CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:X
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Multiple vulnerabilities in the CLI of Cisco FXOS Software and Cisco NX-OS Software could allow an authenticated, local attacker to execute arbitrary commands on the underlying operating system of an affected device.
These vulnerabilities are due to insufficient validation of arguments passed to certain CLI commands. An attacker could exploit these vulnerabilities by including malicious input as the argument of an affected command. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system with elevated privileges. An attacker would need administrator credentials to exploit these vulnerabilities.
Cisco has released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities.
This advisory is available at the following link:
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190515-fxos-nxos-cmdinj-1781-1782
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Vulnerable Products
These vulnerabilities affect the following Cisco products if they are running a vulnerable release of Cisco FXOS or NX-OS Software:
- Firepower 4100 Series
- Firepower 9300 Security Appliances
- MDS 9000 Series Multilayer Switches
- Nexus 3000 Series Switches
- Nexus 3500 Platform Switches
- Nexus 3600 Platform 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
- Nexus 9500 R-Series Switching Platform
- UCS 6200 Series Fabric Interconnects
- UCS 6300 Series Fabric Interconnects
For information about which Cisco FXOS and NX-OS Software releases are vulnerable, see the Fixed Software section of this advisory.
Products Confirmed Not Vulnerable
Only products listed in the Vulnerable Products section of this advisory are known to be affected by these vulnerabilities.
Cisco has confirmed that these vulnerabilities do not affect the following Cisco products:
- Firepower 2100 Series
- Nexus 1000V Switch for Microsoft Hyper-V
- Nexus 1000V Switch for VMware vSphere
- Nexus 9000 Series Fabric Switches in Application Centric Infrastructure (ACI) mode
- UCS 6400 Series Fabric Interconnects
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Cisco has disclosed several similar CLI command injection vulnerabilities. They differ primarily in affected products and software versions. This table shows the affected products for each vulnerability by Cisco bug ID and CVE ID.
Security Advisory FP 4100/
9300MDS 9K/
N7K/
N77001N1000V
MS/VM
N3K/N3500/
N9K-NXOSN3600/
N9500RN5500K/
N5600/
N6KUCS 6200/
UCS 6300
UCS 64002Cisco NX-OS Software Command Injection Vulnerability (CVE-2019-1735) N/A CSCvj63728 CSCvk52969
CSCvk52985CSCvj63877
CSCvk52971CSCvk52988 CSCvk52972 CSCvk52975 Cisco NX-OS Software Line Card Command Injection Vulnerability (CVE-2019-1769) N/A N/A N/A CSCvh20032 CSCvj00299 N/A N/A Cisco NX-OS Software Command Injection Vulnerability (CVE-2019-1770) N/A CSCvh758671 CSCvi92240
CSCvk36294CSCvh75958
CSCvi92242CSCvi92239 CSCvi92243 N/A Cisco NX-OS Software Command Injection Vulnerabilities (CVE-2019-1774, CVE-2019-1775) N/A CSCvh75895
CSCvh75909N/A CSCvh75968
CSCvh75976
CSCvi99197
CSCvi92258CSCvi99195
CSCvi92256CSCvi99198
CSCvi92260N/A Cisco NX-OS Software Command Injection Vulnerability (CVE-2019-1776) N/A CSCvh20081 N/A CSCvh20076
CSCvi96431CSCvi96429 CSCvi96432 CSCvi964332 Cisco NX-OS Software Command Injection Vulnerability (CVE-2019-1778) N/A N/A N/A CSCvh75996 CSCvj03877 N/A N/A Cisco FXOS and NX-OS Software Command Injection Vulnerability (CVE-2019-1779) CSCvj00418 CSCve51688 N/A CSCvh76126 CSCvj00412 CSCvj00416 N/A Cisco FXOS and NX-OS Software Command Injection Vulnerability (CVE-2019-1780) CSCvi92332 CSCvi01440 N/A CSCvi01431
CSCvi92328CSCvi92326 CSCvi92329 N/A Cisco FXOS and NX-OS Software Command Injection Vulnerabilities (CVE-2019-1781, CVE-2019-1782) CSCvi96527
CSCvi92130CSCvi01448
CSCvh20389N/A CSCvi01445
CSCvh20027
CSCvi96524
CSCvi92126CSCvi96522
CSCvi91985CSCvi96525
CSCvi92128CSCvi965262
CSCvi921292Cisco NX-OS Software Command Injection Vulnerability (CVE-2019-1783) N/A CSCvi422811 N/A N/A N/A CSCvj03966 N/A Cisco NX-OS Software Command Injection Vulnerability (CVE-2019-1784) N/A CSCvi422921 N/A N/A N/A CSCvj12273 CSCvj122742 Cisco NX-OS Software Command Injection Vulnerability (CVE-2019-1790) N/A CSCvh20112 N/A CSCvh20096 CSCvi96504 CSCvi96509 CSCvi965102 Cisco NX-OS Software Command Injection Vulnerability (CVE-2019-1791) N/A CSCvj63667 N/A CSCvj63270
CSCvk50873CSCvk50889 CSCvk50876 N/A Cisco FXOS and NX-OS Software Command Injection Vulnerability (CVE-2019-1795) CSCvh66259 CSCvh20359 CSCvh66257
CSCvk30761CSCvh20029
CSCvh66219CSCvh66202 CSCvh66214 CSCvh662432
2. CSCvk52975 applies to UCS 6200, 6300, and 6400. For all other UCS defects, only UCS 6200 and 6300 are affected (and UCS 6400 is not affected).
