershell module for use with cisco nexus 5000 7000 series switches running nx api. Step 4, from the select a software type list, choose nxos xml schema definition. Cisco nxos software nxapi denial of service vulnerability. Cisco nexus 7700 series switches 0 cisco nexus 7000 series switches 0 cisco. Nexus 3232c delivers 128 ports of 25gb or 32 ports of 100gb. 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. Nxoss in service software upgrade issu provides the capability to perform transparent software upgrades on platforms with redundant. Dec 02, 2014 code samples for the cisco nexus 7000 platform. Denial of service in cisco nxos software cybersecurity help sro. 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. The advisory explained that the nx api is designed to make the nexus command line interface available.