Wednesday, May 15, 2019

Cisco FXOS and NX-OS Software Command Injection Vulnerability (CVE-2019-1780)

Medium
Advisory ID:
cisco-sa-20190515-nxos-fxos-cmdinj-1780
First Published:
2019 May 15 16:00 GMT
Version 1.0:
Workarounds:
No workarounds available
CVE-2019-1780
CWE-77
CVSS Score:
Base 4.2Click Icon to Copy Verbose Score
CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L/E:X/RL:X/RC:X
CVE-2019-1780
CWE-77

Summary

  • A vulnerability in the CLI of Cisco FXOS Software and Cisco NX-OS Software could allow an authenticated, local attacker with administrator credentials to execute arbitrary commands on the underlying operating system of an affected device with elevated privileges.

    The vulnerability is due to insufficient validation of arguments passed to certain CLI commands. An attacker could exploit this vulnerability 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 valid administrator credentials to exploit this vulnerability.

    Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

    This advisory is available at the following link:
    https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190515-nxos-fxos-cmdinj-1780

Affected Products

  • Vulnerable Products

    This vulnerability affects the following Cisco products if they are running a vulnerable release of Cisco FXOS Software 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

    For information about which Cisco FXOS Software 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 this vulnerability.

    Cisco has confirmed that this vulnerability does 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 6200 Series Fabric Interconnects
    • UCS 6300 Series Fabric Interconnects
    • UCS 6400 Series Fabric Interconnects

Details

  • 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/
    9300    		 MDS 9K/
    N7K/
    N77001    		 N1000V
    MS/VM
    		 N3K/N3500/
    N9K-NXOS    		 N3600/
    N9500R    		 N5500K/
    N5600/
    N6K    		 UCS 6200/
    UCS 6300
    UCS 64002
    Cisco NX-OS Software Command Injection Vulnerability (CVE-2019-1735) N/A CSCvj63728 CSCvk52969
    CSCvk52985    		 CSCvj63877
    CSCvk52971    		 CSCvk52988 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
    CSCvk36294    		 CSCvh75958
    CSCvi92242    		 CSCvi92239 CSCvi92243 N/A
    Cisco NX-OS Software Command Injection Vulnerabilities (CVE-2019-1774, CVE-2019-1775) N/A CSCvh75895
    CSCvh75909    		 N/A CSCvh75968
    CSCvh75976
    CSCvi99197
    CSCvi92258    		 CSCvi99195
    CSCvi92256    		 CSCvi99198
    CSCvi92260    		 N/A
    Cisco NX-OS Software Command Injection Vulnerability (CVE-2019-1776) N/A CSCvh20081 N/A CSCvh20076
    CSCvi96431    		 CSCvi96429 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
    CSCvi92328    		 CSCvi92326 CSCvi92329 N/A
    Cisco FXOS and NX-OS Software Command Injection Vulnerabilities (CVE-2019-1781, CVE-2019-1782) CSCvi96527
    CSCvi92130    		 CSCvi01448
    CSCvh20389    		 N/A CSCvi01445
    CSCvh20027
    CSCvi96524
    CSCvi92126    		 CSCvi96522
    CSCvi91985    		 CSCvi96525
    CSCvi92128    		 CSCvi965262
    CSCvi921292
    Cisco 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
    CSCvk50873    		 CSCvk50889 CSCvk50876 N/A
    Cisco FXOS and NX-OS Software Command Injection Vulnerability (CVE-2019-1795) CSCvh66259 CSCvh20359 CSCvh66257
    CSCvk30761    		 CSCvh20029
    CSCvh66219    		 CSCvh66202 CSCvh66214 CSCvh662432
    1. CSCvh75867, CSCvi42281, and CSCvi42292 apply to only Nexus 7000 Series and Nexus 7700 Series Switches. The MDS 9000 Series Multilayer Switches are not affected by these vulnerabilities.
    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).

Workarounds

  • There are no workarounds that address this vulnerability.

Fixed Software

  • Cisco has released free software updates that address the vulnerability 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 this vulnerability.

    Firepower 4100 Series and Firepower 9300 Security Appliances: CSCvi92332

    Cisco FXOS Software Release First Fixed Release for This Vulnerability
    Prior to 2.3
    		 2.3.1.130
    2.3
    		 2.3.1.130
    2.4 2.4.1.122

    MDS 9000 Series Multilayer Switches: CSCvi01440

    Cisco NX-OS Software Release First Fixed Release for This Vulnerability
    5.2
    		 6.2(25)
    6.2 6.2(25)
    7.3 8.1(1b)
    8.1 8.1(1b)
    8.2 8.2(3)
    8.3 8.3(1)

    Nexus 3000 Series Switches and Nexus 9000 Series Switches in Standalone NX-OS Mode: CSCvi01431

    Cisco NX-OS Software Release First Fixed Release for This Vulnerability
    Prior to 7.0(3)I4
    		 7.0(3)I7(3)
    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: CSCvi92328

    Cisco NX-OS Software Release First Fixed Release for This Vulnerability
    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: CSCvi92326

    Cisco NX-OS Software Release First Fixed Release for This Vulnerability
    7.0(3)
    		 7.0(3)F3(5)
    9.2 Not vulnerable

    Nexus 5500 and 5600 Platform Switches and 6000 Series Switches: CSCvi92329

    Cisco NX-OS Software Release First Fixed Release for This Vulnerability
    Prior to 7.3
    		 7.3(3)N1(1)
    7.3 7.3(3)N1(1)

    Nexus 7000 and 7700 Series Switches: CSCvi01440

    Cisco NX-OS Software Release First Fixed Release for This Vulnerability
    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)

    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

    For help determining the best Cisco NX-OS Software release for Cisco UCS, refer to the Recommended Releases documents in the release notes for the device.

Exploitation and Public Announcements

  • The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.

Source

  • This vulnerability was found during internal security testing.

Cisco Security Vulnerability Policy

  • 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.

Subscribe to Cisco Security Notifications

URL

Revision History

  • Version Description Section Status Date
    1.0 Initial public release. — Final 2019-May-15
    Show Less

Cisco Security Vulnerability Policy

  • 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.

Subscribe to Cisco Security Notifications



from Cisco Security Advisory http://bit.ly/2JomARV
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