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There are no workarounds that address these vulnerabilities.
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Cisco has released free software updates that address the vulnerabilities described in this advisory. Customers may only install and expect support for software versions and feature sets for which they have purchased a license. By installing, downloading, accessing, or otherwise using such software upgrades, customers agree to follow the terms of the Cisco software license: https://www.cisco.com/c/en/us/products/end-user-license-agreement.html
Additionally, customers may only download software for which they have a valid license, procured from Cisco directly, or through a Cisco authorized reseller or partner. In most cases this will be a maintenance upgrade to software that was previously purchased. Free security software updates do not entitle customers to a new software license, additional software feature sets, or major revision upgrades.
When considering software upgrades, customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories and Alerts page, to determine exposure and a complete upgrade solution.
In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers.
Customers Without Service Contracts
Customers who purchase directly from Cisco but do not hold a Cisco service contract and customers who make purchases through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should obtain upgrades by contacting the Cisco TAC: https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html
Customers should have the product serial number available and be prepared to provide the URL of this advisory as evidence of entitlement to a free upgrade.
Fixed Releases
No upgrade action is necessary for products that are running Cisco NX-OS Software for cases in which customers have already applied a recommended Cisco NX-OS Software release to address the March 2019 Cisco FXOS and NX-OS Software bundle. See Cisco Event Response: March 2019 Cisco FXOS and NX-OS Software Security Advisory Bundled Publication for a list of advisories in the bundle.
Customers who have not applied a recommended release to address the March 2019 bundle or who have devices that are running Cisco FXOS software are advised to upgrade to an appropriate release as indicated in the applicable table in this section. In the following tables, the left column lists Cisco FXOS and NX-OS Software releases. The right column indicates the first release that includes the fix for the vulnerabilities that are described in this advisory.
Firepower 4100 Series and Firepower 9300 Security Appliances: CSCvi96527 and CSCvi92130
Cisco FXOS Software Release First Fixed Release for These Vulnerabilities
Prior 2.2
2.2.2.91
2.2 2.2.2.91 2.3 2.3.1.130 2.4 2.4.1.222
MDS 9000 Series Multilayer Switches: CSCvi01448 and CSCvh20389
Cisco NX-OS Software Release First Fixed Release for These Vulnerabilities
5.2
6.2(25) 6.2 6.2(25) 7.3 8.3(2) 8.1 8.3(2) 8.2 8.3(2) 8.3 8.3(2) Nexus 3000 Series Switches and Nexus 9000 Series Switches in Standalone NX-OS Mode: CSCvi01445 and CSCvh20027
Cisco NX-OS Software Release First Fixed Release for These Vulnerabilities
Prior to 7.0(3)I4
7.0(3)I4(9) 7.0(3)I4 7.0(3)I4(9) 7.0(3)I7
7.0(3)I7(4)
9.2(1) Not vulnerable
Nexus 3500 Platform Switches: CSCvi96524 and CSCvi92126
Cisco NX-OS Software Release First Fixed Release for These Vulnerabilities
Prior to 6.0(2)A8
6.0(2)A8(11) 6.0(2)A8
6.0(2)A8(11)
7.0(3)I4 7.0(3)I4(9)
7.0(3)I7
7.0(3)I7(4)
9.2 Not vulnerable Nexus 3600 Platform Switches and Nexus 9500 R-Series Switching Platform: CSCvi96522 and CSCvi91985
Cisco NX-OS Software Release First Fixed Release for These Vulnerabilities
7.0(3)
7.0(3)F3(5) 9.2 Not vulnerable
Nexus 5500, 5600, and 6000 Series Switches: CSCvi96525 and CSCvi92128
Cisco NX-OS Software Release First Fixed Release for These Vulnerabilities
Prior to 7.3
7.3(4)N1(1) 7.3 7.3(4)N1(1)
Nexus 7000 and 7700 Series Switches: CSCvi01448 and CSCvh20389
Cisco NX-OS Software Release First Fixed Release for These Vulnerabilities
Prior to 6.2
6.2(22) 6.2
6.2(22) 7.2 7.3(3)D1(1) 7.3 7.3(3)D1(1) 8.0 8.2(3) 8.1 8.2(3) 8.2 8.2(3) 8.3 8.3(1)
UCS 6200 and 6300 Fabric Interconnects: CSCvi96526 and CSCvi92129
Cisco NX-OS Software Release First Fixed Release for These Vulnerabilities
Prior to 4.0
4.0(1a) 4.0 4.0(1a)
Additional Resources
For help determining the best Cisco NX-OS Software release for a Cisco Nexus Switch, administrators can refer to the following Recommended Releases documents. If a security advisory recommends a later release, Cisco recommends following the advisory guidance.
Cisco MDS Series Switches
Cisco Nexus 1000V for VMware Switch
Cisco Nexus 3000 Series and 3500 Series Switches
Cisco Nexus 5000 Series Switches
Cisco Nexus 5500 Platform Switches
Cisco Nexus 6000 Series Switches
Cisco Nexus 7000 Series Switches
Cisco Nexus 9000 Series Switches
Cisco Nexus 9000 Series ACI-Mode Switches
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The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory.
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These vulnerabilities were found during internal security testing.
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To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.
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Version Description Section Status Date 1.0 Initial public release. — Final 2019-May-15
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